def test_prepare_headers(self):
        """Ensures that headers are prepared correctly."""
        headers = {"Custom-Header": "Value"}
        result = self.base_client._prepare_headers(headers=headers)
        expected_headers = {
            "Content-Type": "application/json",
            "Accept": "application/json",
            "Custom-Header": "Value",
        }
        assert result == expected_headers
Ensures that headers are prepared correctly.
llama-index-integrations/embeddings/llama-index-embeddings-oci-data-science/tests/test_oci_data_science_client.py