Files
autocad-mcp-pro/tests/test_drawing_properties.py
T
Umut CANandClaude Opus 5 4fe2d963c0 fix(task-16): custom keys mirror AutoCAD's full AddCustomInfo rule, deletes are exempt, keys match case-insensitively
The 2b9791f fix mirrored only the characters the first review happened to
measure ('=' and ';'), so `custom={'AAA': 'first', 'A:B': 'x', 'ZZZ': 'never'}`
still raised from AddCustomInfo('A:B') on the live engine after subject and
AAA were applied -- the same half-write for 11 other keys. Re-measured on
AutoCAD 2026 by sweeping every character 0x20-0x7E through a scratch
document: exactly thirteen printable characters are 'Invalid key' anywhere
in a key (" * , / : ; < = > ? \ ` |); control characters, internal spaces,
a no-break space and unicode are accepted; leading/trailing whitespace
(space, tab, NBSP) is refused. `_CUSTOM_KEY_FORBIDDEN` is now that set,
the internal-NBSP refusal (wrong: measured accepted) is gone, and the
validator / tool docstrings state the measured rule instead of a closed
enumeration that was false.

A delete (`{key: None}`) is exempt from the AddCustomInfo syntax rules:
RemoveCustomByKey never validates syntax (measured: 'Key not found', never
'Invalid key'), and 2b9791f ran the check before the None branch, so a key
an ezdxf script wrote ('A=B', ' PAD ') showed in drawing_properties_get and
could never be removed. The line-break rule still applies both ways.

Also measured: custom keys are case-insensitive in AutoCAD (AddCustomInfo
over an existing case-variant is 'Duplicate key'; SetCustomByKey and
RemoveCustomByKey match either spelling and keep the stored one). The COM
routing was case-sensitive, so `{'PROJECT': ...}` over 'Project' went to
AddCustomInfo and failed mid-write -- the same class. Both engines now
match existing keys casefolded (update in place under the stored spelling,
never a second tag), and a request naming two case-variants is refused.

Tests: parametrized validator sweep over all thirteen characters, the
accepted set (control chars, NBSP, unicode, the other printables), the
delete exemption headlessly on a DXF carrying such keys and on the fake
SummaryInfo, case-variant refusal, and case-insensitive routing against a
fake that raises 'Duplicate key' / 'Key not found' like AutoCAD. Confirmed
live through the real ComBackend on a scratch document (Close(False)).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
2026-09-21 21:37:44 +03:00

545 lines
24 KiB
Python

"""drawing_properties_get / set: DWG summary and custom properties on both engines.
Headlessly the five summary fields live in the DWG SummaryInfo stream, which
ezdxf cannot write, so any non-null summary field is refused with
`capability: dwgprops` before anything is touched; custom properties are
`$CUSTOMPROPERTYTAG` / `$CUSTOMPROPERTY` header pairs and work on both
engines (measured: they survive save + reopen on R2004 and newer; ezdxf
only emits the pairs for AC1018+, so an older document is refused headlessly
instead of losing the write at save).
Custom keys and values are validated once, by name, against what would break
*either* engine: keys AutoCAD's AddCustomInfo rejects mid-write as
`Invalid key` (measured on AutoCAD 2026 by sweeping every printable ASCII
character through a scratch document: leading/trailing whitespace and exactly
the thirteen characters `" * , / : ; < = > ? \\ ` |` anywhere in the key --
internal spaces, tabs, control characters, a no-break space and unicode are
accepted), case-variant duplicates (AutoCAD's keys are case-insensitive:
`Duplicate key`), and line breaks, which ezdxf writes unescaped and which
corrupt the whole DXF. A delete is exempt from the AddCustomInfo syntax rules
(RemoveCustomByKey never validates: `Key not found`, never `Invalid key`).
