feat(nlp-service): FastAPI app with /parse and /health endpoints

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

nlp-service/test_main.py

@@ -0,0 +1,52 @@
+import pytest
+from fastapi.testclient import TestClient
+
+
+@pytest.fixture(scope="session")
+def client():
+    from main import app
+    with TestClient(app) as c:
+        yield c
+
+
+def test_health(client):
+    response = client.get("/health")
+    assert response.status_code == 200
+    assert response.json() == {"status": "ok"}
+
+
+def test_parse_returns_200_with_all_fields(client):
+    response = client.post("/parse", json={"query": "Briefe vor 1920", "lang": "de"})
+    assert response.status_code == 200
+    data = response.json()
+    assert "personNames" in data
+    assert "personRole" in data
+    assert data["personRole"] in ("sender", "receiver", "any")
+    assert "dateFrom" in data
+    assert "dateTo" in data
+    assert "keywords" in data
+    assert "rawQuery" in data
+    assert data["rawQuery"] == "Briefe vor 1920"
+    assert data["dateTo"] == "1920-12-31"
+
+
+def test_parse_unknown_lang_returns_422(client):
+    response = client.post("/parse", json={"query": "test", "lang": "fr"})
+    assert response.status_code == 422
+
+
+def test_parse_missing_query_returns_422(client):
+    response = client.post("/parse", json={"lang": "de"})
+    assert response.status_code == 422
+
+
+def test_parse_all_languages(client):
+    cases = [
+        ("de", "Briefe vor 1920"),
+        ("en", "letters before 1920"),
+        ("es", "cartas antes de 1920"),
+    ]
+    for lang, query in cases:
+        response = client.post("/parse", json={"query": query, "lang": lang})
+        assert response.status_code == 200, f"Failed for lang={lang}"
+        assert response.json()["dateTo"] == "1920-12-31", f"Wrong dateTo for lang={lang}"