v1.2.0

Adds production-grade engineering features and tools: 2D GD&T (feature control frames + datum features) via engineering/gdt.py, ISO‑129 dimension tolerance support (engineering/tolerances.py) and an ezdxf/COM plumbing for toleranced dims, a scalar drawing score + invalidity ratio (engineering/scoring.py) wired into drawing_finalize, in-place entity editors (entity_edit_text/entity_edit_geometry), and a friendly drawing_settings facade. Includes server tool wiring, COM/ezdxf backend implementations, datum-consistency critique, many unit tests, README/CLAUDE/CHANGELOG updates, and a version bump to 1.2.0. Also corrects COM backend capability label (entities_2d).

tests/test_dimension_tolerances.py

@@ -0,0 +1,108 @@
+"""Tests for ISO 129 dimension tolerances (engineering/tolerances.py + the
+ezdxf dimension_* override plumbing)."""
+
+from __future__ import annotations
+
+import pytest
+
+from engineering.tolerances import build_dim_override
+
+pytestmark = pytest.mark.asyncio
+
+
+# ── pure: override builder ──────────────────────────────────────────────────
+
+
+async def test_none_mode_is_empty():
+    override, text = build_dim_override(tol_mode="none")
+    assert override == {}
+    assert text is None
+
+
+async def test_symmetric_sets_equal_tp_tm():
+    override, _ = build_dim_override(tol_upper=0.05, tol_mode="symmetric")
+    assert override["dimtol"] == 1
+    assert override["dimtp"] == 0.05
+    assert override["dimtm"] == 0.05
+
+
+async def test_deviation_sets_distinct_tp_tm():
+    override, _ = build_dim_override(0.02, 0.01, "deviation")
+    assert override["dimtp"] == 0.02
+    assert override["dimtm"] == 0.01
+    assert override["dimtol"] == 1
+
+
+async def test_limit_mode_sets_dimlim():
+    override, _ = build_dim_override(0.02, 0.01, "limit")
+    assert override["dimlim"] == 1
+    assert override["dimtol"] == 0
+
+
+async def test_basic_mode_boxes_text():
+    override, _ = build_dim_override(tol_mode="basic")
+    assert override["dimgap"] < 0
+
+
+async def test_text_override_passthrough():
+    _, text = build_dim_override(text_override="20 H7")
+    assert text == "20 H7"
+
+
+async def test_bad_mode_and_missing_values_raise():
+    with pytest.raises(ValueError):
+        build_dim_override(tol_mode="wat")
+    with pytest.raises(ValueError):
+        build_dim_override(tol_mode="symmetric")  # no tol_upper
+    with pytest.raises(ValueError):
+        build_dim_override(0.02, None, "deviation")  # no tol_lower
+
+
+# ── backend: toleranced dims are created without error ──────────────────────
+
+
+async def test_linear_dim_with_symmetric_tolerance(backend):
+    await backend.drawing_apply_iso_layers("mech")
+    dim = await backend.dimension_linear(
+        0,
+        0,
+        100,
+        0,
+        50,
+        20,
+        layer="DIM",
+        tol_upper=0.05,
+        tol_mode="symmetric",
+    )
+    assert dim.handle
+    assert dim.type in ("DIMENSION", "DIMLINEAR")
+
+
+async def test_diameter_dim_with_text_override(backend):
+    await backend.drawing_apply_iso_layers("mech")
+    c = await backend.entity_create_circle(0, 0, 10, layer="GEOMETRY")
+    assert c.handle
+    dim = await backend.dimension_diameter(
+        -10,
+        0,
+        10,
+        0,
+        layer="DIM",
+        text_override="<> H7",
+    )
+    assert dim.handle
+
+
+async def test_radius_dim_with_deviation_tolerance(backend):
+    await backend.drawing_apply_iso_layers("mech")
+    dim = await backend.dimension_radius(
+        0,
+        0,
+        10,
+        0,
+        layer="DIM",
+        tol_upper=0.03,
+        tol_lower=0.01,
+        tol_mode="deviation",
+    )
+    assert dim.handle