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autocad-mcp-pro/tests/test_styles.py
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"""Dimension, text and multileader styles on both engines.
Headless: real ezdxf tables, and the *rendered* dimension block as the witness
that a current style reaches the next dimension (the header alone was never
the thing that could lie — see tests/test_dimension_header_vars.py). Live:
a fake ActiveX surface that records the call shapes the COM block relies on
and models the one AutoCAD rule it depends on — making a style current
restores that style's saved DIM* settings.
"""
from __future__ import annotations
import types
import ezdxf
import pytest
import config
from backends.capability import is_capability_default
from backends.ezdxf_backend import _current_dimstyle_name, _current_textstyle_name
from engineering.standards.dimstyles import PRESET_VARIABLES, resolve_dimstyle
from engineering.standards.mleaderstyles import resolve_mleaderstyle
pytestmark = pytest.mark.asyncio
def _rendered(backend, handle):
"""(text, text height, arrow xscales) out of the dimension's geometry block."""
dim = backend._doc.entitydb.get(handle)
block = backend._doc.blocks.get(dim.dxf.geometry)
text = height = None
arrows = []
for entity in block:
if entity.dxftype() == "MTEXT" and text is None:
text, height = entity.text, round(float(entity.dxf.char_height), 4)
elif entity.dxftype() == "TEXT" and text is None:
text, height = entity.dxf.text, round(float(entity.dxf.height), 4)
elif entity.dxftype() == "INSERT":
arrows.append(round(float(entity.dxf.get("xscale", 1.0)), 4))
if text is None:
raise AssertionError("the dimension block carries no text")
return text, height, sorted(set(arrows))
# ── headless engine ─────────────────────────────────────────────────────────
async def test_dimstyle_list_reports_standard_current_with_the_seventeen_values(backend):
rows = await backend.dimstyle_list()
assert [r["name"] for r in rows] == ["Standard"]
assert rows[0]["current"] is True and rows[0]["values_available"] is True
assert tuple(rows[0]["values"]) == PRESET_VARIABLES
assert rows[0]["values"]["DIMTXT"] == 2.5
assert rows[0]["values"]["DIMDSEP"] == ".", "drawing_new's ISO point"
assert rows[0]["values"]["DIMTXSTY"] == "Standard", "unstored code reports the schema default"
async def test_dimstyle_create_iso25_writes_every_value_and_creates_isocp(backend):
result = await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None))
assert result["ok"] is True and result["name"] == "ISO-25"
assert result["textstyle_created"] is True and result["current"] is False
assert result["values"]["DIMDSEP"] == "," and result["values"]["DIMTXSTY"] == "ISOCP"
assert result["written"] == sorted(PRESET_VARIABLES)
style = backend._doc.dimstyles.get("ISO-25")
assert style.dxf.dimtxt == 2.5 and style.dxf.dimdsep == 44 and style.dxf.dimtad == 1
assert style.dxf.dimtxsty == "ISOCP" and style.dxf.dimlwd == -2 and style.dxf.dimblk == ""
assert backend._doc.styles.get("ISOCP").dxf.font == "isocp.shx"
# ezdxf.new() writes $DIMSTYLE "ISO-25" with no such entry; creating the
# entry must not make it current by accident.
assert backend._doc.header["$DIMSTYLE"] == "Standard"
assert _current_dimstyle_name(backend._doc) == "Standard"
async def test_set_current_syncs_the_header_and_the_next_dimension_renders_with_it(backend):
await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None), set_current=True)
header = backend._doc.header
assert header["$DIMSTYLE"] == "ISO-25"
assert header["$DIMDSEP"] == 44 and header["$DIMTXT"] == 2.5 and header["$DIMTXSTY"] == "ISOCP"
dim = await backend.dimension_linear(0, 0, 33.333, 0, 16, -30)
assert backend._doc.entitydb.get(dim.handle).dxf.dimstyle == "ISO-25"
assert _rendered(backend, dim.handle) == ("33,33", 2.5, [2.5])
await backend.dimstyle_create("ANSI", resolve_dimstyle("ansi", None), set_current=True)
dim2 = await backend.dimension_linear(0, 0, 33.333, 0, 16, -60)
assert backend._doc.entitydb.get(dim2.handle).dxf.dimstyle == "ANSI"
assert _rendered(backend, dim2.handle) == ("33.33", 3.0, [3.0])
for creator, args in (
(backend.dimension_aligned, (0, 0, 10, 10, 5, 15)),
(backend.dimension_radius, (50, 50, 60, 50)),
(backend.dimension_diameter, (70, 0, 90, 0)),
(backend.dimension_angular, (0, 0, 10, 0, 0, 10, 5, 5)),
):
created = await creator(*args)
assert backend._doc.entitydb.get(created.handle).dxf.dimstyle == "ANSI", creator.__name__
async def test_dimstyle_modify_reports_only_what_moved_and_the_dimensions_using_it(backend):
await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None), set_current=True)
dim = await backend.dimension_linear(0, 0, 10, 0, 5, -10)
result = await backend.dimstyle_modify("iso-25", {"DIMTXT": 2.5, "DIMDEC": 3, "dimrnd": 0})
assert result["name"] == "ISO-25"
assert result["changed"] == {"DIMDEC": [2, 3]}
assert result["dimensions_using_style"] == [dim.handle]
assert result["rerender_required"] is True
assert backend._doc.header["$DIMDEC"] == 3, "the current style's header twin follows"
assert not backend._doc.dimstyles.get("ISO-25").dxf.hasattr("dimrnd"), (
"DIMRND 0 is 'no rounding' and must be discarded, not stored (xround(x, 0.0) rounds)"
)
again = await backend.dimstyle_modify("ISO-25", {"DIMDEC": 3})
assert again["changed"] == {} and again["rerender_required"] is False
on_standard = await backend.dimstyle_modify("Standard", {"DIMDEC": 4})
assert on_standard["dimensions_using_style"] == [] and on_standard["rerender_required"] is False
assert backend._doc.header["$DIMDEC"] == 3, "a non-current style does not touch the header"
async def test_refusals_happen_before_anything_is_written(backend):
await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None))
with pytest.raises(ValueError, match="already exists"):
await backend.dimstyle_create("iso-25", resolve_dimstyle("iso-25", None))
with pytest.raises(ValueError, match="DIMTXSTY"):
await backend.dimstyle_create("X", resolve_dimstyle("iso-25", {"DIMTXSTY": "NOPE"}))
assert not backend._doc.dimstyles.has_entry("X")
with pytest.raises(ValueError, match="DIMFOO"):
await backend.dimstyle_create("Y", {"DIMFOO": 1})
assert not backend._doc.dimstyles.has_entry("Y")
with pytest.raises(ValueError, match="DIMDEC"):
await backend.dimstyle_modify("ISO-25", {"DIMDEC": 9})
with pytest.raises(ValueError, match="does not exist"):
await backend.dimstyle_modify("NOPE", {"DIMDEC": 1})
with pytest.raises(ValueError, match="empty"):
await backend.dimstyle_modify("ISO-25", {})
with pytest.raises(ValueError, match="does not exist"):
await backend.dimstyle_set_current("NOPE")
