Skip invalid FAISS migration JSON (#1547)

tests/test_migrate_faiss_to_chroma.py

@@ -0,0 +1,36 @@
+import importlib.util
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def _load_module():
+    path = ROOT / "scripts" / "migrate_faiss_to_chroma.py"
+    spec = importlib.util.spec_from_file_location("migrate_faiss_to_chroma", path)
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_memory_map_skips_invalid_rows():
+    mod = _load_module()
+
+    assert mod._memory_map([
+        {"id": "m1", "text": "hello"},
+        "bad-row",
+        None,
+        {"text": "missing id"},
+    ]) == {"m1": {"id": "m1", "text": "hello"}}
+
+
+def test_rag_docstore_requires_matching_lists():
+    mod = _load_module()
+
+    assert mod._rag_docstore([]) == ([], [], [])
+    assert mod._rag_docstore({"ids": ["a"], "documents": ["doc"], "metadatas": "bad"}) == ([], [], [])
+    assert mod._rag_docstore({
+        "ids": ["a", "b"],
+        "documents": ["doc"],
+        "metadatas": [{"source": "x"}, {"source": "y"}],
+    }) == (["a"], ["doc"], [{"source": "x"}])