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# jay_diff — JSON diff / patch library
`utils/jay_diff.py` is a lightweight, pure-Python library for computing and
applying structural diffs between two JSON-compatible dicts. It is used by
`collect.py` and `gui_client.py` to compress the push-server stream: instead
of retransmitting full snapshots on every poll, the server sends only the
fields that changed since the previous snapshot.
---
## Concepts
A **diff** is itself a plain dict. It describes what changed from an **old**
state to a **new** state using one or more of these keys:
| Key | Meaning |
|-----|---------|
| `update_add` | Fields whose value changed *or* that are new in `new` |
| `update` | Fields whose value changed (must already exist in `old`) |
| `add` | Fields that are new in `new` (did not exist in `old`) |
| `delete` | Fields that were removed or whose sub-keys were pruned |
`update_add` combines `update` and `add` into a single key (the mode used
everywhere in this project). The separate `update` / `add` form is
available via `combine_upd_add=False` for completeness.
An **empty dict `{}`** returned by `jay_diff_full` means the two states are
identical.
### Delete-delta encoding
Values inside the `delete` sub-dict carry a specific meaning:
| Value in delete delta | Effect when merged |
|-----------------------|--------------------|
| `None` | The **entire key** is deleted from `old` |
| A **non-empty dict** | Recurse into the sub-dict and delete those specific sub-keys; the parent key is kept (possibly as `{}`) |
| A **scalar** (string, int, …) | The key is deleted from `old` |
| `{}` (empty dict) | The key is deleted from `old` |
This distinction matters when the new state has an empty dict `{}` at a
location where the old state had a populated dict. In that case the delete
delta carries the populated sub-keys as a non-empty dict — after merging,
the parent key is preserved as `{}`. If the key is entirely absent from
the new state, `None` is stored in the delta, and the merge removes the key
completely.
---
## API
### Diff functions
```python
jay_diff_full(old, new, combine_upd_add=True) -> dict
```
The main entry point. Computes a complete diff from `old` to `new`.
- `combine_upd_add=True` (default) — produces `update_add` + `delete`
- `combine_upd_add=False` — produces `update` + `add` + `delete`
Returns `{}` when `old == new`.
```python
jay_diff_add(old, new) -> dict
```
Returns keys present in `new` but absent from `old` (additions only).
```python
jay_diff_del(old, new) -> dict
```
Returns keys present in `old` but absent from `new`, or sub-keys that were
removed from a shared dict. Uses `None` as sentinel for entirely-absent
dict keys.
```python
jay_diff_upd(old, new) -> dict
```
Returns keys present in both `old` and `new` whose values differ (updates
only; new keys are ignored).
```python
jay_diff_upd_add(old, new) -> dict
```
Like `jay_diff_upd` but also includes keys new in `new` — equivalent to
`jay_diff_full(..., combine_upd_add=True)` minus the delete section.
---
### Merge functions
```python
jay_merge_full(old, diff) -> dict
```
The main entry point. Applies a diff produced by `jay_diff_full` to `old`
and returns the reconstructed new state.
**Bootstrap passthrough:** if `old` is `{}` and `diff` contains none of the
recognised diff keys, `diff` is returned as-is. This is how the first
message from the push server is handled: the server sends
`jay_diff_full({}, record[0])`, which looks like a plain snapshot, and the
client stores it directly.
Applies operations in order: `update``update_add``add``delete`.
```python
jay_merge_update(old, new) -> dict # apply an update/update_add delta
jay_merge_add(old, new) -> dict # apply an add delta
jay_merge_delete(old, new) -> dict # apply a delete delta
```
Low-level helpers; prefer `jay_merge_full` unless you need fine-grained
control.
---
## Round-trip guarantee
```
jay_merge_full(old, jay_diff_full(old, new)) == new
```
This holds for all inputs where values are JSON-compatible scalars (strings,
numbers, booleans, `None`, lists) or nested dicts thereof. It is verified
by `tests/test_jay_diff_real_data.py` against 674 consecutive pairs of real
vehicle snapshots.
---
## Wire format
`jay_diff_full` / `jay_merge_full` are used by the push server when
`--diff` is enabled. The diff dict is serialised as a newline-delimited
JSON line.
- The **first** message to a new client is `jay_diff_full({}, record[0])`,
which always contains `update_add` with every field of the first record.
- Subsequent messages contain only the changed fields.
- The format is self-describing: a message with none of the diff keys is
treated as a full snapshot by `jay_merge_full` (bootstrap passthrough).
`null` in JSON round-trips to Python `None`, so the delete sentinel survives
serialisation transparently.
---
## Tests
```
tests/test_jay_diff.py — 104 unit tests (all diff/merge functions,
corner cases: type changes, empty dicts,
deep nesting, round-trips)
tests/test_jay_diff_real_data.py — parametrised over 675 real VW snapshots
in tests/data/ (674 consecutive pairs):
round-trip, identical diff = {}, and
empty-diff-is-noop checks
```
Run with:
```bash
pytest tests/
```
---
## Bug history
### `jay_merge_delete`: crash on aliased dicts (fixed)
`jay_diff_rev` (used internally by the old `jay_diff_del`) stored references
to sub-dicts of `_old` directly in the delete delta without copying them.
When `jay_merge_full(old, jay_diff_full(old, new))` was called, some
sub-dicts in the delete delta were the same Python objects as sub-dicts in
`old`. Iterating `_new.items()` while deleting from `_old` (the same
object) raised `RuntimeError: dictionary changed size during iteration`.
**Fix:** `list(_new.items())` snapshots the items before the loop. Also,
`jay_diff_del` was rewritten as a standalone recursive function that never
stores aliases to its inputs.
### `jay_merge_delete`: empty dict wrongly pruned (fixed)
When the new state had an empty dict `{}` at a location where the old state
had a non-empty dict, `jay_merge_delete` would delete all sub-keys and then
prune the now-empty parent key entirely. The result differed from `new`,
which retained the parent key as `{}`.
Root cause: the old delta format stored the full old sub-dict for both "key
absent from new" and "key present but empty in new" — the two cases were
indistinguishable at merge time.
**Fix:** `jay_diff_del` now stores `None` for dict keys entirely absent from
`new`, and a non-empty sub-dict for partial deletions. `jay_merge_delete`
no longer prunes: a `None` (or scalar) value in the delta is the explicit
signal to remove the parent key.