assert backend._doc.dimstyles.get("ISO-25").dxf.dimdec == 2
# DIMDSEP is stored as ``ord(value)``: a control character or a code point
# above the 16-bit group 278 must stop here, not reach the table.
with pytest.raises(ValueError, match="DIMDSEP"):
await backend.dimstyle_create("Z", {"DIMDSEP": "\n"})
assert not backend._doc.dimstyles.has_entry("Z")
with pytest.raises(ValueError, match="DIMDSEP"):
await backend.dimstyle_modify("ISO-25", {"DIMDSEP": "\U0001f600"})
assert backend._doc.dimstyles.get("ISO-25").dxf.dimdsep == 44
async def test_builtin_arrowheads_render_save_and_report_one_spelling(backend, tmp_path):
"""`validate_overrides` hands the canonical `_OBLIQUE`; stored verbatim ezdxf
raises at render and at `doc.write`. The witness is the rendered INSERT and
a save/reopen that reports the same name before and after."""
values = resolve_dimstyle(
"iso-25", {"DIMBLK": "oblique", "DIMSAH": 1, "DIMBLK1": "_DOT", "DIMBLK2": "."}
)
result = await backend.dimstyle_create("ISO-25", values, set_current=True)
assert result["values"]["DIMBLK"] == "_OBLIQUE"
style = backend._doc.dimstyles.get("ISO-25")
assert style.dxf.dimblk == "OBLIQUE" and style.dxf.dimblk1 == "DOT" and style.dxf.dimblk2 == ""
dim = await backend.dimension_linear(0, 0, 20, 0, 10, -10)
block = backend._doc.blocks.get(backend._doc.entitydb.get(dim.handle).dxf.geometry)
assert {e.dxf.name for e in block if e.dxftype() == "INSERT"} == {"_DOT", "_CLOSEDFILLED"}, (
"DIMSAH on: the two separate arrowheads win over DIMBLK"
)
again = await backend.dimstyle_modify("ISO-25", {"DIMBLK": "OBLIQUE", "DIMBLK1": "_dot"})
assert again["changed"] == {}, "re-setting a value to itself is not a change (spec §8.3)"
# The style is current, so Restore loaded it into the $DIM* header. The
# header is DXF-facing: a built-in is spelled with its underscore there
# (what a live seat stores and what COM's system_get_variable returns),
# never ezdxf's writer spelling the DIMSTYLE entry holds.
header = backend._doc.header
assert (header["$DIMBLK"], header["$DIMBLK1"], header["$DIMBLK2"]) == ("_OBLIQUE", "_DOT", "")
assert await backend.system_get_variable("DIMBLK") == "_OBLIQUE", "the same answer as COM"
path = str(tmp_path / "arrows.dxf")
await backend.drawing_save_as(path)
saved = ezdxf.readfile(path)
assert saved.header["$DIMBLK"] == "_OBLIQUE" and saved.header["$DIMBLK1"] == "_DOT", (
"the file names the block it actually holds, not a block that does not exist"
)
assert "_OBLIQUE" in saved.blocks and "_DOT" in saved.blocks
await backend.drawing_open(path)
rows = {r["name"]: r for r in await backend.dimstyle_list()}
assert rows["ISO-25"]["values"]["DIMBLK"] == "_OBLIQUE", "reloaded, the same spelling"
assert await backend.system_get_variable("DIMBLK") == "_OBLIQUE"
reopened = await backend.dimstyle_modify("ISO-25", {"DIMBLK": "oblique"})
assert reopened["changed"] == {}
await backend.dimstyle_set_current("Standard")
header = backend._doc.header # drawing_open replaced the document
assert (header["$DIMBLK"], header["$DIMBLK1"], header["$DIMBLK2"]) == ("", "", ""), (
"closed filled is the empty string in the header, as in a fresh drawing"
)
async def test_user_arrowhead_block_must_exist_before_anything_is_written(backend):
with pytest.raises(ValueError, match="DIMBLK: block 'MYARROW' does not exist"):
await backend.dimstyle_create("X", resolve_dimstyle("iso-25", {"DIMBLK": "MYARROW"}))
assert not backend._doc.dimstyles.has_entry("X")
await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None))
with pytest.raises(ValueError, match="DIMBLK1: block 'MYARROW' does not exist"):
await backend.dimstyle_modify("ISO-25", {"DIMSAH": 1, "DIMBLK1": "MYARROW"})
assert not backend._doc.dimstyles.get("ISO-25").dxf.hasattr("dimsah"), "nothing written"
backend._doc.blocks.new("MYARROW").add_line((0, 0), (1, 1))
result = await backend.dimstyle_modify("ISO-25", {"DIMBLK": "myarrow"})
assert result["changed"] == {"DIMBLK": ["", "MYARROW"]}, "the block table's own spelling"
assert backend._doc.dimstyles.get("ISO-25").dxf.dimblk == "MYARROW"
async def test_dimstyle_set_current_reports_previous_and_survives_save_reopen(backend, tmp_path):
await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None))
result = await backend.dimstyle_set_current("iso-25")
assert result == {"ok": True, "current": "ISO-25", "previous": "Standard", "changed": True}
same = await backend.dimstyle_set_current("ISO-25")
assert same["changed"] is False and same["previous"] == "ISO-25"
path = str(tmp_path / "styles.dxf")
await backend.drawing_save_as(path)
await backend.drawing_open(path)
rows = await backend.dimstyle_list()
assert [r["name"] for r in rows if r["current"]] == ["ISO-25"]
assert rows[0]["name"] == "ISO-25" and rows[0]["values"]["DIMDSEP"] == ","
# The table's report was never the thing that could lie; the render is.
dim = await backend.dimension_linear(0, 0, 33.333, 0, 16, -30)
assert _rendered(backend, dim.handle) == ("33,33", 2.5, [2.5])
async def test_a_user_dimstyle_survives_every_dxf_round_trip_without_rounding(
backend, tmp_path, monkeypatch
):
"""ezdxf's exporter writes DIMRND 0.0 for *every* DIMSTYLE, and a stored 0.0
makes the renderer round every dimension to a whole unit. Measured before
`_normalise_dimstyle_rounding` walked the whole table: ISO-25 came back from
a save/open, a `transaction_rollback` and a `drawing_undo` rendering 33.333
as "33" and R6.35 as "R6" while `dimstyle_list` still reported DIMDEC 2."""
