async def test_embed_empty_text(self, model):
        """Test embedding an empty string returns zero vector."""
        result = await model.embed("")
        assert isinstance(result, list)
        assert len(result) == model.vector_dimensions
        assert all(v == 0.0 for v in result)
Test embedding an empty string returns zero vector.
backend/tests/platform/embedding_models/test_openai_text2vec.py