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from jay_diff.jay_diff import (
jay_diff_add, jay_diff_del, jay_diff_upd, jay_diff_upd_add,
jay_diff_full, jay_merge_add, jay_merge_delete, jay_merge_update, jay_merge_full,
)
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from copy import deepcopy
def jay_diff_rev(_old, _new):
delta = {}
if not isinstance(_old, dict):
return delta
for k in _new.keys():
if k in _old:
if isinstance(_new[k], dict):
res = jay_diff_rev(_old[k], _new[k])
if len(res.keys()):
delta[k] = res
else:
_old[k] = _new[k]
delta[k] = _new[k]
return delta
def jay_diff_add(_old, _new):
__old = deepcopy(_old)
delta = jay_diff_rev(__old, _new)
return delta
def jay_diff_del(_old, _new):
delta = {}
for k in _old:
if k in _new:
if isinstance(_old[k], dict) and isinstance(_new[k], dict):
sub = jay_diff_del(_old[k], _new[k])
if sub:
delta[k] = sub
else:
# key absent from _new: None signals "delete entire key" for dicts
delta[k] = None if isinstance(_old[k], dict) else _old[k]
return delta
def jay_diff_upd(_old, _new, add_if_not_exist=False):
delta = {}
for k in _new.keys():
if k in _old:
if isinstance(_new[k], dict):
res = jay_diff_upd(_old[k], _new[k], add_if_not_exist)
if len(res.keys()):
delta[k] = res
elif _new[k] != _old[k]:
delta[k] = _new[k]
elif add_if_not_exist:
delta[k] = _new[k]
return delta
def jay_diff_upd_add(_old, _new):
return jay_diff_upd(_old, _new, add_if_not_exist=True)
def jay_diff_full(_old, _new, combine_upd_add=True):
diff = {}
if combine_upd_add:
res = jay_diff_upd_add(_old, _new)
if len(res.keys()):
diff['update_add'] = res
res = jay_diff_del(_old, _new)
if len(res.keys()):
diff['delete'] = res
else:
res = jay_diff_upd(_old, _new)
if len(res.keys()):
diff['update'] = res
res = jay_diff_add(_old, _new)
if len(res.keys()):
diff['add'] = res
res = jay_diff_del(_old, _new)
if len(res.keys()):
diff['delete'] = res
return diff
def jay_merge_update(_old, _new):
for k, v in _new.items():
if isinstance(v, dict):
r = jay_merge_update(_old.get(k, {}), v)
_old[k] = r
else:
if isinstance(_old, dict):
_old[k] = _new[k]
else:
_old = _new
return _old
def jay_merge_add(_old, _new):
for k, v in _new.items():
if isinstance(v, dict):
r = jay_merge_add(_old.get(k, {}), v)
if k in _old:
_old[k].update(r)
else:
_old[k] = r
else:
_old[k] = _new[k]
return _old
def jay_merge_delete(_old, _new):
for k, v in list(_new.items()):
if isinstance(v, dict) and v:
if k in _old and isinstance(_old[k], dict):
jay_merge_delete(_old[k], v)
else:
if k in _old:
del _old[k]
return _old
def jay_merge_full(_old, _diff):
_is_diff = False
res = _old
if "update" in _diff:
res = jay_merge_update(res, _diff['update'])
_is_diff = True
if "update_add" in _diff:
res = jay_merge_update(res, _diff['update_add'])
_is_diff = True
if "add" in _diff:
res = jay_merge_add(res, _diff['add'])
_is_diff = True
if "delete" in _diff:
res = jay_merge_delete(res, _diff['delete'])
_is_diff = True
if not _is_diff and not _old:
res = _diff
return res
def _legacy_assertions() -> None:
result = jay_diff_add({}, {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}
result = jay_diff_add({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'})
assert result == {}
result = jay_diff_add({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi', 'd': 'icecream'}, {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'})
assert result == {}
result = jay_diff_add({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'd': 'icecream', 'c': 'coke'})
assert result == {'d':'icecream'}
result = jay_diff_add({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'})
assert result == {'b':'fries'}
result = jay_diff_add({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}, {'c': {'f': 'coffee'}})
assert result == {'c': {'f': 'coffee'}}
result = jay_diff_add({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}})
assert result == {}
result = jay_diff_del({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'})
assert result == {'d':'icecream'}
result = jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'})
assert result == {}
result = jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'})
assert result == {}
result = jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'b': 'fries'})
assert result == {'c':'pepsi'}
result = jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'})
assert result == {}
result = jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a': 'hamburger', 'b': 'fries'})
assert result == {'c': None}
result = jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'e': 'coke'}})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'f': 'coffee'}}
result = jay_diff_del({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}})
assert result == {}
result = jay_diff_upd({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'potatoes'})
assert result == {'a':'hotdog', 'b':'potatoes'}
result = jay_diff_upd({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'e': 'pepsi'}})
assert result == {'c': {'e': 'pepsi'}}
result = jay_diff_upd({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'fries'})
assert result == {'a':'hotdog'}
result = jay_diff_upd({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'd': 'icecream', 'c': 'coke'})
assert result == {'c':'coke'}
result = jay_diff_upd({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'})
assert result == {'c':'coke'}
result = jay_diff_upd({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}, {'c': {'f': 'coffee'}})
assert result == {}
result = jay_diff_upd({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}})
assert result == {'c': {'e': 'pepsi'}}
# Update/add
result = jay_diff_upd_add({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'potatoes', 'd': 'icecream'})
assert result == {'a':'hotdog', 'b':'potatoes', 'd': 'icecream'}
result = jay_diff_upd_add({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}, 'b':'potatoes'})
assert result == {'b':'potatoes', 'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}}
result = jay_diff_upd_add({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'fries'})
assert result == {'a':'hotdog'}
result = jay_diff_upd_add({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}})
assert result == {'c': {'e': 'pepsi'}}
#####################
result = jay_diff_upd_add({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'potatoes'})
assert result == {'a':'hotdog', 'b':'potatoes'}
result = jay_diff_upd_add({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'e': 'pepsi'}})
assert result == {'c': {'e': 'pepsi'}}
result = jay_diff_upd_add({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'fries'})
assert result == {'a':'hotdog'}
result = jay_diff_upd_add({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'd': 'icecream', 'c': 'coke'})
assert result == {'c': 'coke', 'd': 'icecream'}
result = jay_diff_upd_add({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'})
assert result == {'b': 'fries', 'c': 'coke'}
result = jay_diff_upd_add({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}, {'c': {'f': 'coffee'}})
assert result == {'c': {'f': 'coffee'}}
result = jay_diff_upd_add({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}})
assert result == {'c': {'e': 'pepsi'}}
result = jay_diff_upd_add({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee', 'h': 'cake'}})
assert result == {'c': {'e': 'pepsi', 'h': 'cake'}}
# jay_diff_full
combine_upd_add = False
result = jay_diff_full({}, {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, combine_upd_add)
assert result == {'add': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, combine_upd_add)
assert result == {'update': {'c': 'coke'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi', 'd': 'icecream'}, {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, combine_upd_add)
assert result == {'delete': {'d': 'icecream'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'd': 'icecream', 'c': 'coke'}, combine_upd_add)
assert result == {'add': {'d': 'icecream'}, 'delete': {'b': 'fries'}, 'update': {'c': 'coke'}}
result = jay_diff_full({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, combine_upd_add)
assert result == {'add': {'b': 'fries'}, 'delete': {'d': 'icecream'}, 'update': {'c': 'coke'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}, {'c': {'f': 'coffee'}}, combine_upd_add)
assert result == {'add': {'c': {'f': 'coffee'}}, 'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}}
result = jay_diff_full({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, combine_upd_add)
assert result == {'add': {'b': 'fries'}, 'delete': {'d': 'icecream'}, 'update': {'c': 'coke'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, combine_upd_add)
assert result == {}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, combine_upd_add)
assert result == {'update': {'c': 'pepsi'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'b': 'fries'}, combine_upd_add)