monkeypatch.setattr(config.settings, "ezdxf_undo_depth", 4)
await backend.drawing_new() # a history baseline with undo switched on
await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None), set_current=True)
await backend.dimstyle_create("ANSI", resolve_dimstyle("ansi", None))
dim = await backend.dimension_linear(0, 0, 33.333, 0, 16, -30)
assert _rendered(backend, dim.handle) == ("33,33", 2.5, [2.5])
def _rounding_stored() -> dict[str, bool]:
return {s.dxf.name: s.dxf.hasattr("dimrnd") for s in backend._doc.dimstyles}
path = str(tmp_path / "roundtrip.dxf")
await backend.drawing_save_as(path)
assert ezdxf.readfile(path).dimstyles.get("ISO-25").dxf.get("dimrnd") == 0.0, (
"the premise: the file on disk carries the 0.0 sentinel for a user style"
)
await backend.drawing_open(path)
assert _rounding_stored() == {"Standard": False, "ISO-25": False, "ANSI": False}
reopened = await backend.dimension_linear(0, 0, 33.333, 0, 16, -60)
assert _rendered(backend, reopened.handle) == ("33,33", 2.5, [2.5])
radius = await backend.dimension_radius(50, 50, 56.35, 50)
assert _rendered(backend, radius.handle)[0] == "R6,35"
await backend.dimstyle_set_current("ANSI")
ansi = await backend.dimension_linear(0, 0, 12.75, 0, 6, -90)
assert _rendered(backend, ansi.handle)[0] == "12.75"
await backend.dimstyle_set_current("ISO-25")
await backend.transaction_begin()
await backend.entity_create_line(0, 0, 10, 10)
await backend.transaction_rollback()
assert _rounding_stored() == {"Standard": False, "ISO-25": False, "ANSI": False}
rolled_back = await backend.dimension_linear(0, 0, 33.333, 0, 16, -120)
assert _rendered(backend, rolled_back.handle) == ("33,33", 2.5, [2.5])
await backend.entity_create_line(0, 0, 20, 20)
assert (await backend.drawing_undo())["ok"] is True
assert _rounding_stored() == {"Standard": False, "ISO-25": False, "ANSI": False}
undone = await backend.dimension_linear(0, 0, 33.333, 0, 16, -150)
assert _rendered(backend, undone.handle) == ("33,33", 2.5, [2.5])
await backend.dimstyle_modify("ISO-25", {"DIMRND": 0.5})
await backend.drawing_save_as(path)
await backend.drawing_open(path)
assert backend._doc.dimstyles.get("ISO-25").dxf.dimrnd == 0.5, (
"only the 0.0 sentinel is discarded; a rounding the drafter asked for survives"
)
async def test_drawing_purge_keeps_what_the_style_tables_and_header_reference(backend, tmp_path):
"""`drawing_purge` followed only entity `.dxf.style`; a text style that only
a DIMSTYLE, an MLEADERSTYLE or the header referenced was deleted, the next
dimension silently rendered in Standard, and `drawing_save_as` raised
`DXFTableEntryError` after leaving a truncated file on disk."""
await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None), set_current=True)
await backend.mleaderstyle_create("ANSI", resolve_mleaderstyle("ansi", None))
await backend.textstyle_create("Notes", "arial.ttf", set_current=True)
await backend.textstyle_create("Junk", "isocpeur.ttf")
await backend.block_define("MYARROW", [{"type": "line", "x1": 0, "y1": 0, "x2": -1, "y2": 0.2}])
await backend.dimstyle_create("ARROWED", resolve_dimstyle("ansi", {"DIMBLK": "MYARROW"}))
result = await backend.drawing_purge()
assert result["purged"]["text_styles"] == 1, "only the style nothing references goes"
assert result["purged"]["blocks"] == 0
names = {row["name"] for row in await backend.textstyle_list()}
assert {"Standard", "ISOCP", "ROMANS", "Notes"} <= names and "Junk" not in names
assert [r["name"] for r in await backend.textstyle_list() if r["current"]] == ["Notes"]
assert "MYARROW" in backend._doc.blocks
leader_styles = {r["name"]: r["text_style"] for r in await backend.mleaderstyle_list()}
assert leader_styles["ANSI"] == "ROMANS"
dim = await backend.dimension_linear(0, 0, 33.333, 0, 16, -30)
assert _rendered(backend, dim.handle) == ("33,33", 2.5, [2.5])
path = str(tmp_path / "purged.dxf")
await backend.drawing_save_as(path)
reopened = ezdxf.readfile(path)
assert reopened.dimstyles.get("ISO-25").dxf.dimtxsty == "ISOCP"
assert reopened.header["$TEXTSTYLE"] == "Notes"
async def test_set_current_restores_every_dim_variable_not_just_the_stored_ones(backend, tmp_path):
"""A live seat's `-DIMSTYLE Restore` replaces *all* DIM* variables. Writing
only what the target style stores left the previous style's values in the
header: measured, ISO-25 with DIMZIN 0 / DIMSCALE 2.0 then
`dimstyle_set_current("Standard")` rendered the next dimension at 5.0 mm as
"33.30" and the saved file carried those next to `$DIMSTYLE Standard`."""