"""
from __future__ import annotations
import types
import pytest
from backends.base import UnsupportedCapabilityError
from backends.contracts.settings import (
_CUSTOM_KEY_FORBIDDEN,
SUMMARY_FIELDS,
validate_drawing_properties,
)
pytestmark = pytest.mark.asyncio
EMPTY_SUMMARY = {field: None for field in SUMMARY_FIELDS}
# ── shared validation ───────────────────────────────────────────────────────
def test_validation_splits_writes_and_deletes():
written, to_write, to_delete = validate_drawing_properties(
{"title": "Gearbox", "author": None}, {"PROJECT": "X-1", "OLD": None}
)
assert written == {"title": "Gearbox"}
assert to_write == {"PROJECT": "X-1"} and to_delete == ["OLD"]
assert validate_drawing_properties(None, None) == ({}, {}, [])
@pytest.mark.parametrize(
"summary, custom, exc, fragment",
[
({"edition": "1"}, None, ValueError, "edition"),
({"title": 3}, None, TypeError, "summary.title"),
(None, {"N": 3}, TypeError, "custom['N']"),
(None, {"": "x"}, TypeError, "non-empty"),
("Gearbox", None, TypeError, "summary"),
(None, ["PROJECT"], TypeError, "custom"),
# Keys AutoCAD's AddCustomInfo rejects as 'Invalid key' (measured on
# AutoCAD 2026) -- refused here so the live engine never fails
# mid-write after the summary and earlier keys were already applied.
(None, {" BAD ": "x"}, ValueError, "' BAD '"),
(None, {"PROJECT ": "x"}, ValueError, "trailing whitespace"),
(None, {"\tTAB": "x"}, ValueError, "leading or trailing whitespace"),
(None, {"NB\xa0": "x"}, ValueError, "leading or trailing whitespace"),
(None, {"A=B": "x"}, ValueError, "'A=B' contains '='"),
(None, {"A;B": "x"}, ValueError, "'A;B' contains ';'"),
(None, {"A:B/C": "x"}, ValueError, "'A:B/C' contains '/' ':'"),
# Case-variant duplicates: AutoCAD raises 'Duplicate key' on the second.
(None, {"Project": "a", "PROJECT": "b"}, ValueError, "differ only by case"),
(None, {"Project": "a", "PROJECT": None}, ValueError, "differ only by case"),
(None, {"Gr\u00fcn": "a", "GR\u00dcN": "b"}, ValueError, "differ only by case"),
# A line break is written unescaped by ezdxf and corrupts the DXF.
(None, {"NOTE": "line1\nline2"}, ValueError, "custom['NOTE']: the value"),
(None, {"NOTE": "line1\rline2"}, ValueError, "line break"),
(None, {"K\nEY": "x"}, ValueError, "the key contains a line break"),
(None, {"K\nEY": None}, ValueError, "the key contains a line break"),
],
)
def test_validation_refuses_by_name(summary, custom, exc, fragment):
with pytest.raises(exc) as excinfo:
validate_drawing_properties(summary, custom)
assert fragment in str(excinfo.value)
INVALID_KEY_CHARS = '"*,/:;<=>?\\`|'
def test_forbidden_set_is_exactly_the_thirteen_measured_characters():
assert _CUSTOM_KEY_FORBIDDEN == frozenset(INVALID_KEY_CHARS)
assert len(_CUSTOM_KEY_FORBIDDEN) == 13
@pytest.mark.parametrize("char", sorted(INVALID_KEY_CHARS))
def test_validation_refuses_every_addcustominfo_invalid_key_character(char):
"""Measured on AutoCAD 2026 (`AddCustomInfo(f"A{c}B", "v")` for every
c in 0x20-0x7E on a scratch document): exactly these thirteen raise
`Invalid key`. The earlier fix mirrored only `=` and `;`, so 'A:B',
'REV/2', 'SIZE, mm', 'A"B' ... still half-applied on the live engine."""
key = f"A{char}B"
with pytest.raises(ValueError, match="Invalid key") as excinfo:
validate_drawing_properties(None, {key: "x"})
assert repr(key) in str(excinfo.value) and repr(char) in str(excinfo.value)
@pytest.mark.parametrize(
"key",
[
"IN SP",
"T\tAB",
"\u00dcn\u00efcode",
"X" * 300,
"NB\xa0SP",
"A\x01B",
"A\x1fB",
"A!#$%&'()+-.@[]^_{}~B",
"\u4e2d\u2014\u200b",
],
)
def test_validation_accepts_keys_autocad_accepts(key):
"""Measured: internal spaces, tabs, control characters, a no-break space,
unicode, every other printable ASCII character and 300-char keys pass
AddCustomInfo; the validator must not be stricter than AutoCAD."""
assert validate_drawing_properties(None, {key: "v"}) == ({}, {key: "v"}, [])
@pytest.mark.parametrize("key", ["A=B", " PAD ", "A:B", "NB\xa0", 'A"B'])
def test_validation_exempts_a_delete_from_the_addcustominfo_syntax_rules(key):
"""A delete never calls AddCustomInfo, and RemoveCustomByKey does not
validate syntax (measured: 'Key not found', never 'Invalid key'), so a key
a DXF script wrote must stay removable. The line-break rule still holds
for both directions (a delete of such a key is pinned refused above)."""