assert result == {'delete': {'c': 'pepsi'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, combine_upd_add)
assert result == {'update': {'c': 'coke'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a': 'hamburger', 'b': 'fries'}, combine_upd_add)
assert result == {'delete': {'c': None}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}, combine_upd_add)
assert result == {'delete': {'c': {'e': 'coke'}}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'e': 'coke'}}, combine_upd_add)
assert result == {'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'potatoes'}, combine_upd_add)
assert result == {'delete': {'c': None}, 'update': {'a': 'hotdog', 'b': 'potatoes'}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'e': 'pepsi'}}, combine_upd_add)
assert result == {'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}, 'update': {'c': {'e': 'pepsi'}}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'fries'}, combine_upd_add)
assert result == {'delete': {'c': None}, 'update': {'a': 'hotdog'}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}}, combine_upd_add)
assert result == {'update': {'c': {'e': 'pepsi'}}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'potatoes', 'd': 'icecream'}, combine_upd_add)
assert result == {'add': {'d': 'icecream'}, 'delete': {'c': None}, 'update': {'a': 'hotdog', 'b': 'potatoes'}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}, 'b':'potatoes'}, combine_upd_add)
assert result == {'add': {'c': {'g': 'tea', 'h': 'cake'}}, 'delete': {'a': 'hamburger', 'c': {'f': 'coffee'}}, 'update': {'b': 'potatoes', 'c': {'e': 'pepsi'}}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'fries'}, combine_upd_add)
assert result == {'delete': {'c': None}, 'update': {'a': 'hotdog'}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}}, combine_upd_add)
assert result == {'update': {'c': {'e': 'pepsi'}}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee', 'h': 'cake'}}, combine_upd_add)
assert result == {'add': {'c': {'h': 'cake'}}, 'update': {'c': {'e': 'pepsi'}}}
# ToDo: jay_diff_full
combine_upd_add = True
result = jay_diff_full({}, {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, combine_upd_add)
assert result == {'update_add': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, combine_upd_add)
assert result == {'update_add': {'c': 'coke'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi', 'd': 'icecream'}, {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, combine_upd_add)
assert result == {'delete': {'d': 'icecream'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'd': 'icecream', 'c': 'coke'}, combine_upd_add)
assert result == {'delete': {'b': 'fries'}, 'update_add': {'c': 'coke', 'd': 'icecream'}}
result = jay_diff_full({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, combine_upd_add)
assert result == {'delete': {'d': 'icecream'}, 'update_add': {'b': 'fries', 'c': 'coke'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}, {'c': {'f': 'coffee'}}, combine_upd_add)
assert result == {'update_add': {'c': {'f': 'coffee'}}, 'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}}
result = jay_diff_full({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, combine_upd_add)
assert result == {'delete': {'d': 'icecream'}, 'update_add': {'b': 'fries', 'c': 'coke'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, combine_upd_add)
assert result == {}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, combine_upd_add)
assert result == {'update_add': {'c': 'pepsi'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'b': 'fries'}, combine_upd_add)
assert result == {'delete': {'c': 'pepsi'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, combine_upd_add)
assert result == {'update_add': {'c': 'coke'}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a': 'hamburger', 'b': 'fries'}, combine_upd_add)
assert result == {'delete': {'c': None}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}, combine_upd_add)
assert result == {'delete': {'c': {'e': 'coke'}}}
result = jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'e': 'coke'}}, combine_upd_add)
assert result == {'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'potatoes'}, combine_upd_add)
assert result == {'delete': {'c': None}, 'update_add': {'a': 'hotdog', 'b': 'potatoes'}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'e': 'pepsi'}}, combine_upd_add)
assert result == {'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}, 'update_add': {'c': {'e': 'pepsi'}}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'fries'}, combine_upd_add)
assert result == {'delete': {'c': None}, 'update_add': {'a': 'hotdog'}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}}, combine_upd_add)
assert result == {'update_add': {'c': {'e': 'pepsi'}}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'potatoes', 'd': 'icecream'}, combine_upd_add)
assert result == {'delete': {'c': None}, 'update_add': {'a': 'hotdog', 'b': 'potatoes', 'd': 'icecream'}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}, 'b':'potatoes'}, combine_upd_add)
assert result == {'delete': {'a': 'hamburger', 'c': {'f': 'coffee'}}, 'update_add': {'b': 'potatoes', 'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hotdog', 'b':'fries'}, combine_upd_add)
assert result == {'delete': {'c': None}, 'update_add': {'a': 'hotdog'}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}}, combine_upd_add)
assert result == {'update_add': {'c': {'e': 'pepsi'}}}
result = jay_diff_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee', 'h': 'cake'}}, combine_upd_add)
assert result == {'update_add': {'c': {'e': 'pepsi', 'h': 'cake'}}}
# Merge
result = jay_merge_add({}, {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}
result = jay_merge_add({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'d': 'icecream'})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}, 'd':'icecream'}
result = jay_merge_add({'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}, {'d': 'icecream'})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'f': 'coffee'}, 'd':'icecream'}
result = jay_merge_add({'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}, 'd': 'icecream'}, {'d': 'icecream'})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'f': 'coffee'}, 'd':'icecream'}
result = jay_merge_delete({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}, 'd': 'icecream'}, {'d': 'icecream'})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}
result = jay_merge_delete({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'f': 'coffee'}})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'e': 'coke'}}
result = jay_merge_delete({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'c': {'e': 'coke'}})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'f': 'coffee'}}
# jay_merge_full
# the no-jaydiff case
result = jay_merge_full({}, {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}
# combine_upd_add = False
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'add': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {'update': {'c': 'pepsi'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi', 'd': 'icecream'}, {'delete': {'d': 'icecream'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'add': {'d': 'icecream'}, 'delete': {'b': 'fries'}, 'update': {'c': 'coke'}})
assert result == {'a': 'hamburger', 'd': 'icecream', 'c': 'coke'}
result = jay_merge_full({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'add': {'b': 'fries'}, 'delete': {'d': 'icecream'}, 'update': {'c': 'coke'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}, {'add': {'c': {'f': 'coffee'}}, 'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}})
assert result == {'c': {'f': 'coffee'}}
result = jay_merge_full({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'add': {'b': 'fries'}, 'delete': {'d': 'icecream'}, 'update': {'c': 'coke'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {'update': {'c': 'pepsi'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'delete': {'c': 'pepsi'}})
assert result == {'a': 'hamburger', 'b': 'fries'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'update': {'c': 'coke'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'c': None}})
assert result == {'a': 'hamburger', 'b': 'fries'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'c': {'e': 'coke'}}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}})
assert result == {'c': {'e': 'coke'}}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'c': None}, 'update': {'a': 'hotdog', 'b': 'potatoes'}})
assert result == {'a':'hotdog', 'b':'potatoes'}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}, 'update': {'c': {'e': 'pepsi'}}})
assert result == {'c': {'e': 'pepsi'}}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'c': None}, 'update': {'a': 'hotdog'}})