from engineering.standards.dimstyles import DIM_VARIABLE_WHITELIST
header = backend._doc.header
fresh = {f"${var}": header.get(f"${var}", None) for var in DIM_VARIABLE_WHITELIST}
baseline = await backend.dimension_linear(0, 0, 33.3, 0, 16, -30)
values = resolve_dimstyle("iso-25", {"DIMZIN": 0, "DIMSCALE": 2.0})
await backend.dimstyle_create("ISO-25", values, set_current=True)
assert header["$DIMZIN"] == 0 and header["$DIMSCALE"] == 2.0
assert header["$DIMTXSTY"] == "ISOCP"
result = await backend.dimstyle_set_current("Standard")
assert result["current"] == "Standard"
assert {key: header.get(key, None) for key in fresh} == fresh, (
"restoring Standard must reproduce the header drawing_new made"
)
dim = await backend.dimension_linear(0, 0, 33.3, 0, 16, -60)
expected = ("33.3", 2.5, [2.5])
assert _rendered(backend, dim.handle) == _rendered(backend, baseline.handle) == expected
assert backend._doc.entitydb.get(dim.handle).override().dimstyle_attribs == {}, (
"nothing stale is folded onto the dimension"
)
# DIMRND 0 discards the style attribute; the header twin must follow.
await backend.dimstyle_set_current("ISO-25")
assert header["$DIMZIN"] == 0 and header["$DIMSCALE"] == 2.0
await backend.dimstyle_modify("ISO-25", {"DIMRND": 0.5})
assert header["$DIMRND"] == 0.5
cleared = await backend.dimstyle_modify("ISO-25", {"DIMRND": 0})
assert cleared["changed"] == {"DIMRND": [0.5, 0]}
assert header["$DIMRND"] == 0.0
await backend.dimstyle_set_current("Standard")
path = str(tmp_path / "restored.dxf")
await backend.drawing_save_as(path)
saved = ezdxf.readfile(path).header
assert saved["$DIMSTYLE"] == "Standard"
assert {key: saved.get(key, None) for key in fresh} == fresh
async def test_textstyle_create_list_set_current_and_new_text_uses_it(backend):
result = await backend.textstyle_create("ISOCP", "isocp", set_current=True)
assert result == {
"ok": True,
"name": "ISOCP",
"font": "isocp.shx",
"font_resolved": True,
"current": True,
}
rows = await backend.textstyle_list()
assert [r["name"] for r in rows] == ["ISOCP", "Standard"]
assert rows[0] == {
"name": "ISOCP",
"font": "isocp.shx",
"height": 0.0,
"width_factor": 1.0,
"oblique_deg": 0.0,
"current": True,
}
assert backend._doc.header["$TEXTSTYLE"] == "ISOCP"
assert _current_textstyle_name(backend._doc) == "ISOCP"
text = await backend.entity_create_text("note", 0, 0)
mtext = await backend.entity_create_mtext("note", 0, 10)
assert backend._doc.entitydb.get(text.handle).dxf.style == "ISOCP"
assert backend._doc.entitydb.get(mtext.handle).dxf.style == "ISOCP"
back = await backend.textstyle_set_current("standard")
assert back == {"ok": True, "current": "Standard", "previous": "ISOCP", "changed": True}
assert (
backend._doc.entitydb.get((await backend.entity_create_text("x", 0, 0)).handle).dxf.style
== "Standard"
)
async def test_textstyle_unknown_font_is_written_but_reported_unresolved(backend):
result = await backend.textstyle_create("ODD", "acadmcp-missing-font.ttf", 3.5, 0.8, 15)
assert result["font_resolved"] is False and result["current"] is False
style = backend._doc.styles.get("ODD")
assert style.dxf.font == "acadmcp-missing-font.ttf"
assert style.dxf.height == 3.5 and style.dxf.width == 0.8 and style.dxf.oblique == 15.0
async def test_textstyle_refusals_write_nothing(backend):
await backend.textstyle_create("ISOCP", "isocp.shx")
with pytest.raises(ValueError, match="already exists"):
await backend.textstyle_create("isocp", "isocp.shx")
with pytest.raises(ValueError, match="width_factor"):
await backend.textstyle_create("Z", "arial.ttf", width_factor=0)
with pytest.raises(ValueError, match="oblique_deg"):
await backend.textstyle_create("Z", "arial.ttf", oblique_deg=90)
with pytest.raises(ValueError, match="height"):
await backend.textstyle_create("Z", "arial.ttf", height=-1)
with pytest.raises(ValueError, match="font"):
await backend.textstyle_create("Z", "")
assert not backend._doc.styles.has_entry("Z")
with pytest.raises(ValueError, match="does not exist"):
await backend.textstyle_set_current("NOPE")
async def test_mleaderstyle_create_iso_and_list(backend):
result = await backend.mleaderstyle_create("ISO", resolve_mleaderstyle("iso", None))
assert result["ok"] is True and result["textstyle_created"] is True
assert result["values"] == {
"arrow_size": 2.5,
"landing_gap": 1.0,
"text_style": "ISOCP",
"text_height": 2.5,
}
style = backend._doc.mleader_styles.get("ISO")
assert style.dxf.arrow_head_size == 2.5 and style.dxf.landing_gap_size == 1.0
assert backend._doc.entitydb[style.dxf.text_style_handle].dxf.name == "ISOCP"
rows = await backend.mleaderstyle_list()
assert rows == [
{
"name": "ISO",
"arrow_size": 2.5,
"landing_gap": 1.0,
"text_style": "ISOCP",
"text_height": 2.5,
"values_available": True,
},
{
"name": "Standard",
"arrow_size": 4.0,
"landing_gap": 2.0,
"text_style": "Standard",
"text_height": 4.0,
"values_available": True,
},
]
async def test_mleaderstyle_refusals_write_nothing(backend):
await backend.mleaderstyle_create("ISO", resolve_mleaderstyle("iso", None))
with pytest.raises(ValueError, match="already exists"):
await backend.mleaderstyle_create("iso", resolve_mleaderstyle("iso", None))
with pytest.raises(ValueError, match="text_style"):
await backend.mleaderstyle_create("X", resolve_mleaderstyle("iso", {"text_style": "NOPE"}))
with pytest.raises(ValueError, match="missing"):
await backend.mleaderstyle_create("X", {"arrow_size": 2.5})
assert not backend._doc.mleader_styles.has_entry("X")
async def test_mleaderstyle_is_not_a_capability_boundary_on_either_engine(backend):
"""The v1.6 plan declared `mleaderstyle` COM-unsupported ("ActiveX exposes
no MLeaderStyle collection"). The type library says otherwise: the
ACAD_MLEADERSTYLE dictionary items are IAcadMLeaderStyle objects and
AddObject(name, "AcDbMLeaderStyle") creates one. A refusal resting on a
false premise is exactly what CLAUDE.md forbids `@capability` for, so
neither map declares the key and neither engine inherits a default."""
