BadSchemaError - cannot define an empty value in test - either give it a value or explicitly set it to None

HI @michaelboulton

I am not sure why this exception is raised and there is proper exception message to traceback. Please improve relevant exception message block. I have defined my tavern test valid only.

external function

def generate_request_headers():
    """
    Generate the request headers based upon the parse_env_file_to_dict() ouput when headers.env file is passed
    :return: header_info as dict
    """
    # Set environment variables
    # os.environ['ENV_TYPE'] = 'api_gateway'

    auth_header = None
    if os.environ['ENV_TYPE'] == 'api_gateway':
        header_dict = parse_env_file_to_dict()  # this method will input as .env and form the headers info as dict
        auth_header = {key.strip(): value.strip() for key,value in header_dict.items()}
    else:
        auth_header = {"Accept": "application/json"}

    return Box(auth_header)

Tavern Test:

test_name: Verify healthz API request and 200 status code

marks:
    - smoke
    - regression
    - health

stages:
  - name: Check AI_Get_Similar_Nodes API Request
    request:
        url: "{tavern.env_vars.HOST_IP:s}{apiInfo.health_check:s}"
        method: GET
        headers:
          $ext:
            function: notifications.test_utilities.helpers:generate_request_headers
    response:
      status_code: 200
      json:
        status: ok from notification  #API output is {"status":"ok from notification"}
---

run.sh

#!/usr/bin/env bash

host_ip_fetched=$1
env_type_fetched=$2

export HOST_IP=${host_ip_fetched:-"http://localhost:5003"}
export ENV_TYPE=${env_type_fetched:-"local"}

pytest -vv tests/positive

======================================================================= test session starts ========================================================================
platform win32 -- Python 3.8.3, pytest-6.1.1, py-1.9.0, pluggy-0.13.1 -- c:\venkatesh\gitlab_push\hps-api-tavern-tests\venv\scripts\python.exe
cachedir: .pytest_cache
metadata: {'Python': '3.8.3', 'Platform': 'Windows-10-10.0.16299-SP0', 'Packages': {'pytest': '6.1.1', 'py': '1.9.0', 'pluggy': '0.13.1'}, 'Plugins': {'html': '2.1.1
', 'metadata': '1.10.0', 'tavern': '1.6.0'}, 'JAVA_HOME': 'C:\\Program Files\\java\\jdk-12.0.2'}
rootdir: C:\Venkatesh\gitlab_push\hps-api-tavern-tests\notifications, configfile: pytest.ini
plugins: html-2.1.1, metadata-1.10.0, tavern-1.6.0
collected 0 items / 1 error                                                                                                                                         

============================================================================== ERRORS ==============================================================================
______________________________________________ ERROR collecting tests/positive/test_Notification_Healthz.tavern.yaml _______________________________________________
..\venv\lib\site-packages\tavern\testutils\pytesthook\file.py:274: in collect
    all_tests = list(
..\venv\lib\site-packages\yaml\__init__.py:130: in load_all
    yield loader.get_data()
..\venv\lib\site-packages\yaml\constructor.py:45: in get_data
    return self.construct_document(self.get_node())
..\venv\lib\site-packages\yaml\composer.py:27: in get_node
    return self.compose_document()
..\venv\lib\site-packages\tavern\util\loader.py:38: in compose_document
    node = self.compose_node(None, None)
..\venv\lib\site-packages\yaml\composer.py:64: in compose_node
    if self.check_event(AliasEvent):
..\venv\lib\site-packages\yaml\parser.py:98: in check_event
    self.current_event = self.state()
..\venv\lib\site-packages\yaml\parser.py:211: in parse_document_content
    event = self.process_empty_scalar(self.peek_token().start_mark)
..\venv\lib\site-packages\tavern\util\loader.py:423: in error_on_empty_scalar
    raise exceptions.BadSchemaError(error)
E   tavern.util.exceptions.BadSchemaError: Error at C:\Venkatesh\gitlab_push\hps-api-tavern-tests\notifications\tests\positive\test_Notification_Healthz.tavern.yaml:
19 - column 3 - cannot define an empty value in test - either give it a value or explicitly set it to None
===================================================================== short test summary info ======================================================================
ERROR tests/positive/test_Notification_Healthz.tavern.yaml - tavern.util.exceptions.BadSchemaError: Error at C:\Venkatesh\gitlab_push\hps-api-tavern-tests\notific...

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
========================================================================= 1 error in 1.44s =========================================================================

[kvenkat88]

@benhowes , Finally found the rootcause of the exception is Pycharm IDE is not loading or parsing the yaml file perfectly. I have saved the same set of code with NotePad++, then code is executing perfectly.

Thanks you so much for your reply. Keep doing your good work.

[michaelboulton]

Glad to hear its solved, I’ve had a few issues with indentation in yaml files where its not obvious why something isn’t working before.