assert result == {'a':'hotdog', 'b':'fries'}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'update': {'c': {'e': 'pepsi'}}})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'add': {'d': 'icecream'}, 'delete': {'c': None}, 'update': {'a': 'hotdog', 'b': 'potatoes'}})
assert result == {'a':'hotdog', 'b':'potatoes', 'd': 'icecream'}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'add': {'c': {'g': 'tea', 'h': 'cake'}}, 'delete': {'a': 'hamburger', 'c': {'f': 'coffee'}}, 'update': {'b': 'potatoes', 'c': {'e': 'pepsi'}}})
assert result == {'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}, 'b':'potatoes'}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'c': None}, 'update': {'a': 'hotdog'}})
assert result == {'a':'hotdog', 'b':'fries'}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'update': {'c': {'e': 'pepsi'}}})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'add': {'c': {'h': 'cake'}}, 'update': {'c': {'e': 'pepsi'}}})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee', 'h': 'cake'}}
# ToDo: jay_merge_full
# combine_upd_add = True
result = jay_merge_full({}, {'update_add': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'update_add': {'c': 'coke'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi', 'd': 'icecream'}, {'delete': {'d': 'icecream'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'delete': {'b': 'fries'}, 'update_add': {'c': 'coke', 'd': 'icecream'}})
assert result == {'a': 'hamburger', 'd': 'icecream', 'c': 'coke'}
result = jay_merge_full({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'delete': {'d': 'icecream'}, 'update_add': {'b': 'fries', 'c': 'coke'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}, {'update_add': {'c': {'f': 'coffee'}}, 'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}})
assert result == {'c': {'f': 'coffee'}}
result = jay_merge_full({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'}, {'delete': {'d': 'icecream'}, 'update_add': {'b': 'fries', 'c': 'coke'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {'update_add': {'c': 'pepsi'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'delete': {'c': 'pepsi'}})
assert result == {'a': 'hamburger', 'b': 'fries'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'update_add': {'c': 'coke'}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'c': None}})
assert result == {'a': 'hamburger', 'b': 'fries'}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'c': {'e': 'coke'}}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}})
assert result == {'c': {'e': 'coke'}}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'c': None}, 'update_add': {'a': 'hotdog', 'b': 'potatoes'}})
assert result == {'a':'hotdog', 'b':'potatoes'}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}, 'update_add': {'c': {'e': 'pepsi'}}})
assert result == {'c': {'e': 'pepsi'}}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'c': None}, 'update_add': {'a': 'hotdog'}})
assert result == {'a':'hotdog', 'b':'fries'}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'update_add': {'c': {'e': 'pepsi'}}})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'c': None}, 'update_add': {'a': 'hotdog', 'b': 'potatoes', 'd': 'icecream'}})
assert result == {'a':'hotdog', 'b':'potatoes', 'd': 'icecream'}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'a': 'hamburger', 'c': {'f': 'coffee'}}, 'update_add': {'b': 'potatoes', 'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}}})
assert result == {'b':'potatoes', 'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'delete': {'c': None}, 'update_add': {'a': 'hotdog'}})
assert result == {'a':'hotdog', 'b':'fries'}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'update_add': {'c': {'e': 'pepsi'}}})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}}
result = jay_merge_full({'a':'hamburger', 'b':'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, {'update_add': {'c': {'e': 'pepsi', 'h': 'cake'}}})
assert result == {'a':'hamburger', 'b':'fries', 'c': {'e': 'pepsi', 'f': 'coffee', 'h': 'cake'}}
result = jay_merge_full({}, {'add': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}
result = jay_merge_full({}, {'add': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': {'coffee': {'h': 'black'}}}}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': {'coffee': {'h': 'black'}}}}
result = jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': {'coffee': {'h': 'black'}}}}, {'add': {'c': {'f': {'coffee': {'j': 'sugar'}}}}})
assert result == {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': {'coffee': {'h': 'black', 'j': 'sugar'}}}}
old = {'charging': {
'batteryStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:34Z', 'cruisingRangeElectric_km': 192}},
'chargingStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:34Z'}},
'chargingSettings': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:30Z'}},
'plugStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:29Z'}}}}
update = {'charging': {
'batteryStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:35:46Z', 'cruisingRangeElectric_km': 191}},
'chargingStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:35:46Z'}}}}
add = {'charging': {
'batteryStatus': {'value': {'currentSOC_pct': 55}}},
'fuelStatus': {'rangeStatus': {'value': {'primaryEngine': {'currentSOC_pct': 55}}}},
'measurements': {'fuelLevelStatus': {'value': {'currentSOC_pct': 55}}}}
delete = {'charging': {
'chargingSettings': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:30Z'}},
'plugStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:29Z'}}}}
result = jay_merge_full(old, {'update':update, 'add':add, 'delete':delete})
assert result == old
if __name__ == '__main__':
_legacy_assertions()
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{
"meta": {
"vin": "WVWZZZE1ZMP010760",
"created_at": "2026-05-26T11:37:05.156831+00:00",
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}
File diff suppressed because it is too large Load Diff
File diff suppressed because it is too large Load Diff
@@ -0,0 +1,485 @@
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"unit": "degC"
}
}
},
"vehicle": {
"vehicle": {
"state": "unknown vehicle state"
}
},
"connectivity": {
"connection": {
"state": "reachable"
}
},
"climatisation": {
"climatisationStatus": {
"climatisationState": "off",
"remainingClimatisationTime": {
"value": 0,
"unit": "min"
}
},
"climatisationSettings": {
"targetTemperature": {
"value": 21.0,
"unit": "degC"
}
}
},
"position": {
"position": {
"lat": null,
"lon": null
}
},
"doors": {
"doors": {
"overallState": "None",
"doors": {},
"windows": {}
}
},
"procedural": {
"range_at_100": {
"value": 360.3,
"unit": "km"
}
}
}
]
}
@@ -0,0 +1,130 @@
{
"meta": {
"vin": "WVWZZZE1ZMP010760",
"created_at": "2026-05-27T06:21:01.933728+00:00",
"interval_seconds": 30
},
"records": [
{
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"unit": "km"
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"unit": "degC"
},
"temperatureHvBatteryMin": {
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"unit": "degC"
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},
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"unit": "degC"
}
}
},
"vehicle": {
"vehicle": {
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},
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}
},
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}
},
"climatisationSettings": {
"targetTemperature": {
"value": 21.0,
"unit": "degC"
}
}
},
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},
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"value": 360.3,
"unit": "km"
}
}
}
]
}
@@ -0,0 +1,130 @@
{
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"vin": "WVWZZZE1ZMP010760",
"created_at": "2026-05-27T06:33:08.561803+00:00",
"interval_seconds": 30
},
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{
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"unit": "%"
},
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"unit": "km"
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},
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"targetSOC": {
"value": 80.0,
"unit": "%"
},
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"unit": "A"
},
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},
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"value": 295.15,
"unit": "degC"
},
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"value": 294.15,
"unit": "degC"
}
}
},
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"odometer": {
"value": 67489.0,
"unit": "km"
}
},
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"temperature_outside": {
"value": null,
"unit": "degC"
}
}
},
"vehicle": {
"vehicle": {
"state": "unknown vehicle state"
}
},
"connectivity": {
"connectivity": {
"state": "reachable"
}
},
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"climatisationStatus": {
"climatisationState": "off",
