What does the error ( mapping values are not allowed here) about yaml schema validation mean?

Question

I am using tavern as a test framework for my python project. The mock server for the test is defined in a yaml file:

test_name: Test phonebook service

stages:
  -name: Make sure we can create new contact
   request:
     url: http://localhost:9301/v2/contact
     method: POST
   response:
     status_code: 200
     body:
      id: 1

When I run the test I get this error:

/Users/joey/.pyenv/versions/3.7.2/lib/python3.7/site-packages/yaml/scanner.py:579: in fetch_value
    self.get_mark())
E   yaml.scanner.ScannerError: mapping values are not allowed here
E     in "/Users/joey/dev/iress/devel/phonebook-service-api/src/api/tavern-tests/test_contact.tavern.yaml", line 5, column 11

The line5 is request: but I don't know what wrong with that. I don't think it is a tavern problem while it looks more like yaml schema validation issue.

Paste it into an on line yaml linter and you will see the same error. If you get rid of the - in front of name, it works. — SteveJ, Aug 26 '19 at 03:45
It doesn't work if I remove `-` in front of name because it expects `stages` to be a list — Joey Yi Zhao, Aug 26 '19 at 03:53
I simply meant that the yaml passes , hoping that would help you narrow down the problem. — SteveJ, Aug 26 '19 at 03:58

score 0 · Answer 1 · answered Aug 26 '19 at 03:54

Finally I make it work by placing a space between - and name.

test_name: Test phonebook service

stages:
 - name: Make sure we can create new contact
   request:
     url: http://localhost:9301/v2/contact
     method: POST
   response:
     status_code: 200
     body:
      id: 1

What does the error ( mapping values are not allowed here) about yaml schema validation mean?

1 Answers1