Fix every real lint finding and drop degenerate splice fragments

ingestion/tests/test_segment_units.py

@@ -0,0 +1,30 @@
+from ingestion.segment.units import normalize_unit_token, validate_unit_tokens
+
+
+def test_clean_unit_passes_through():
+    assert normalize_unit_token("mg") == "mg"
+    assert normalize_unit_token("mcg") == "mcg"
+    assert normalize_unit_token("mmol") == "mmol"
+
+
+def test_stray_whitespace_split_recovered_by_analogy_to_atc():
+    assert normalize_unit_token("m g") == "mg"
+    assert normalize_unit_token("m cg") == "mcg"
+
+
+def test_case_insensitive():
+    assert normalize_unit_token("MG") == "mg"
+
+
+def test_unknown_token_not_recovered():
+    assert normalize_unit_token("xyz") is None
+    assert normalize_unit_token("") is None
+
+
+def test_validate_unit_tokens_flags_only_bad_ones():
+    bad = validate_unit_tokens(["mg", "mcg", "xyz", "ml"])
+    assert bad == ["xyz"]
+
+
+def test_validate_unit_tokens_empty_when_all_valid():
+    assert validate_unit_tokens(["mg", "mcg", "mmol"]) == []