from backends.com_backend import ComBackend
assert "mleaderstyle" not in backend.capabilities().to_dict()["features"]
assert "mleaderstyle" not in ComBackend().capabilities().to_dict()["features"]
for engine in (type(backend), ComBackend):
assert not is_capability_default(engine, "mleaderstyle_create")
assert not is_capability_default(engine, "mleaderstyle_list")
# ── live engine, against a fake ActiveX surface ──────────────────────────────
class _FakeStyle:
def __init__(self, name, calls):
self.Name = name
self._calls = calls
self.fontFile = "txt.shx"
self.Width = 1.0
self.ObliqueAngle = 0.0
self.Height = 0.0
self.saved: dict | None = None # the DIM* values this style holds, once saved
def CopyFrom(self, source):
# AcadDimStyle.CopyFrom(document) saves the document's current
# dimension settings into this style.
self._calls.append(("CopyFrom", self.Name, source))
self.saved = dict(source.variables)
class _FakeCollection:
def __init__(self, kind, calls, *names):
self._kind = kind
self._calls = calls
self.entries = [_FakeStyle(name, calls) for name in names]
@property
def Count(self):
return len(self.entries)
def Item(self, index):
return self.entries[index]
def Add(self, name):
self._calls.append((f"{self._kind}.Add", name))
style = _FakeStyle(name, self._calls)
self.entries.append(style)
return style
class _FakeBlock:
def __init__(self, *entities):
self.entities = list(entities)
@property
def Count(self):
return len(self.entities)
def Item(self, index):
return self.entities[index]
class _FakeLayouts:
def __init__(self, *blocks):
self.layouts = [types.SimpleNamespace(Block=block) for block in blocks]
@property
def Count(self):
return len(self.layouts)
def Item(self, index):
return self.layouts[index]
class _FakeMLeaderStyle:
"""An AcadMLeaderStyle: the properties acax25enu.tlb's IAcadMLeaderStyle
exposes that the backend reads or writes (doubles in drawing units, the
text style by name), with AutoCAD's defaults for a fresh style."""
PROPERTIES = ("ArrowSize", "LandingGap", "TextHeight", "TextStyle")
def __init__(self, name, calls):
self.Name = name
self.ObjectName = "AcDbMLeaderStyle"
self.ArrowSize, self.LandingGap, self.TextHeight, self.TextStyle = 4.0, 2.0, 4.0, "Standard"
self._calls = calls # last: property writes are recorded from here on
def __setattr__(self, key, value):
if key in self.PROPERTIES and "_calls" in vars(self):
self._calls.append(("MLeaderStyle." + key, self.Name, value))
super().__setattr__(key, value)
class _NarrowedToIAcadObject:
"""What pywin32 hands back for ``Dictionaries.Item``, ``Dictionary.Item``
and ``Dictionary.AddObject`` once a makepy cache for the AutoCAD type
library exists: acax25enu.tlb declares all three as returning
``IAcadObject*``, so the result is the gen_py ``IAcadObject`` class, which
exposes only IAcadObject members and raises AttributeError for everything
the runtime class (``IAcadDictionary``, ``IAcadMLeaderStyle``) adds — on a
read *and* on a property write. The full object is reachable only through
``_oleobj_``, which is how the backend must un-narrow it (this is exactly
what happened live on AutoCAD 2026 before the fix)."""
IACADOBJECT_MEMBERS = frozenset(
{
"Application",
"Database",
"Document",
"Handle",
"HasExtensionDictionary",
"ObjectID",
"ObjectName",
"OwnerID",
"Delete",
"Erase",
"GetExtensionDictionary",
"GetXData",
"SetXData",
}
)
def __init__(self, raw):
object.__setattr__(self, "_oleobj_", raw)
def __getattr__(self, key):
if key in self.IACADOBJECT_MEMBERS:
return getattr(self._oleobj_, key)
raise AttributeError(
"'<win32com.gen_py.AutoCAD 2025 Type Library.IAcadObject instance>' "
f"object has no attribute {key!r}"
)
def __setattr__(self, key, value):
# gen_py's DispatchBaseClass.__setattr__ consults _prop_map_put_, and
# IAcadObject's is empty: every property write raises.
raise AttributeError(
"'<win32com.gen_py.AutoCAD 2025 Type Library.IAcadObject instance>' "
f"object has no attribute {key!r}"
)
class _FakeDictionary:
"""The ACAD_MLEADERSTYLE dictionary: Count/Item/GetName over its objects
and AddObject(keyword, class_name), the documented VBA route. Item and
AddObject hand their result over narrowed to IAcadObject, as pywin32
does."""
def __init__(self, calls, *names):
self._calls = calls
self.ObjectName = "AcDbDictionary"
self.objects = [_FakeMLeaderStyle(name, calls) for name in names]
@property
def Count(self):
return len(self.objects)
def Item(self, index):
return _NarrowedToIAcadObject(self.objects[index])
def GetName(self, obj):
# ActiveX takes the object itself; a narrowed wrapper resolves to the
# same object, so both spellings name it.
raw = getattr(obj, "_oleobj_", obj)
assert raw in self.objects, "GetName: object is not in this dictionary"
return raw.Name
def AddObject(self, keyword, class_name):
self._calls.append(("Dictionary.AddObject", keyword, class_name))
if class_name != "AcDbMLeaderStyle":
raise RuntimeError(f"cannot create {class_name} here")
style = _FakeMLeaderStyle(keyword, self._calls)
self.objects.append(style)
return _NarrowedToIAcadObject(style)
class _FakeDictionaries:
"""``doc.Dictionaries``: Item is declared IAcadObject* (narrowed); Add is
declared IAcadDictionary* and comes back with its full surface."""
