init public release

tests/unit/test_replace_single_quotes.py

@@ -0,0 +1,63 @@
+"""Unit tests for ``replace_single_quotes``.
+
+This is the cleanest function to test: pure, recursive, no I/O. It escapes
+single quotes (``'`` -> ``''``) for the Neo4j import, recursing through
+dicts and lists and leaving non-strings untouched.
+"""
+
+import pytest
+from hypothesis import given, strategies as st
+
+import import_fhir_to_nx_diGraph as pipeline
+
+
+def test_single_quote_in_string_is_doubled():
+    assert pipeline.replace_single_quotes("O'Brien") == "O''Brien"
+
+
+def test_string_without_quotes_unchanged():
+    assert pipeline.replace_single_quotes("Mueller") == "Mueller"
+
+
+def test_empty_string_unchanged():
+    assert pipeline.replace_single_quotes("") == ""
+
+
+@pytest.mark.parametrize("value", [0, 1, 3.14, None, True, False])
+def test_non_string_scalars_unchanged(value):
+    assert pipeline.replace_single_quotes(value) is value
+
+
+def test_nested_dict_recurses():
+    data = {"name": "O'Hara", "nested": {"note": "it's fine"}}
+    assert pipeline.replace_single_quotes(data) == {
+        "name": "O''Hara",
+        "nested": {"note": "it''s fine"},
+    }
+
+
+def test_list_recurses():
+    assert pipeline.replace_single_quotes(["a'b", 2, "c"]) == ["a''b", 2, "c"]
+
+
+def test_dict_keys_are_not_escaped():
+    # Only values are recursed into; keys are left as-is.
+    result = pipeline.replace_single_quotes({"it's": "fine"})
+    assert list(result.keys()) == ["it's"]
+    assert result["it's"] == "fine"
+
+
+# --- Property-based checks -------------------------------------------------
+
+@given(st.text())
+def test_every_quote_is_doubled(text):
+    # The function is intentionally NOT idempotent: each pass doubles the
+    # quote count. This pins that contract so a future "fix" is a conscious
+    # choice rather than a silent behaviour change.
+    result = pipeline.replace_single_quotes(text)
+    assert result.count("'") == 2 * text.count("'")
+
+
+@given(st.lists(st.one_of(st.integers(), st.text())))
+def test_list_length_preserved(items):
+    assert len(pipeline.replace_single_quotes(items)) == len(items)