assert validate_drawing_properties(None, {key: None}) == ({}, {}, [key])
# ── headless engine ─────────────────────────────────────────────────────────
async def test_get_reports_no_summary_and_empty_custom(backend):
assert await backend.drawing_properties_get() == {
"summary": EMPTY_SUMMARY,
"summary_available": False,
"custom": {},
"backend": "ezdxf",
}
async def test_custom_properties_write_replace_delete_and_survive_reopen(backend, tmp_path):
first = await backend.drawing_properties_set(custom={"PROJECT": "X-1", "REV": "B"})
assert first == {
"ok": True,
"summary_written": [],
"custom_written": ["PROJECT", "REV"],
"custom_deleted": [],
"backend": "ezdxf",
}
second = await backend.drawing_properties_set(
custom={"REV": None, "NOPE": None, "PROJECT": "X-2"}
)
assert second["custom_written"] == ["PROJECT"]
assert second["custom_deleted"] == ["REV"], "a key that was never there is not 'deleted'"
assert (await backend.drawing_properties_get())["custom"] == {"PROJECT": "X-2"}
assert [t for t, _ in backend._doc.header.custom_vars] == ["PROJECT"], "no duplicate tags"
path = str(tmp_path / "props.dxf")
await backend.drawing_save_as(path)
await backend.drawing_open(path)
assert (await backend.drawing_properties_get())["custom"] == {"PROJECT": "X-2"}
async def test_line_break_is_refused_before_any_write_and_the_file_still_opens(backend, tmp_path):
"""Measured: `custom={'NOTE': 'line1\\nline2', 'AFTER': 'ok'}` reported
`ok: True`, and the saved DXF failed to reopen with
`DXFStructureError: Invalid group code "line2"` -- the whole drawing lost,
reported as success. The request is refused as a whole, so AFTER is not
written either, and the file saved afterwards reopens."""
with pytest.raises(ValueError, match=r"custom\['NOTE'\]: the value contains a line break"):
await backend.drawing_properties_set(custom={"NOTE": "line1\nline2", "AFTER": "ok"})
assert (await backend.drawing_properties_get())["custom"] == {}
path = str(tmp_path / "clean.dxf")
await backend.drawing_save_as(path)
await backend.drawing_open(path)
assert (await backend.drawing_properties_get())["custom"] == {}
async def test_autocad_invalid_keys_are_refused_headlessly_too(backend):
"""The headless engine used to write ' BAD ', 'A=B' and 'A;B' without
complaint (and AutoCAD loaded them from the DXF) while the live engine
half-applied the same call; both now refuse before writing."""
with pytest.raises(ValueError, match="' BAD '"):
await backend.drawing_properties_set(custom={"AAA": "first", " BAD ": "x", "ZZZ": "n"})
assert (await backend.drawing_properties_get())["custom"] == {}
async def test_legacy_invalid_syntax_keys_stay_deletable_headlessly(tmp_path):
"""Regression of 2b9791f: `_check_custom_key` ran before the `value is
None` branch, so `{'A=B': None}` on a document carrying 'A=B' (any ezdxf
script writes such keys; AutoCAD loads them from the DXF) was refused with
a reason that only applies to AddCustomInfo -- the tool showed a key it
could never remove."""
import ezdxf
from backends.ezdxf_backend import EzdxfBackend
path = tmp_path / "legacy.dxf"
doc = ezdxf.new("R2010")
for tag in ("A=B", "NB\xa0SP", " PAD ", "A:B"):
doc.header.custom_vars.append(tag, "legacy")
doc.saveas(str(path))
backend = EzdxfBackend()
await backend.connect()
try:
await backend.drawing_open(str(path))
assert (await backend.drawing_properties_get())["custom"] == {
"A=B": "legacy",
"NB\xa0SP": "legacy",
" PAD ": "legacy",
"A:B": "legacy",
}
res = await backend.drawing_properties_set(custom={"A=B": None, " PAD ": None})
assert res["custom_deleted"] == ["A=B", " PAD "]
assert (await backend.drawing_properties_get())["custom"] == {
"NB\xa0SP": "legacy",
"A:B": "legacy",
}
# ...but writing such a key is still refused, before anything is touched.
with pytest.raises(ValueError, match="'A:B' contains ':'"):
await backend.drawing_properties_set(custom={"A:B": "new", "OK": "x"})
assert (await backend.drawing_properties_get())["custom"] == {
"NB\xa0SP": "legacy",
"A:B": "legacy",
}
finally:
await backend.disconnect()
async def test_custom_keys_match_case_insensitively_headlessly(backend):
"""Mirrors AutoCAD (measured on 2026): a write to 'PROJECT' over an
existing 'Project' updates it under the stored spelling instead of adding
a second tag AutoCAD would call a duplicate; a delete matches either
spelling."""
