Import AITURK IDE 1.0.0-beta.1 from Hermes 63279301; preserve MIT license

tests/tools/test_mcp_empty_error_message.py

@@ -0,0 +1,47 @@
+"""Regression tests for MCP error messages when str(exc) is empty.
+
+Issue #19417: ClosedResourceError (and similar exceptions raised without a
+message argument) produced ``MCP call failed: ClosedResourceError: `` with
+nothing after the colon, making debugging impossible.
+
+Fix: ``_exc_str()`` falls back to ``repr(exc)`` when ``str(exc)`` is empty.
+"""
+
+
+from tools.mcp_tool import _exc_str, _sanitize_error
+
+
+# ---------------------------------------------------------------------------
+# _exc_str unit tests
+# ---------------------------------------------------------------------------
+
+
+class _EmptyMessageError(Exception):
+    """Exception whose __str__ returns empty string (like anyio.ClosedResourceError)."""
+
+    def __str__(self):
+        return ""
+
+
+class _NormalError(Exception):
+    pass
+
+
+def test_exc_str_returns_str_when_nonempty():
+    exc = _NormalError("something broke")
+    assert _exc_str(exc) == "something broke"
+
+
+# ---------------------------------------------------------------------------
+# Integration: error message format in _sanitize_error
+# ---------------------------------------------------------------------------
+
+
+def test_error_message_preserves_normal_exception_text():
+    """Normal exceptions should still show their message text."""
+    exc = _NormalError("connection refused")
+    error_msg = _sanitize_error(
+        f"MCP call failed: {type(exc).__name__}: {_exc_str(exc)}"
+    )
+    assert "connection refused" in error_msg
+    assert "_NormalError" in error_msg