organizations: add exception test for describe_organization endpoint

tests/test_organizations/test_organizations_boto3.py

@@ -32,6 +32,17 @@ def test_describe_organization():
  validate_organization(response)
 
 
+@mock_organizations
+def test_describe_organization_exception():
+ client = boto3.client('organizations', region_name='us-east-1')
+ with assert_raises(ClientError) as e:
+ response = client.describe_organization()
+ ex = e.exception
+ ex.operation_name.should.equal('DescribeOrganization')
+ ex.response['Error']['Code'].should.equal('400')
+ ex.response['Error']['Message'].should.contain('AWSOrganizationsNotInUseException')
+
+
 # Organizational Units
 
 @mock_organizations