await backend.drawing_properties_set(custom={"Project": "X-1", "Rev": "A"})
res = await backend.drawing_properties_set(custom={"PROJECT": "X-2", "rev": None})
assert res["custom_written"] == ["PROJECT"] and res["custom_deleted"] == ["rev"]
assert list(backend._doc.header.custom_vars) == [("Project", "X-2")]
assert (await backend.drawing_properties_get())["custom"] == {"Project": "X-2"}
async def _backend_for_version(tmp_path, version: str):
import ezdxf
from backends.ezdxf_backend import EzdxfBackend
path = tmp_path / f"{version}.dxf"
ezdxf.new(version).saveas(str(path))
backend = EzdxfBackend()
await backend.connect()
await backend.drawing_open(str(path))
return backend
@pytest.mark.parametrize("version, dxfversion", [("R12", "AC1009"), ("R2000", "AC1015")])
async def test_custom_properties_before_r2004_are_refused_rather_than_lost(
tmp_path, version, dxfversion
):
"""Measured: on an R12 or R2000 document `drawing_properties_set` reported
`ok: True, custom_written: ['PROJECT']`, `drawing_properties_get` echoed
it from memory, and `drawing_save_as` (version kept) wrote nothing --
ezdxf emits $CUSTOMPROPERTYTAG / $CUSTOMPROPERTY only after $LASTSAVEDBY,
which does not exist before R2004. The header-only write that vanishes on
save, the class f3ff703 removed for CANNOSCALE. Refused up front, before
custom_vars is touched; the reopened file is read back to prove it."""
backend = await _backend_for_version(tmp_path, version)
try:
assert backend._doc.dxfversion == dxfversion
with pytest.raises(ValueError, match=dxfversion) as excinfo:
await backend.drawing_properties_set(custom={"PROJECT": "X-1", "REV": "B"})
assert "R2004 or newer" in str(excinfo.value)
assert "PROJECT" in str(excinfo.value)
assert list(backend._doc.header.custom_vars) == []
assert (await backend.drawing_properties_get())["custom"] == {}
# A delete on the same document is refused for the same reason: it
# would report a key removed that the file could never have held.
with pytest.raises(ValueError, match="R2004 or newer"):
await backend.drawing_properties_set(custom={"PROJECT": None})
# An empty request touches nothing and is not a write to refuse.
res = await backend.drawing_properties_set(custom={})
assert res["ok"] is True and res["custom_written"] == []
out = tmp_path / f"{version}_out.dxf"
await backend.drawing_save_as(str(out))
await backend.drawing_open(str(out))
assert backend._doc.dxfversion == dxfversion
assert (await backend.drawing_properties_get())["custom"] == {}
finally:
await backend.disconnect()
async def test_custom_properties_on_r2004_survive_save_and_reopen(tmp_path):
"""The oldest version that carries the pairs -- the boundary the refusal
sits on -- round-trips."""
