Add canonical MusicXML validation tests

tests/test_canonical_musicxml_additional.py

@@ -0,0 +1,59 @@
+"""Focused tests for ``iav.canonical_musicxml`` validation branches."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+from iav.canonical_musicxml import analyze_musicxml_file
+
+
+def _dummy_xml_path(tmp_path: Path, name: str = "case.musicxml") -> Path:
+    path = tmp_path / name
+    path.write_bytes(b"<score-partwise/>")
+    return path
+
+
+def test_analyze_musicxml_file_raises_when_notes_skipped(tmp_path, monkeypatch):
+    xml_path = _dummy_xml_path(tmp_path)
+
+    def fake_parse(_data):
+        return [("C", 0.0, 4), ("E", 0.0, 4)], 1
+
+    monkeypatch.setattr("iav.canonical_musicxml.parse_musicxml_bytes", fake_parse)
+
+    with pytest.raises(ValueError, match="skipped") as excinfo:
+        analyze_musicxml_file(xml_path)
+
+    assert str(xml_path) in str(excinfo.value)
+
+
+def test_analyze_musicxml_file_raises_when_fewer_than_two_notes(tmp_path, monkeypatch):
+    xml_path = _dummy_xml_path(tmp_path, "solo.musicxml")
+
+    def fake_parse(_data):
+        return [("C", 0.0, 4)], 0
+
+    monkeypatch.setattr("iav.canonical_musicxml.parse_musicxml_bytes", fake_parse)
+
+    with pytest.raises(ValueError, match="fewer than 2 notes") as excinfo:
+        analyze_musicxml_file(xml_path)
+
+    assert str(xml_path) in str(excinfo.value)
+
+
+def test_analyze_musicxml_file_valid_dyad_returns_metrics(tmp_path, monkeypatch):
+    xml_path = _dummy_xml_path(tmp_path, "dyad.musicxml")
+
+    def fake_parse(_data):
+        return [("C", 0.0, 4), ("G", 0.0, 4)], 0
+
+    monkeypatch.setattr("iav.canonical_musicxml.parse_musicxml_bytes", fake_parse)
+
+    result = analyze_musicxml_file(xml_path)
+
+    assert "pair_score" in result
+    assert "chain_score" in result
+    assert "H_headline_pairwise" in result
+    assert result["pair_score"] == pytest.approx(1.0)