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"value": 0,
"unit": "min"
}
},
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"lon": null
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},
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}
}
}
]
}
File diff suppressed because it is too large Load Diff
File diff suppressed because it is too large Load Diff
@@ -0,0 +1,627 @@
{
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"created_at": "2026-05-27T09:31:50.175248+00:00",
"interval_seconds": 30
},
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{
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},
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},
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},
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},
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},
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},
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}
},
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}
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},
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}
}
},
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},
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}
},
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"unit": "km"
}
}
},
{
"ts": "2026-05-27T09:32:20.484182+00:00",
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},
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},
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"unit": "A"
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}
},
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},
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"unit": "%"
},
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"value": 295.15,
"unit": "degC"
},
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"value": 294.15,
"unit": "degC"
}
},
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"odometer": {
"value": 67489.0,
"unit": "km"
}
}
},
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"state": "unknown vehicle state"
},
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},
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},
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}
}
},
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},
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}
}
},
{
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"unit": "kW"
},
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"unit": "min"
},
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"target_level": {
"value": 80.0,
"unit": "%"
},
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"value": 16.0,
"unit": "A"
},
"auto_unlock": "False"
},
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"connection_state": "disconnected",
"lock_state": "unlocked",
"external_power": "unavailable"
}
},
"electric_drive": {
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"unit": "km"
},
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"value": 360.3,
"unit": "km"
},
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"unit": "degC"
},
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"unit": "degC"
}
},
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"odometer": {
"value": 67489.0,
"unit": "km"
}
}
},
"vehicle": {
"state": "unknown vehicle state"
},
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"state": "reachable"
},
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"state": "off",
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},
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"target_temperature": {
"value": 21.0,
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}
},
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"value": null,
"unit": "degC"
}
}
},
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"lat": null,
"lon": null
},
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"doors": {
"overallState": "None",
"doors": {},
"windows": {}
}
},
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"value": 360.3,
"unit": "km"
}
}
},
{
"ts": "2026-05-27T09:33:20.808989+00:00",
"charging": {
"state": "off",
"type": "invalid",
"power": {
"value": 0.0,
"unit": "kW"
},
"remain": {
"value": 0,
"unit": "min"
},
"settings": {
"target_level": {
"value": 80.0,
"unit": "%"
},
"maximum_current": {
"value": 16.0,
"unit": "A"
},
"auto_unlock": "False"
},
"plugStatus": {
"connection_state": "disconnected",
"lock_state": "unlocked",
"external_power": "unavailable"
}
},
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"range": {
"value": 209.0,
"unit": "km"
},
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"value": 360.3,
"unit": "km"
},
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"value": 58.0,
"unit": "%"
},
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"value": 295.15,
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},
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}
},
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"unit": "km"
}
}
},
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"state": "unknown vehicle state"
},
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"state": "reachable"
},
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"unit": "min"
},
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"value": 21.0,
"unit": "degC"
}
},
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"value": null,
"unit": "degC"
}
}
},
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"lon": null
},
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"doors": {
"overallState": "None",
"doors": {},
"windows": {}
}
},
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"range_at_100": {
"value": 360.3,
"unit": "km"
}
}
},
{
"ts": "2026-05-27T09:33:50.960434+00:00",
"charging": {
"state": "off",
"type": "invalid",
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"value": 0.0,
"unit": "kW"
},
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"value": 0,
"unit": "min"
},
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"value": 80.0,
"unit": "%"
},
"maximum_current": {
"value": 16.0,
"unit": "A"
},
"auto_unlock": "False"
},
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"connection_state": "disconnected",
"lock_state": "unlocked",
"external_power": "unavailable"
}
},
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"range": {
"value": 209.0,
"unit": "km"
},
"range_full": {
"value": 360.3,
"unit": "km"
},
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"soc": {
"value": 58.0,
"unit": "%"
},
"temperature_max": {
"value": 295.15,
"unit": "degC"
},
"temperature_min": {
"value": 294.15,
"unit": "degC"
}
},
"odometer": {
"odometer": {
"value": 67489.0,
"unit": "km"
}
}
},
"vehicle": {
"state": "unknown vehicle state"
},
"connectivity": {
"state": "reachable"
},
"climatisation": {
"state": "off",
"remain": {
"value": 0,
"unit": "min"
},
"settings": {
"target_temperature": {
"value": 21.0,
"unit": "degC"
}
},
"environment": {
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"value": null,
"unit": "degC"
}
}
},
"position": {
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"lon": null
},
"doors": {
"doors": {
"overallState": "None",
"doors": {},
"windows": {}
}
},
"procedural": {
"range_at_100": {
"value": 360.3,
"unit": "km"
}
}
},
{
"ts": "2026-05-27T09:34:21.107584+00:00",
"charging": {
"state": "off",
"type": "invalid",
"power": {
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"unit": "kW"
},
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"unit": "min"
},
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"target_level": {
"value": 80.0,
"unit": "%"
},
"maximum_current": {
"value": 16.0,
"unit": "A"
},
"auto_unlock": "False"
},
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"connection_state": "disconnected",
"lock_state": "unlocked",
"external_power": "unavailable"
}
},
"electric_drive": {
"range": {
"value": 209.0,
"unit": "km"
},
"range_full": {
"value": 360.3,
"unit": "km"
},
"battery": {
"soc": {
"value": 58.0,
"unit": "%"
},
"temperature_max": {
"value": 295.15,
"unit": "degC"
},
"temperature_min": {
"value": 294.15,
"unit": "degC"
}
},
"odometer": {
"odometer": {
"value": 67489.0,
"unit": "km"
}
}
},
"vehicle": {
"state": "unknown vehicle state"
},
"connectivity": {
"state": "reachable"
},
"climatisation": {
"state": "off",
"remain": {
"value": 0,
"unit": "min"
},
"settings": {
"target_temperature": {
"value": 21.0,
"unit": "degC"
}
},
"environment": {
"temperature_outside": {
"value": null,
"unit": "degC"
}
}
},
"position": {
"lat": null,
"lon": null
},
"doors": {
"doors": {
"overallState": "None",
"doors": {},
"windows": {}
}
},
"procedural": {
"range_at_100": {
"value": 360.3,
"unit": "km"
}
}
}
]
}
File diff suppressed because it is too large Load Diff
+532
View File
@@ -0,0 +1,532 @@
"""Tests for jay_diff."""
