[OASIS] raise PatternError for unsuppored caps

masque/test/test_oasis.py

@@ -1,9 +1,12 @@
+import io
 from pathlib import Path
 import pytest
 from numpy.testing import assert_equal
 
+from ..error import PatternError
 from ..pattern import Pattern
 from ..library import Library
+from ..shapes import Path as MPath
 
 
 def test_oasis_roundtrip(tmp_path: Path) -> None:
@@ -42,3 +45,16 @@ def test_oasis_properties_to_annotations_merges_repeated_keys() -> None:
     )
 
     assert annotations == {"k": [1, 2, 3]}
+
+
+def test_oasis_write_rejects_circle_path_caps() -> None:
+    pytest.importorskip("fatamorgana")
+    from ..file import oasis
+
+    lib = Library()
+    pat = Pattern()
+    pat.path((1, 0), vertices=[[0, 0], [10, 0]], width=2, cap=MPath.Cap.Circle)
+    lib["cell1"] = pat
+
+    with pytest.raises(PatternError, match="does not support path cap"):
+        oasis.write(lib, io.BytesIO(), units_per_micron=1000)