test_mermaid_bgcolor_hex_not_encoded() — langchain Function Reference

Architecture documentation for the test_mermaid_bgcolor_hex_not_encoded() function in test_graph.py from the langchain codebase.

Function python CoreAbstractions Serialization

Entity Profile

CoreAbstractions→ Serialization→ test_mermaid_bgcolor_hex_not_encoded() — langchain Function Reference

Dependency Diagram

graph TD
  6f262739_170b_ab97_3a28_0cdc0ead71e1["test_mermaid_bgcolor_hex_not_encoded()"]
  972d89eb_abd0_b940_67b4_eff75c775ace["test_graph.py"]
  6f262739_170b_ab97_3a28_0cdc0ead71e1 -->|defined in| 972d89eb_abd0_b940_67b4_eff75c775ace
  style 6f262739_170b_ab97_3a28_0cdc0ead71e1 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/runnables/test_graph.py lines 683–698

def test_mermaid_bgcolor_hex_not_encoded() -> None:
    """Test that hex color codes are not prefixed with '!' and work correctly."""
    mock_response = MagicMock()
    mock_response.status_code = 200
    mock_response.content = b"fake image data"

    with patch("requests.get", return_value=mock_response) as mock_get:
        _render_mermaid_using_api(
            "graph TD;\n    A --> B;",
            background_color="#ffffff",
        )

        assert mock_get.called
        url = mock_get.call_args[0][0]
        # Hex colors should be URL-encoded but not prefixed with '!'
        assert "%23ffffff" in url  # '#' encoded as '%23'