import pytest
from copy import deepcopy
from jay_diff import (
jay_diff_add, jay_diff_del, jay_diff_upd, jay_diff_upd_add,
jay_diff_full, jay_merge_add, jay_merge_delete, jay_merge_update, jay_merge_full,
)
# ── jay_diff_add ──────────────────────────────────────────────────────────────
class TestJayDiffAdd:
def test_add_to_empty(self):
assert jay_diff_add({}, {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}) \
== {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}
def test_no_new_keys(self):
assert jay_diff_add({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'},
{'a': 'hamburger', 'b': 'fries', 'c': 'coke'}) == {}
def test_old_has_extra_keys(self):
assert jay_diff_add({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi', 'd': 'icecream'},
{'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}) == {}
def test_one_new_key(self):
assert jay_diff_add({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'},
{'a': 'hamburger', 'd': 'icecream', 'c': 'coke'}) == {'d': 'icecream'}
def test_new_key_among_overlap(self):
assert jay_diff_add({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'},
{'a': 'hamburger', 'b': 'fries', 'c': 'coke'}) == {'b': 'fries'}
def test_nested_new_key(self):
assert jay_diff_add({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}},
{'c': {'f': 'coffee'}}) == {'c': {'f': 'coffee'}}
def test_nested_no_new_keys(self):
assert jay_diff_add({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}) == {}
# ── jay_diff_del ──────────────────────────────────────────────────────────────
class TestJayDiffDel:
def test_one_deleted_key(self):
assert jay_diff_del({'a': 'hamburger', 'c': 'pepsi', 'd': 'icecream'},
{'a': 'hamburger', 'b': 'fries', 'c': 'coke'}) == {'d': 'icecream'}
def test_no_deleted_keys_same_values(self):
assert jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': 'coke'},
{'a': 'hamburger', 'b': 'fries', 'c': 'coke'}) == {}
def test_no_deleted_keys_different_values(self):
assert jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': 'coke'},
{'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}) == {}
def test_key_absent_from_new(self):
assert jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'},
{'a': 'hamburger', 'b': 'fries'}) == {'c': 'pepsi'}
def test_nested_deleted_key(self):
# 'c' is absent from _new → None signals "delete entire key"
assert jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hamburger', 'b': 'fries'}) == {'c': None}
def test_nested_partial_delete(self):
assert jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'c': {'e': 'coke'}}) == {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}
def test_nested_no_delete_different_value(self):
assert jay_diff_del({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hamburger', 'b': 'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}}) == {}
# ── jay_diff_upd ──────────────────────────────────────────────────────────────
class TestJayDiffUpd:
def test_multiple_updates(self):
assert jay_diff_upd({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hotdog', 'b': 'potatoes'}) == {'a': 'hotdog', 'b': 'potatoes'}
def test_nested_update(self):
assert jay_diff_upd({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'c': {'e': 'pepsi'}}) == {'c': {'e': 'pepsi'}}
def test_one_update(self):
assert jay_diff_upd({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hotdog', 'b': 'fries'}) == {'a': 'hotdog'}
def test_no_update_new_key_ignored(self):
assert jay_diff_upd({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'},
{'a': 'hamburger', 'd': 'icecream', 'c': 'coke'}) == {'c': 'coke'}
def test_nested_no_update_new_subkey_ignored(self):
assert jay_diff_upd({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}},
{'c': {'f': 'coffee'}}) == {}
def test_nested_update_one_of_two(self):
assert jay_diff_upd({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hamburger', 'b': 'fries', 'c': {'e': 'pepsi', 'f': 'coffee'}}) \
== {'c': {'e': 'pepsi'}}
# ── jay_diff_upd_add ──────────────────────────────────────────────────────────
class TestJayDiffUpdAdd:
def test_update_and_add(self):
assert jay_diff_upd_add({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hotdog', 'b': 'potatoes', 'd': 'icecream'}) \
== {'a': 'hotdog', 'b': 'potatoes', 'd': 'icecream'}
def test_nested_update_and_add(self):
assert jay_diff_upd_add({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}, 'b': 'potatoes'}) \
== {'b': 'potatoes', 'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}}
def test_update_only(self):
assert jay_diff_upd_add({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hotdog', 'b': 'fries'}) == {'a': 'hotdog'}
def test_nested_update_and_new_subkey(self):
assert jay_diff_upd_add({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hamburger', 'b': 'fries', 'c': {'e': 'pepsi', 'f': 'coffee', 'h': 'cake'}}) \
== {'c': {'e': 'pepsi', 'h': 'cake'}}
def test_add_new_top_and_update(self):
assert jay_diff_upd_add({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'},
{'a': 'hamburger', 'd': 'icecream', 'c': 'coke'}) \
== {'c': 'coke', 'd': 'icecream'}
def test_identical(self):
assert jay_diff_upd_add({'a': 'hamburger', 'b': 'fries'},
{'a': 'hamburger', 'b': 'fries'}) == {}
# ── jay_diff_full (combine_upd_add=False) ─────────────────────────────────────
class TestJayDiffFullSeparate:
F = False
def test_add_all(self):
assert jay_diff_full({}, {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, self.F) \
== {'add': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}}
def test_update_one(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'},
{'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, self.F) \
== {'update': {'c': 'coke'}}
def test_delete_one(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi', 'd': 'icecream'},
{'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, self.F) \
== {'delete': {'d': 'icecream'}}
def test_add_delete_update(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'},
{'a': 'hamburger', 'd': 'icecream', 'c': 'coke'}, self.F) \
== {'add': {'d': 'icecream'}, 'delete': {'b': 'fries'}, 'update': {'c': 'coke'}}
def test_identical(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'},
{'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, self.F) == {}
def test_delete_nested(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hamburger', 'b': 'fries'}, self.F) \
== {'delete': {'c': None}}
def test_nested_partial_delete(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}, self.F) \
== {'delete': {'c': {'e': 'coke'}}}
def test_update_and_delete(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hotdog', 'b': 'potatoes'}, self.F) \
== {'delete': {'c': None}, 'update': {'a': 'hotdog', 'b': 'potatoes'}}
def test_nested_add_delete_update(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hotdog', 'b': 'potatoes', 'd': 'icecream'}, self.F) \
== {'add': {'d': 'icecream'}, 'delete': {'c': None}, 'update': {'a': 'hotdog', 'b': 'potatoes'}}
# ── jay_diff_full (combine_upd_add=True) ──────────────────────────────────────
class TestJayDiffFullCombined:
T = True
def test_add_all(self):
assert jay_diff_full({}, {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}, self.T) \
== {'update_add': {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}}
def test_update_one(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'},
{'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, self.T) \
== {'update_add': {'c': 'coke'}}
def test_delete_one(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi', 'd': 'icecream'},
{'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, self.T) \
== {'delete': {'d': 'icecream'}}
def test_delete_and_update_add(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'},
{'a': 'hamburger', 'd': 'icecream', 'c': 'coke'}, self.T) \
== {'delete': {'b': 'fries'}, 'update_add': {'c': 'coke', 'd': 'icecream'}}
def test_identical(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'},
{'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, self.T) == {}
def test_delete_nested(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hamburger', 'b': 'fries'}, self.T) \
== {'delete': {'c': None}}
def test_update_and_delete_nested(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hotdog', 'b': 'potatoes'}, self.T) \
== {'delete': {'c': None}, 'update_add': {'a': 'hotdog', 'b': 'potatoes'}}
def test_nested_update_add_and_delete(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}, 'b': 'potatoes'}, self.T) \
== {'delete': {'a': 'hamburger', 'c': {'f': 'coffee'}},
'update_add': {'b': 'potatoes', 'c': {'e': 'pepsi', 'g': 'tea', 'h': 'cake'}}}
def test_nested_add_subkey(self):
assert jay_diff_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'a': 'hamburger', 'b': 'fries', 'c': {'e': 'pepsi', 'f': 'coffee', 'h': 'cake'}}, self.T) \