def __init__(self, calls, entries):
self._calls = calls
self.entries = entries
def Item(self, name):
if name not in self.entries:
raise RuntimeError(f"no dictionary {name}")
return _NarrowedToIAcadObject(self.entries[name])
def Add(self, name):
self._calls.append(("Dictionaries.Add", name))
if name in self.entries:
raise RuntimeError(f"dictionary {name} already exists")
self.entries[name] = _FakeDictionary(self._calls)
return self.entries[name]
CURRENT_DIMVARS = {
"DIMTXT": 2.5,
"DIMASZ": 2.5,
"DIMEXE": 1.25,
"DIMEXO": 0.625,
"DIMGAP": 0.625,
"DIMTAD": 1,
"DIMTIH": 0,
"DIMTOH": 0,
"DIMDEC": 2,
"DIMDSEP": ".",
"DIMLUNIT": 2,
"DIMZIN": 8,
"DIMBLK": "",
"DIMTXSTY": "Standard",
"DIMLWD": -2,
"DIMLWE": -2,
"DIMSCALE": 1.0,
}
class _FakeDocument:
def __init__(self):
self.calls: list[tuple] = []
self.DimStyles = _FakeCollection("DimStyles", self.calls, "Standard")
self.TextStyles = _FakeCollection("TextStyles", self.calls, "Standard")
self.variables = dict(CURRENT_DIMVARS)
self._active_dim = self.DimStyles.entries[0]
self._active_dim.saved = dict(CURRENT_DIMVARS)
self._active_text = self.TextStyles.entries[0]
dim = types.SimpleNamespace(
ObjectName="AcDbRotatedDimension", StyleName="ISO-25", Handle="2A"
)
line = types.SimpleNamespace(ObjectName="AcDbLine", Handle="2B")
sheet_dim = types.SimpleNamespace(
ObjectName="AcDbAlignedDimension", StyleName="Standard", Handle="2C"
)
self.Layouts = _FakeLayouts(_FakeBlock(dim, line), _FakeBlock(sheet_dim))
self.Dictionaries = _FakeDictionaries(
self.calls,
{"ACAD_MLEADERSTYLE": _FakeDictionary(self.calls, "Standard", "Annotative")},
)
@property
def mleader_dictionary(self) -> _FakeDictionary:
"""The raw ACAD_MLEADERSTYLE dictionary, for test setup and assertions
(the backend only ever sees it narrowed through ``Dictionaries.Item``)."""
return self.Dictionaries.entries["ACAD_MLEADERSTYLE"]
def GetVariable(self, name):
return self.variables[name]
def SetVariable(self, name, value):
self.calls.append(("SetVariable", name, value))
self.variables[name] = value
@property
def ActiveDimStyle(self):
return self._active_dim
@ActiveDimStyle.setter
def ActiveDimStyle(self, style):
# Making a style current restores its saved settings as the current
# DIM* variables and discards unsaved overrides (AutoCAD's -DIMSTYLE
# Restore rule; scripts/smoke_settings_com.py confirms it live). A
# style never saved (fresh DimStyles.Add) keeps the current variables.
self.calls.append(("ActiveDimStyle", style.Name))
self._active_dim = style
if style.saved is not None:
self.variables.update(style.saved)
@property
def ActiveTextStyle(self):
return self._active_text
@ActiveTextStyle.setter
def ActiveTextStyle(self, style):
self.calls.append(("ActiveTextStyle", style.Name))
self._active_text = style
@pytest.fixture
def com_backend(monkeypatch):
pytest.importorskip("win32com.client", reason="pywin32 not installed")
from backends import com_backend as module
document = _FakeDocument()
app = types.SimpleNamespace(
Preferences=types.SimpleNamespace(Files=types.SimpleNamespace(SupportPath=""))
)
monkeypatch.setattr(module, "_acad_doc", lambda: document)
monkeypatch.setattr(module, "_acad_app", lambda: app)
monkeypatch.setattr(module, "_regen", lambda: None)
backend = module.ComBackend()
async def _run_inline(func, *args, **kwargs):
return func(*args, **kwargs)
monkeypatch.setattr(backend, "_run", _run_inline)
return backend, document
async def test_com_create_sets_variables_then_copies_from_the_document(com_backend):
backend, document = com_backend
result = await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None))
assert result["ok"] is True and result["current"] is False
assert result["textstyle_created"] is True
names = [call[0] for call in document.calls]
assert names[:2] == ["TextStyles.Add", "DimStyles.Add"], (
"the text style exists before DIMTXSTY names it"
)
assert document.calls[2] == ("ActiveDimStyle", "ISO-25")
sets = [call for call in document.calls if call[0] == "SetVariable"]
assert len(sets) == 17
assert ("SetVariable", "DIMDSEP", ",") in sets, "DIMDSEP is a string on ActiveX"
assert ("SetVariable", "DIMTXSTY", "ISOCP") in sets
assert ("SetVariable", "DIMTXT", 2.5) in sets and ("SetVariable", "DIMTAD", 1) in sets
copy_index = names.index("CopyFrom")
assert copy_index > names.index("SetVariable")
assert document.calls[copy_index] == ("CopyFrom", "ISO-25", document)
assert document.calls[-1] == ("ActiveDimStyle", "Standard"), "restored: set_current was False"
assert result["values"]["DIMDSEP"] == "," and result["values"]["DIMTXSTY"] == "ISOCP"
isocp = document.TextStyles.entries[-1]
assert isocp.Name == "ISOCP" and isocp.fontFile == "isocp.shx"
async def test_com_create_set_current_keeps_the_new_style_active(com_backend):
backend, document = com_backend
result = await backend.dimstyle_create("ANSI", resolve_dimstyle("ansi", None), set_current=True)
assert result["current"] is True
activations = [c for c in document.calls if c[0] == "ActiveDimStyle"]
assert activations == [("ActiveDimStyle", "ANSI")]
assert document.ActiveDimStyle.Name == "ANSI"
async def test_com_create_refuses_before_touching_activex(com_backend):
backend, document = com_backend
with pytest.raises(ValueError, match="already exists"):
await backend.dimstyle_create("standard", resolve_dimstyle("iso-25", None))
with pytest.raises(ValueError, match="DIMTXSTY"):
await backend.dimstyle_create("X", resolve_dimstyle("iso-25", {"DIMTXSTY": "NOPE"}))
with pytest.raises(ValueError, match="DIMDEC"):
await backend.dimstyle_create("X", {"DIMDEC": 9})
assert document.calls == []
async def test_com_list_reports_values_for_the_current_style_only(com_backend):
backend, document = com_backend
await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None))
rows = await backend.dimstyle_list()
assert [(r["name"], r["current"], r["values_available"]) for r in rows] == [
("ISO-25", False, False),
("Standard", True, True),