backend = await _backend_for_version(tmp_path, "R2004")
try:
res = await backend.drawing_properties_set(custom={"PROJECT": "X-1"})
assert res["custom_written"] == ["PROJECT"]
out = tmp_path / "r2004_out.dxf"
await backend.drawing_save_as(str(out))
await backend.drawing_open(str(out))
assert backend._doc.dxfversion == "AC1018"
assert (await backend.drawing_properties_get())["custom"] == {"PROJECT": "X-1"}
finally:
await backend.disconnect()
async def test_summary_is_refused_headlessly_before_any_write(backend):
with pytest.raises(UnsupportedCapabilityError) as excinfo:
await backend.drawing_properties_set(summary={"title": "T"}, custom={"LATE": "no"})
assert excinfo.value.capability == "dwgprops"
assert "title" in str(excinfo.value)
assert (await backend.drawing_properties_get())["custom"] == {}
async def test_all_null_summary_is_not_a_summary_write(backend):
res = await backend.drawing_properties_set(summary={"title": None, "author": None})
assert res["ok"] is True and res["summary_written"] == []
async def test_malformed_custom_is_refused_by_name_before_any_write(backend):
with pytest.raises(TypeError, match=r"custom\['N'\]"):
await backend.drawing_properties_set(custom={"OK": "1", "N": 3})
assert (await backend.drawing_properties_get())["custom"] == {}
def test_both_capability_maps_declare_dwgprops():
from backends.com_backend import ComBackend
from backends.ezdxf_backend import EzdxfBackend
assert EzdxfBackend().capabilities().to_dict()["features"]["dwgprops"]["supported"] is False
assert ComBackend().capabilities().to_dict()["features"]["dwgprops"]["supported"] is True
# ── server tools ────────────────────────────────────────────────────────────
class _FakeCtx:
def __init__(self, backend):
self.lifespan_context = {"backend": backend}
async def info(self, *a, **k):
pass
async def test_server_tools_round_trip_custom_and_refuse_summary(backend):
import server
ctx = _FakeCtx(backend)
res = await server.drawing_properties_set(custom={"PROJECT": "X-9"}, ctx=ctx)
assert res["custom_written"] == ["PROJECT"]
got = await server.drawing_properties_get(ctx=ctx)
assert got["custom"] == {"PROJECT": "X-9"} and got["summary_available"] is False
with pytest.raises(UnsupportedCapabilityError):
await server.drawing_properties_set(title="Gearbox", ctx=ctx)
# ── live engine, against a fake SummaryInfo ─────────────────────────────────
class _FakeSummaryInfo:
def __init__(self):
self.Title = "Old title"
self.Subject = ""
self.Author = ""
self.Keywords = "gear"
self.Comments = ""
self._custom: list[tuple[str, str]] = [("PROJECT", "X-1"), ("OLD", "1")]
self.calls: list[tuple] = []
def NumCustomInfo(self):
self.calls.append(("NumCustomInfo",))
return len(self._custom)
def GetCustomByIndex(self, index):
self.calls.append(("GetCustomByIndex", index))
return self._custom[index] # pywin32 hands [out] BSTR pairs back as a tuple
# Measured on AutoCAD 2026: the three mutators match keys case-insensitively,
# an existing key keeps its stored spelling, a second Add is 'Duplicate key',
# a Set/Remove of an absent key is 'Key not found'.
def _index(self, key):
for i, (k, _v) in enumerate(self._custom):
if k.casefold() == key.casefold():
return i
return None
def AddCustomInfo(self, key, value):
self.calls.append(("AddCustomInfo", key, value))
if self._index(key) is not None:
raise RuntimeError("AutoCAD COM error: Duplicate key")
self._custom.append((key, value))
def SetCustomByKey(self, key, value):
self.calls.append(("SetCustomByKey", key, value))
i = self._index(key)
if i is None:
raise RuntimeError("AutoCAD COM error: Key not found")
self._custom[i] = (self._custom[i][0], value)
def RemoveCustomByKey(self, key):
self.calls.append(("RemoveCustomByKey", key))
i = self._index(key)
if i is None:
raise RuntimeError("AutoCAD COM error: Key not found")
del self._custom[i]
@pytest.fixture
def com_backend(monkeypatch):
pytest.importorskip("win32com.client", reason="pywin32 not installed")
from backends import com_backend as module
info = _FakeSummaryInfo()
document = types.SimpleNamespace(SummaryInfo=info)
monkeypatch.setattr(module, "_acad_doc", lambda: document)
backend = module.ComBackend()
async def _run_inline(func, *args, **kwargs):
return func(*args, **kwargs)
monkeypatch.setattr(backend, "_run", _run_inline)
return backend, info
async def test_com_get_reads_summary_and_custom(com_backend):
