"""Unit tests for core exceptions."""
import pytest
from aws_mcp_server.core.exceptions import AWSMCPError
class TestAWSMCPError:
"""Test simplified AWSMCPError exception."""
def test_basic_exception(self):
"""Test basic exception creation and inheritance."""
error = AWSMCPError("Test error message")
assert isinstance(error, Exception)
assert str(error) == "Test error message"
def test_exception_with_empty_message(self):
"""Test exception with empty message."""
error = AWSMCPError("")
assert str(error) == ""
def test_exception_inheritance(self):
"""Test exception inheritance from base Exception."""
error = AWSMCPError("Test message")
assert isinstance(error, AWSMCPError)
assert isinstance(error, Exception)
assert isinstance(error, BaseException)
class TestExceptionUsage:
"""Test exception usage patterns."""
def test_exception_chaining(self):
"""Test that exceptions can be chained."""
try:
try:
raise ValueError("Original error")
except ValueError as e:
raise AWSMCPError("Service failed") from e
except AWSMCPError as service_error:
assert service_error.__cause__ is not None
assert isinstance(service_error.__cause__, ValueError)
assert str(service_error.__cause__) == "Original error"
def test_exception_catching(self):
"""Test that AWSMCPError can be caught properly."""
def raise_aws_error():
raise AWSMCPError("AWS operation failed")
with pytest.raises(AWSMCPError):
raise_aws_error()
with pytest.raises(AWSMCPError):
raise_aws_error()
def test_exception_with_detailed_message(self):
"""Test exception with detailed error message."""
detailed_message = "AWS EC2 describe_instances failed: Access denied for profile 'test-profile' in region 'us-east-1'"
error = AWSMCPError(detailed_message)
assert str(error) == detailed_message