]
assert rows[0]["values"] is None
assert rows[1]["values"]["DIMDSEP"] == "." and tuple(rows[1]["values"]) == PRESET_VARIABLES
async def test_com_modify_switches_saves_and_switches_back(com_backend):
backend, document = com_backend
await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None))
document.calls.clear()
result = await backend.dimstyle_modify("iso-25", {"DIMDEC": 3, "DIMTXT": 2.5})
assert result["name"] == "ISO-25"
assert result["changed"] == {"DIMDEC": [2, 3]}
assert result["dimensions_using_style"] == ["2A"], "model and paper space, dimensions only"
assert result["rerender_required"] is False, "AutoCAD re-renders on regen"
assert document.calls == [
("ActiveDimStyle", "ISO-25"),
("SetVariable", "DIMDEC", 3),
("CopyFrom", "ISO-25", document),
("ActiveDimStyle", "Standard"),
]
document.calls.clear()
again = await backend.dimstyle_modify("ISO-25", {"DIMDEC": 3})
assert again["changed"] == {}
assert [c[0] for c in document.calls] == ["ActiveDimStyle", "ActiveDimStyle"], (
"no CopyFrom when nothing moved"
)
with pytest.raises(ValueError, match="does not exist"):
await backend.dimstyle_modify("NOPE", {"DIMDEC": 1})
async def test_com_set_current(com_backend):
backend, document = com_backend
await backend.dimstyle_create("ISO-25", resolve_dimstyle("iso-25", None))
result = await backend.dimstyle_set_current("ISO-25")
assert result == {"ok": True, "current": "ISO-25", "previous": "Standard", "changed": True}
assert document.ActiveDimStyle.Name == "ISO-25"
with pytest.raises(ValueError, match="does not exist"):
await backend.dimstyle_set_current("NOPE")
async def test_com_textstyle_create_sets_font_width_oblique_height(com_backend):
backend, document = com_backend
result = await backend.textstyle_create("ISOCP", "isocp", 0.0, 1.0, 0.0, set_current=True)
assert result == {
"ok": True,
"name": "ISOCP",
"font": "isocp.shx",
"font_resolved": True,
"current": True,
}
style = document.TextStyles.entries[-1]
assert (style.fontFile, style.Width, style.ObliqueAngle, style.Height) == (
"isocp.shx",
1.0,
0.0,
0.0,
)
assert document.ActiveTextStyle.Name == "ISOCP"
odd = await backend.textstyle_create("ODD", "acadmcp-missing-font.ttf", 3.5, 0.8, 15.0)
assert odd["font_resolved"] is False
assert document.TextStyles.entries[-1].ObliqueAngle == pytest.approx(0.2617993878), "radians"
rows = await backend.textstyle_list()
assert [(r["name"], r["current"]) for r in rows] == [
("ISOCP", True),
("ODD", False),
("Standard", False),
]
assert rows[1]["oblique_deg"] == pytest.approx(15.0)
with pytest.raises(ValueError, match="already exists"):
await backend.textstyle_create("isocp", "isocp.shx")
back = await backend.textstyle_set_current("standard")
assert back == {"ok": True, "current": "Standard", "previous": "ISOCP", "changed": True}
async def test_com_mleaderstyle_list_reads_the_values_off_the_dictionary_objects(com_backend):
backend, document = com_backend
dictionary = document.mleader_dictionary
dictionary.objects[1].ArrowSize = 3.0
dictionary.objects[1].TextStyle = "ISOCP"
document.calls.clear() # fixture setup, not backend calls
rows = await backend.mleaderstyle_list()
assert rows == [
{
"name": "Annotative",
"arrow_size": 3.0,
"landing_gap": 2.0,
"text_style": "ISOCP",
"text_height": 4.0,
"values_available": True,
},
{
"name": "Standard",
"arrow_size": 4.0,
"landing_gap": 2.0,
"text_style": "Standard",
"text_height": 4.0,
"values_available": True,
},
]
assert document.calls == [], "a list reads; it writes nothing"
async def test_com_mleaderstyle_create_adds_the_object_then_writes_its_properties(com_backend):
backend, document = com_backend
result = await backend.mleaderstyle_create("ISO", resolve_mleaderstyle("iso", None))
assert result == {
"ok": True,
"name": "ISO",
"values": {
"arrow_size": 2.5,
"landing_gap": 1.0,
"text_style": "ISOCP",
"text_height": 2.5,
},
"textstyle_created": True,
}
names = [call[0] for call in document.calls]
assert names.index("TextStyles.Add") < names.index("Dictionary.AddObject"), (
"the text style exists before TextStyle names it"
)
assert ("Dictionary.AddObject", "ISO", "AcDbMLeaderStyle") in document.calls
writes = [call for call in document.calls if call[0].startswith("MLeaderStyle.")]
assert writes == [
("MLeaderStyle.ArrowSize", "ISO", 2.5),
("MLeaderStyle.LandingGap", "ISO", 1.0),
("MLeaderStyle.TextHeight", "ISO", 2.5),
("MLeaderStyle.TextStyle", "ISO", "ISOCP"),
]
rows = {row["name"]: row for row in await backend.mleaderstyle_list()}
assert rows["ISO"] == {**result["values"], "name": "ISO", "values_available": True}
async def test_com_mleaderstyle_refusals_write_nothing(com_backend):
backend, document = com_backend
dictionary = document.mleader_dictionary
with pytest.raises(ValueError, match="already exists"):
await backend.mleaderstyle_create("standard", resolve_mleaderstyle("iso", None))
with pytest.raises(ValueError, match="text_style"):
await backend.mleaderstyle_create("X", resolve_mleaderstyle("iso", {"text_style": "NOPE"}))
with pytest.raises(ValueError, match="missing"):
await backend.mleaderstyle_create("X", {"arrow_size": 2.5})
with pytest.raises(ValueError, match="arrow_size"):
await backend.mleaderstyle_create("X", {**resolve_mleaderstyle("iso"), "arrow_size": 0})
assert document.calls == [], "nothing reached ActiveX"
assert [obj.Name for obj in dictionary.objects] == ["Standard", "Annotative"]
async def test_com_dictionary_route_is_narrowed_to_iacadobject_until_unwrapped(com_backend):
"""The failure mode as it happened live (AutoCAD 2026, pywin32 with a
makepy cache): every object the dictionary route returns is wrapped as
the DECLARED type, IAcadObject, so Count / Item / GetName on the
dictionary and ArrowSize on a style raise AttributeError. The fake
models that narrowing, and `_com_unnarrow` is the one door through it —
a raw non-COM `_oleobj_` is handed back as-is, an object without one is
returned unchanged."""