== {'update_add': {'c': {'e': 'pepsi', 'h': 'cake'}}}
# ── jay_merge_* ───────────────────────────────────────────────────────────────
class TestJayMerge:
def test_merge_add_to_empty(self):
assert jay_merge_add({}, {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}) \
== {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}
def test_merge_add_new_key(self):
assert jay_merge_add({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'d': 'icecream'}) \
== {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}, 'd': 'icecream'}
def test_merge_add_existing_unchanged(self):
assert jay_merge_add({'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}, 'd': 'icecream'},
{'d': 'icecream'}) \
== {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}, 'd': 'icecream'}
def test_merge_delete_top_key(self):
assert jay_merge_delete({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}, 'd': 'icecream'},
{'d': 'icecream'}) \
== {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}
def test_merge_delete_nested_key(self):
assert jay_merge_delete({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'c': {'f': 'coffee'}}) \
== {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke'}}
def test_merge_delete_nested_leaves_sibling(self):
assert jay_merge_delete({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'c': {'e': 'coke'}}) \
== {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}}
class TestJayMergeFull:
def test_passthrough_when_old_empty(self):
assert jay_merge_full({}, {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}) \
== {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}}
def test_empty_diff_unchanged(self):
assert jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {}) \
== {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}
def test_update(self):
assert jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'coke'}, {'update': {'c': 'pepsi'}}) \
== {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}
def test_update_add(self):
assert jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}, {'update_add': {'c': 'coke'}}) \
== {'a': 'hamburger', 'b': 'fries', 'c': 'coke'}
def test_delete(self):
assert jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi', 'd': 'icecream'},
{'delete': {'d': 'icecream'}}) \
== {'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'}
def test_add_delete_update_combined(self):
assert jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': 'pepsi'},
{'add': {'d': 'icecream'}, 'delete': {'b': 'fries'}, 'update': {'c': 'coke'}}) \
== {'a': 'hamburger', 'd': 'icecream', 'c': 'coke'}
def test_nested_update_and_delete(self):
assert jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'delete': {'a': 'hamburger', 'b': 'fries', 'c': {'f': 'coffee'}},
'update': {'c': {'e': 'pepsi'}}}) \
== {'c': {'e': 'pepsi'}}
def test_update_add_new_subkey(self):
assert jay_merge_full({'a': 'hamburger', 'b': 'fries', 'c': {'e': 'coke', 'f': 'coffee'}},
{'update_add': {'c': {'e': 'pepsi', 'h': 'cake'}}}) \
== {'a': 'hamburger', 'b': 'fries', 'c': {'e': 'pepsi', 'f': 'coffee', 'h': 'cake'}}
def test_real_world_snapshot_update(self):
old = {'charging': {
'batteryStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:34Z', 'cruisingRangeElectric_km': 192}},
'chargingStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:34Z'}},
'chargingSettings': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:30Z'}},
'plugStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:29Z'}}}}
update = {'charging': {
'batteryStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:35:46Z', 'cruisingRangeElectric_km': 191}},
'chargingStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:35:46Z'}}}}
add = {'charging': {'batteryStatus': {'value': {'currentSOC_pct': 55}}},
'fuelStatus': {'rangeStatus': {'value': {'primaryEngine': {'currentSOC_pct': 55}}}},
'measurements': {'fuelLevelStatus': {'value': {'currentSOC_pct': 55}}}}
delete = {'charging': {
'chargingSettings': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:30Z'}},
'plugStatus': {'value': {'carCapturedTimestamp': '2024-10-19T05:34:29Z'}}}}
result = jay_merge_full(old, {'update': update, 'add': add, 'delete': delete})
assert result == old
# ── Corner cases: data types ───────────────────────────────────────────────────
class TestNumericAndScalarTypes:
def test_diff_int_value_changed(self):
assert jay_diff_upd({'a': 1, 'b': 2}, {'a': 1, 'b': 3}) == {'b': 3}
def test_diff_float_value_changed(self):
assert jay_diff_upd({'a': 1.0}, {'a': 1.1}) == {'a': 1.1}
def test_diff_int_unchanged(self):
assert jay_diff_upd({'a': 42}, {'a': 42}) == {}
def test_diff_bool_changed(self):
assert jay_diff_upd({'a': True}, {'a': False}) == {'a': False}
def test_diff_bool_false_to_true(self):
assert jay_diff_upd({'online': False}, {'online': True}) == {'online': True}
def test_diff_none_value_changed(self):
assert jay_diff_upd({'a': None}, {'a': 'something'}) == {'a': 'something'}
def test_diff_value_to_none(self):
assert jay_diff_upd({'a': 'something'}, {'a': None}) == {'a': None}
def test_diff_list_unchanged(self):
assert jay_diff_upd({'a': [1, 2, 3]}, {'a': [1, 2, 3]}) == {}
def test_diff_list_changed(self):
assert jay_diff_upd({'a': [1, 2]}, {'a': [1, 2, 3]}) == {'a': [1, 2, 3]}
def test_add_numeric_key(self):
assert jay_diff_add({'a': 1}, {'a': 1, 'b': 2}) == {'b': 2}
def test_full_combined_numeric(self):
old = {'soc': 80, 'range': 300, 'temp': 22.5}
new = {'soc': 75, 'range': 280, 'temp': 22.5}
diff = jay_diff_full(old, new)
assert diff == {'update_add': {'soc': 75, 'range': 280}}
def test_merge_numeric_update(self):
assert jay_merge_full({'soc': 80, 'range': 300}, {'update_add': {'soc': 75}}) \
== {'soc': 75, 'range': 300}
# ── Corner cases: type changes (dict ↔ scalar) ────────────────────────────────
class TestTypeChanges:
def test_dict_replaced_by_scalar_in_diff(self):
# A key that was a dict becomes a scalar — upd treats the whole value as changed
old = {'a': {'b': 'c'}}
new = {'a': 'flat'}
diff = jay_diff_upd(old, new)
assert diff == {'a': 'flat'}
def test_merge_dict_to_scalar(self):
old = {'a': {'b': 'c'}, 'x': 1}
diff = {'update_add': {'a': 'flat'}}
result = jay_merge_full(old, diff)
assert result == {'a': 'flat', 'x': 1}
def test_diff_full_dict_to_scalar_combined(self):
old = {'status': {'value': 42}}
new = {'status': 'unknown'}
diff = jay_diff_full(old, new)
result = jay_merge_full(deepcopy(old), diff)
assert result == new
def test_diff_add_new_nested_structure(self):
# Key absent in old, present as dict in new — treated as addition
old = {'a': 1}
new = {'a': 1, 'b': {'c': 2}}
diff = jay_diff_add(old, new)
assert diff == {'b': {'c': 2}}
# ── Corner cases: completely different structures ─────────────────────────────
class TestCompletelyDifferentStructure:
def test_all_keys_replaced(self):
old = {'a': 1, 'b': 2}
new = {'x': 10, 'y': 20}
diff = jay_diff_full(old, new)
assert diff == {'update_add': {'x': 10, 'y': 20}, 'delete': {'a': 1, 'b': 2}}
def test_all_keys_replaced_deep(self):
old = {'charging': {'state': 'charging', 'power': 11}}
new = {'electric_drive': {'range': 300, 'soc': 80}}
diff = jay_diff_full(old, new)
assert diff == {
'update_add': {'electric_drive': {'range': 300, 'soc': 80}},
'delete': {'charging': None},
}
def test_merge_round_trip_all_keys_replaced(self):
old = {'a': 1, 'b': 2}
new = {'x': 10, 'y': 20}
diff = jay_diff_full(old, new)
result = jay_merge_full(deepcopy(old), diff)
assert result == new
def test_diff_disjoint_no_update(self):
# No shared keys → no updates, only add/delete
old = {'a': 1}
new = {'b': 2}
diff = jay_diff_upd(old, new)
assert diff == {}
def test_diff_disjoint_add(self):
assert jay_diff_add({'a': 1}, {'b': 2}) == {'b': 2}
def test_diff_disjoint_del(self):
assert jay_diff_del({'a': 1}, {'b': 2}) == {'a': 1}
# ── Corner cases: empty containers ────────────────────────────────────────────
class TestEmptyContainers:
def test_diff_both_empty(self):
assert jay_diff_full({}, {}) == {}
def test_diff_old_empty_new_has_data(self):
diff = jay_diff_full({}, {'a': 1})
assert diff == {'update_add': {'a': 1}}
def test_diff_new_empty_old_has_data(self):
diff = jay_diff_full({'a': 1}, {})
assert diff == {'delete': {'a': 1}}
def test_merge_delete_all_keys(self):
result = jay_merge_full({'a': 1, 'b': 2}, {'delete': {'a': 1, 'b': 2}})
assert result == {}
def test_delete_empty_dict_value(self):
# Deleting a key whose value is {} — should not recurse (fixed bug)
result = jay_merge_delete({'a': 'keep', 'b': {}}, {'b': {}})
assert result == {'a': 'keep'}
def test_diff_nested_empty_dict(self):
old = {'a': {'b': 'c'}}
new = {'a': {}}
diff = jay_diff_del(old, new)
assert diff == {'a': {'b': 'c'}}
def test_empty_dict_preserved_after_delete_all_subkeys(self):
