test: Add comprehensive tests for LiteLLMExceptions module

tests/basic/test_exceptions.py

@@ -0,0 +1,53 @@
+import pytest
+from aider.exceptions import LiteLLMExceptions, ExInfo
+
+def test_litellm_exceptions_load():
+    """Test that LiteLLMExceptions loads without errors"""
+    ex = LiteLLMExceptions()
+    assert len(ex.exceptions) > 0
+
+def test_exceptions_tuple():
+    """Test that exceptions_tuple returns a non-empty tuple"""
+    ex = LiteLLMExceptions()
+    assert isinstance(ex.exceptions_tuple(), tuple)
+    assert len(ex.exceptions_tuple()) > 0
+
+def test_get_ex_info():
+    """Test get_ex_info returns correct ExInfo"""
+    ex = LiteLLMExceptions()
+    
+    # Test with a known exception type
+    from litellm import AuthenticationError
+    auth_error = AuthenticationError()
+    ex_info = ex.get_ex_info(auth_error)
+    assert isinstance(ex_info, ExInfo)
+    assert ex_info.name == "AuthenticationError"
+    assert ex_info.retry is False
+    assert "API key" in ex_info.description
+
+    # Test with unknown exception type
+    class UnknownError(Exception):
+        pass
+    unknown = UnknownError()
+    ex_info = ex.get_ex_info(unknown)
+    assert isinstance(ex_info, ExInfo)
+    assert ex_info.name is None
+    assert ex_info.retry is None
+    assert ex_info.description is None
+
+def test_rate_limit_error():
+    """Test specific handling of RateLimitError"""
+    ex = LiteLLMExceptions()
+    from litellm import RateLimitError
+    rate_error = RateLimitError()
+    ex_info = ex.get_ex_info(rate_error)
+    assert ex_info.retry is True
+    assert "rate limited" in ex_info.description.lower()
+
+def test_context_window_error():
+    """Test specific handling of ContextWindowExceededError"""
+    ex = LiteLLMExceptions()
+    from litellm import ContextWindowExceededError
+    ctx_error = ContextWindowExceededError()
+    ex_info = ex.get_ex_info(ctx_error)
+    assert ex_info.retry is False