TestEdgeCases Class — langchain Architecture

Architecture documentation for the TestEdgeCases class in test_responses.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  e1727813_b2d3_5cfa_ec44_ea32e986ec96["TestEdgeCases"]
  835890fb_aded_a0bb_7186_c7c7cbe4a4b0["EmptyDocModel"]
  e1727813_b2d3_5cfa_ec44_ea32e986ec96 -->|extends| 835890fb_aded_a0bb_7186_c7c7cbe4a4b0
  4ec8d71c_3a26_be00_a621_f5533ddc4441["test_responses.py"]
  e1727813_b2d3_5cfa_ec44_ea32e986ec96 -->|defined in| 4ec8d71c_3a26_be00_a621_f5533ddc4441
  dc92d79a_e0ab_4ae6_7061_e46c8c5eb8f4["test_single_schema()"]
  e1727813_b2d3_5cfa_ec44_ea32e986ec96 -->|method| dc92d79a_e0ab_4ae6_7061_e46c8c5eb8f4
  e18d76fd_8dab_570f_a547_1d8d963d4f5f["test_empty_docstring_model()"]
  e1727813_b2d3_5cfa_ec44_ea32e986ec96 -->|method| e18d76fd_8dab_570f_a547_1d8d963d4f5f

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/test_responses.py lines 270–282

class TestEdgeCases:
    """Test edge cases and error conditions."""

    def test_single_schema(self) -> None:
        """Test ToolStrategy with a single schema creates one schema spec."""
        strategy = ToolStrategy(EmptyDocModel)
        assert len(strategy.schema_specs) == 1

    def test_empty_docstring_model(self) -> None:
        """Test that models without explicit docstrings have empty tool descriptions."""
        binding = OutputToolBinding.from_schema_spec(_SchemaSpec(EmptyDocModel))
        assert binding.tool.name == "EmptyDocModel"
        assert not binding.tool.description