self.assertEqual(len(self.operations_called), 0)
        self.assertTrue(
            json_matches(json.loads(output[0]), self.expected_policy_document))

    # Use case: Expected trust policy already exists
    # Expected results: No operation is performed by client
    # The command should print that the trust policy statement already exists
    @mock.patch('awscli.customizations.emrcontainers.'
                'iam.IAM.get_assume_role_policy')
    @mock.patch('awscli.customizations.emrcontainers.'
                'eks.EKS.get_oidc_issuer_id')
    @mock.patch('awscli.customizations.emrcontainers.'
                'eks.EKS.get_account_id')
    def test_trust_policy_exists(self, get_account_id_patch,
                                 get_oidc_issuer_id_patch,
                                 get_assume_role_policy_patch):
        self.policy_document = self.expected_policy_document

        get_assume_role_policy_patch.return_value = self.policy_document
        get_oidc_issuer_id_patch.return_value = self.oidc_provider
        get_account_id_patch.return_value = self.account_id

        output = self.run_cmd(self.command, expected_rc=0)
        self.assertEqual(len(self.operations_called), 0)
        self.assertTrue(TRUST_POLICY_STATEMENT_ALREADY_EXISTS %
                        self.role_name in output[0])


if __name__ == "__main__":
    unittest.main()
        self.assertEqual(
            '[default]\n'
            's3 =\n'
            '    signature_version = NEWVALUE\n',
            self.get_config_file_contents())

    def test_get_nested_attribute(self):
        self.set_config_file_contents(
            '[default]\n'
            's3 =\n'
            '    signature_version = v4\n'
        )
        p = aws('configure get default.s3.signature_version',
                 env_vars=self.env_vars)
        self.assertEqual(p.stdout.strip(), 'v4')
        p = aws('configure get default.bad.doesnotexist',
                env_vars=self.env_vars)
        self.assertEqual(p.rc, 1)
        self.assertEqual(p.stdout, '')


class TestConfigureHasArgTable(unittest.TestCase):
    def test_configure_command_has_arg_table(self):
        m = mock.Mock()
        command = configure.ConfigureCommand(m)
        self.assertEqual(command.arg_table, {})


if __name__ == '__main__':
    unittest.main()