# When new has an empty dict at a location, the key must survive with {}
# (not be pruned away). This would break if merge incorrectly prunes empty dicts.
old = {'x': {'p': 1, 'q': 2}}
new = {'x': {}}
diff = jay_diff_full(old, new)
result = jay_merge_full(deepcopy(old), diff)
assert result == new # 'x' must remain as {}
# ── Corner cases: deep nesting ────────────────────────────────────────────────
class TestDeepNesting:
def test_diff_three_levels(self):
old = {'l1': {'l2': {'l3': 'old'}}}
new = {'l1': {'l2': {'l3': 'new'}}}
assert jay_diff_upd(old, new) == {'l1': {'l2': {'l3': 'new'}}}
def test_merge_three_levels(self):
old = {'l1': {'l2': {'l3': 'old', 'keep': 'yes'}}}
diff = {'update_add': {'l1': {'l2': {'l3': 'new'}}}}
result = jay_merge_full(deepcopy(old), diff)
assert result == {'l1': {'l2': {'l3': 'new', 'keep': 'yes'}}}
def test_diff_full_three_levels(self):
old = {'a': {'b': {'c': {'d': 'deep'}}}}
new = {'a': {'b': {'c': {'d': 'deeper'}}}}
diff = jay_diff_full(old, new)
result = jay_merge_full(deepcopy(old), diff)
assert result == new
# ── Round-trip: merge(old, diff(old, new)) == new ────────────────────────────
class TestRoundTrip:
"""Verify that applying a diff to old always produces new."""
@pytest.mark.parametrize("old,new", [
({'a': 1}, {'a': 2}),
({'a': 1, 'b': 2}, {'b': 3, 'c': 4}),
({'x': {'y': 'old'}}, {'x': {'y': 'new', 'z': 'added'}}),
({'a': {'b': 1}, 'c': 2}, {'a': {'b': 1}, 'd': 3}),
({'soc': 80, 'range': 300}, {'soc': 60, 'range': 240, 'temp': 25}),
({'a': True, 'b': None}, {'a': False, 'c': 42}),
({'l1': {'l2': {'v': 1}}}, {'l1': {'l2': {'v': 2}}}),
({}, {'a': 1}),
({'a': 1}, {}),
])
def test_round_trip_combined(self, old, new):
diff = jay_diff_full(deepcopy(old), deepcopy(new), combine_upd_add=True)
result = jay_merge_full(deepcopy(old), diff)
assert result == new
@pytest.mark.parametrize("old,new", [
({'a': 1}, {'a': 2}),
({'a': 1, 'b': 2}, {'b': 3, 'c': 4}),
({'x': {'y': 'old'}}, {'x': {'y': 'new', 'z': 'added'}}),
({}, {'a': 1}),
({'a': 1}, {}),
])
def test_round_trip_separate(self, old, new):
diff = jay_diff_full(deepcopy(old), deepcopy(new), combine_upd_add=False)
result = jay_merge_full(deepcopy(old), diff)
assert result == new
+93
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"""
Round-trip tests for jay_diff using real snapshot records from ./tests/data/.
For every pair of consecutive records (within a file and across adjacent files)
we verify:
jay_merge_full(a, jay_diff_full(a, b)) == b
We also verify that diffing identical records produces an empty diff, and that
applying an empty diff is a no-op.
"""
import json
import pathlib
import pytest
from jay_diff import jay_diff_full, jay_merge_full
DATA_DIR = pathlib.Path(__file__).parent / "data"
def _load_all_records() -> list[dict]:
"""Return all records from all data files, sorted by timestamp."""
records: list[dict] = []
for path in sorted(DATA_DIR.glob("*.json")):
store = json.loads(path.read_text())
records.extend(store.get("records", []))
records.sort(key=lambda r: r.get("ts", ""))
return records
ALL_RECORDS = _load_all_records()
CONSECUTIVE_PAIRS = list(zip(ALL_RECORDS, ALL_RECORDS[1:]))
class TestRealDataRoundTrip:
"""Diff+merge of every consecutive snapshot pair must reconstruct the target."""
@pytest.mark.parametrize("pair_index", range(len(CONSECUTIVE_PAIRS)))
def test_consecutive_round_trip(self, pair_index: int) -> None:
a, b = CONSECUTIVE_PAIRS[pair_index]
diff = jay_diff_full(a, b)
result = jay_merge_full(a, diff)
assert result == b, (
f"Round-trip failed for pair #{pair_index} "
f"(ts: {a.get('ts')}{b.get('ts')})"
)
@pytest.mark.parametrize("pair_index", range(len(CONSECUTIVE_PAIRS)))
def test_diff_of_identical_is_empty(self, pair_index: int) -> None:
a, _ = CONSECUTIVE_PAIRS[pair_index]
assert jay_diff_full(a, a) == {}
@pytest.mark.parametrize("pair_index", range(len(CONSECUTIVE_PAIRS)))
def test_empty_diff_is_noop(self, pair_index: int) -> None:
a, _ = CONSECUTIVE_PAIRS[pair_index]
assert jay_merge_full(a, {}) == a
class TestRealDataProperties:
"""Structural invariants on the real snapshot data."""
def test_data_dir_has_files(self) -> None:
assert len(list(DATA_DIR.glob("*.json"))) > 0, "No JSON files in tests/data/"
def test_all_records_have_timestamp(self) -> None:
for rec in ALL_RECORDS:
assert "ts" in rec, f"Record missing 'ts': {list(rec.keys())}"
def test_records_are_sorted(self) -> None:
ts_list = [r["ts"] for r in ALL_RECORDS]
assert ts_list == sorted(ts_list), "Records are not in ascending timestamp order"
def test_total_record_count(self) -> None:
assert len(ALL_RECORDS) > 100, (
f"Expected >100 records across all files, got {len(ALL_RECORDS)}"
)
def test_diff_size_smaller_than_full_snapshot(self) -> None:
"""Diffs between similar consecutive records should usually be smaller."""
savings = 0
for a, b in CONSECUTIVE_PAIRS:
diff = jay_diff_full(a, b)
if diff: # skip identical pairs
diff_len = len(json.dumps(diff))
full_len = len(json.dumps(b))
if diff_len < full_len:
savings += 1
ratio = savings / len(CONSECUTIVE_PAIRS) if CONSECUTIVE_PAIRS else 1.0
assert ratio > 0.5, (
f"Expected diffs to be smaller than full snapshots for >50% of pairs, "
f"got {ratio:.0%}"
)