backend, info = com_backend
assert await backend.drawing_properties_get() == {
"summary": {
"title": "Old title",
"subject": "",
"author": "",
"keywords": "gear",
"comments": "",
},
"summary_available": True,
"custom": {"PROJECT": "X-1", "OLD": "1"},
"backend": "com",
}
async def test_com_set_writes_summary_and_routes_custom_by_existence(com_backend):
backend, info = com_backend
res = await backend.drawing_properties_set(
summary={"title": "Gearbox", "author": "U. Can", "subject": None},
custom={"PROJECT": "X-2", "REV": "B", "OLD": None, "NOPE": None},
)
assert res == {
"ok": True,
"summary_written": ["author", "title"],
"custom_written": ["PROJECT", "REV"],
"custom_deleted": ["OLD"],
"backend": "com",
}
assert info.Title == "Gearbox" and info.Author == "U. Can" and info.Keywords == "gear"
mutations = [c for c in info.calls if c[0] not in ("NumCustomInfo", "GetCustomByIndex")]
assert mutations == [
("SetCustomByKey", "PROJECT", "X-2"), # existed → set
("AddCustomInfo", "REV", "B"), # new → add
("RemoveCustomByKey", "OLD"), # existed → remove; NOPE never touched
]
async def test_com_validates_before_touching_activex(com_backend):
backend, info = com_backend
with pytest.raises(TypeError):
await backend.drawing_properties_set(summary={"title": "T"}, custom={"N": 3})
with pytest.raises(ValueError):
await backend.drawing_properties_set(summary={"edition": "1"})
assert info.calls == [] and info.Title == "Old title"
@pytest.mark.parametrize(
"key", ["A:B", "REV/2", "SIZE, mm", 'A"B', "A\\B", "A<B>", "A|B", "A*B", "A?B"]
)
async def test_com_refuses_every_addcustominfo_invalid_key_before_any_write(com_backend, key):
"""Re-measured on AutoCAD 2026 after 2b9791f: `summary={'subject':
'PARTIAL?'}, custom={'AAA': 'first', 'A:B': 'x', 'ZZZ': 'never'}` still
raised from AddCustomInfo('A:B') and left subject='PARTIAL?',
custom={'AAA': 'first'} -- the same half-write for every character the
first fix did not mirror. Nothing reaches SummaryInfo now."""
backend, info = com_backend
with pytest.raises(ValueError, match="Invalid key"):
await backend.drawing_properties_set(
summary={"subject": "PARTIAL?"},
custom={"AAA": "first", key: "x", "ZZZ": "never"},
)
assert info.calls == [] and info.Subject == ""
assert info._custom == [("PROJECT", "X-1"), ("OLD", "1")]
async def test_com_deletes_a_legacy_invalid_syntax_key(com_backend):
"""RemoveCustomByKey does not validate syntax (measured: 'Key not found'
for an absent 'A=B', never 'Invalid key'), so a key AutoCAD loaded from a
DXF is removed, not refused."""
backend, info = com_backend
info._custom.append(("A=B", "legacy"))
res = await backend.drawing_properties_set(custom={"A=B": None})
assert res["custom_deleted"] == ["A=B"]
assert ("RemoveCustomByKey", "A=B") in info.calls
assert info._custom == [("PROJECT", "X-1"), ("OLD", "1")]
async def test_com_routes_case_variant_keys_to_set_and_remove(com_backend):
"""Measured on AutoCAD 2026: AddCustomInfo('PROJECT') over an existing
'Project' raises 'Duplicate key' -- a case-sensitive existence check
routed it there and failed mid-write. Existence is matched casefolded."""
backend, info = com_backend
res = await backend.drawing_properties_set(custom={"project": "X-2", "old": None, "New": "n"})
assert res["custom_written"] == ["New", "project"] and res["custom_deleted"] == ["old"]
mutations = [c for c in info.calls if c[0] not in ("NumCustomInfo", "GetCustomByIndex")]
assert mutations == [
("SetCustomByKey", "project", "X-2"),
("AddCustomInfo", "New", "n"),
("RemoveCustomByKey", "old"),
]
assert info._custom == [("PROJECT", "X-2"), ("New", "n")], "stored spelling kept"
async def test_com_refuses_autocad_invalid_keys_before_any_write(com_backend):
"""Measured on AutoCAD 2026: `summary={'subject': 'PARTIAL?'},
custom={'AAA': 'first', ' BAD ': 'x', 'ZZZ': 'never'}` raised an unnamed
COM error from AddCustomInfo(' BAD ') and left subject and AAA written,
ZZZ absent -- a half-applied write reported as an error. The shared
validator now names the key and nothing reaches SummaryInfo."""
backend, info = com_backend
with pytest.raises(ValueError, match="' BAD '"):
await backend.drawing_properties_set(
summary={"subject": "PARTIAL?"},
custom={"AAA": "first", " BAD ": "x", "ZZZ": "never"},
)
assert info.calls == [] and info.Subject == ""
assert info._custom == [("PROJECT", "X-1"), ("OLD", "1")]