Enhance Tests for cloudtrail.utils with Improved Mocking and Edge Cas…

[imSanko]

Handling:

The current test suite for cloudtrail.utils can be improved with better mocking strategies and additional test cases for edge scenarios. This will increase the robustness and reliability of the codebase.

Issue #9173 , if available:

Description of changes:

GitHub Issue

Title: Enhance Tests for cloudtrail.utils with Improved Mocking and Edge Case Handling

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Description:

The current test suite for cloudtrail.utils can be improved with better mocking strategies and additional test cases for edge scenarios. This will increase the robustness and reliability of the codebase.

Changes Implemented:

1. Replaced manual mocking with the @mock.patch decorator for more explicit and isolated testing.
2. Added new tests to cover edge cases:
   • Handling of empty responses from get_caller_identity.
   • Invalid ARNs passed to get_account_id_from_arn.
   • Missing trails in the response of describe_trails.
3. Verified error handling by testing for expected exceptions (KeyError and ValueError) in scenarios with malformed inputs or empty responses.

Example of Improvements:

• Improved mocking for get_account_id:

  @mock.patch('awscli.customizations.cloudtrail.utils.get_account_id')
  def test_gets_sts_account_id(self, mock_get_account_id):
      mock_get_account_id.return_value = '1234'
      account_id = utils.get_account_id(mock_get_account_id)
      self.assertEqual(account_id, '1234')

• Edge case testing for invalid ARNs:

  def test_gets_account_id_from_arn_with_invalid_arn(self):
      arn = 'foo:bar:baz'
      with self.assertRaises(IndexError):
          utils.get_account_id_from_arn(arn)

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