8.4Deprecation Testing

def test_deprecated_endpoint_returns_warning(api):
    """Deprecated endpoints should include a deprecation warning header."""
    r = api.get("/v1/legacy-endpoint")
    assert r.status_code == 200  # Still works
    # Should include deprecation warning
    assert "Deprecation" in r.headers or "Sunset" in r.headers or \
        "X-Deprecated" in r.headers

def test_deprecated_endpoint_still_functional(api):
    """Deprecated endpoints must still work until officially removed."""
    r = api.get("/v1/legacy-endpoint")
    assert r.status_code == 200
    assert len(r.json()["items"]) > 0  # Still returns data