from backends.com_backend import _com_unnarrow
backend, document = com_backend
narrowed = document.Dictionaries.Item("ACAD_MLEADERSTYLE")
assert narrowed.ObjectName == "AcDbDictionary", "IAcadObject members still answer"
with pytest.raises(AttributeError, match="no attribute 'Count'"):
getattr(narrowed, "Count") # noqa: B009 — the read itself is what raises
with pytest.raises(AttributeError, match="no attribute 'Item'"):
narrowed.Item(0)
raw = document.mleader_dictionary
assert _com_unnarrow(narrowed) is raw
assert _com_unnarrow(raw) is raw, "an object without _oleobj_ is returned unchanged"
item = raw.Item(0)
assert item.ObjectName == "AcDbMLeaderStyle"
with pytest.raises(AttributeError, match="no attribute 'ArrowSize'"):
getattr(item, "ArrowSize") # noqa: B009
with pytest.raises(AttributeError, match="no attribute 'ArrowSize'"):
item.ArrowSize = 2.5
assert _com_unnarrow(item) is raw.objects[0]
added = raw.AddObject("LDR-A", "AcDbMLeaderStyle")
with pytest.raises(AttributeError, match="no attribute 'TextStyle'"):
added.TextStyle = "ISOCP"
assert _com_unnarrow(added) is raw.objects[-1]
assert raw.GetName(added) == raw.GetName(raw.objects[-1]) == "LDR-A"
async def test_com_mleaderstyle_create_adds_the_dictionary_to_a_drawing_without_one(com_backend):
"""A foreign drawing may lack ACAD_MLEADERSTYLE: list reports no styles
(and never adds the dictionary), create adds it through Dictionaries.Add
— whose IAcadDictionary* result is un-narrowed like the rest — and then
the style."""
backend, document = com_backend
del document.Dictionaries.entries["ACAD_MLEADERSTYLE"]
assert await backend.mleaderstyle_list() == []
assert document.calls == [] and "ACAD_MLEADERSTYLE" not in document.Dictionaries.entries
result = await backend.mleaderstyle_create("ISO", resolve_mleaderstyle("iso", None))
assert result["ok"] is True and result["name"] == "ISO"
names = [call[0] for call in document.calls]
assert names.index("Dictionaries.Add") < names.index("Dictionary.AddObject")
assert ("Dictionaries.Add", "ACAD_MLEADERSTYLE") in document.calls
assert [obj.Name for obj in document.mleader_dictionary.objects] == ["ISO"]
rows = await backend.mleaderstyle_list()
assert [row["name"] for row in rows] == ["ISO"] and rows[0]["arrow_size"] == 2.5
# ── the MCP tools (SECTION 18) ──────────────────────────────────────────────
STYLE_TOOLS = {
"dimstyle_list",
"dimstyle_create",
"dimstyle_modify",
"dimstyle_set_current",
"textstyle_list",
"textstyle_create",
"textstyle_set_current",
"mleaderstyle_list",
"mleaderstyle_create",
}
class _Ctx:
"""Enough of a fastmcp Context for a direct tool call (tests/test_capabilities.py)."""
def __init__(self, backend):
self.lifespan_context = {"backend": backend}
async def info(self, *_args, **_kwargs):
return None
async def test_style_tools_are_registered_and_grouped_under_styles():
import server
names = {t.name for t in await server._registered_tools() if getattr(t, "name", None)}
assert STYLE_TOOLS <= names
groups = await server._tool_groups()
assert STYLE_TOOLS <= set(groups["styles"]), "the style tag must win over query/create/modify"
for other in ("layers", "drawing", "entity_query", "entity_creation", "entity_modification"):
assert not STYLE_TOOLS & set(groups.get(other, [])), other
async def test_dimstyle_tools_resolve_the_preset_then_write(backend):
import server
ctx = _Ctx(backend)
created = await server.dimstyle_create(
name="ISO-25", preset="iso-25", overrides={"dimdec": 3}, set_current=True, ctx=ctx
)
assert created["current"] is True and created["values"]["DIMDEC"] == 3
listed = await server.dimstyle_list(ctx=ctx)
assert listed["count"] == 2 and listed["current"] == "ISO-25"
modified = await server.dimstyle_modify(name="ISO-25", overrides={"DIMTXT": 3.5}, ctx=ctx)
assert modified["changed"] == {"DIMTXT": [2.5, 3.5]}
switched = await server.dimstyle_set_current(name="Standard", ctx=ctx)
assert switched["previous"] == "ISO-25" and switched["current"] == "Standard"
async def test_dimstyle_create_tool_refuses_an_unknown_override_before_writing(backend):
import server
ctx = _Ctx(backend)
with pytest.raises(ValueError, match="DIMFOO"):
await server.dimstyle_create(name="X", overrides={"DIMFOO": 1}, ctx=ctx)
with pytest.raises(ValueError, match="preset"):
await server.dimstyle_create(name="X", preset="din", ctx=ctx)
assert (await server.dimstyle_list(ctx=ctx))["count"] == 1
async def test_textstyle_and_mleaderstyle_tools_round_trip(backend):
import server
ctx = _Ctx(backend)
made = await server.textstyle_create(name="ISOCP", font="isocp", set_current=True, ctx=ctx)
assert made["font_resolved"] is True
assert (await server.textstyle_list(ctx=ctx))["current"] == "ISOCP"
assert (await server.textstyle_set_current(name="Standard", ctx=ctx))["previous"] == "ISOCP"
leader = await server.mleaderstyle_create(
name="ISO", preset="iso", overrides={"arrow_size": 3}, ctx=ctx
)
assert leader["values"]["arrow_size"] == 3.0 and leader["textstyle_created"] is False
assert (await server.mleaderstyle_list(ctx=ctx))["count"] == 2
with pytest.raises(ValueError, match="preset"):
await server.mleaderstyle_create(name="X", preset="din", ctx=ctx)