test_grep_with_large_file_skipping() — langchain Function Reference

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_file_search.py lines 387–405

    def test_grep_with_large_file_skipping(self, tmp_path: Path) -> None:
        """Test that grep skips files larger than max_file_size_mb."""
        # Create a file larger than 1MB
        large_content = "x" * (2 * 1024 * 1024)  # 2MB
        (tmp_path / "large.txt").write_text(large_content, encoding="utf-8")
        (tmp_path / "small.txt").write_text("x", encoding="utf-8")

        middleware = FilesystemFileSearchMiddleware(
            root_path=str(tmp_path),
            use_ripgrep=False,
            max_file_size_mb=1,  # 1MB limit
        )

        assert isinstance(middleware.grep_search, StructuredTool)
        assert middleware.grep_search.func is not None
        result = middleware.grep_search.func(pattern="x")

        # Large file should be skipped
        assert "/small.txt" in result