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TFS 2018 API (4.1 version) – Python : Can’t add an attachment in a result of a run using either 4.1 or 5.1 version

I have managed to send my test results from my automation python script to TFS 2018 by creating a run and adding results to it.

Now, I am trying to upload the xml file I produce with the detailed results of the test execution using the Create Test Result Attachment API call . The version of our API is 4.1 and not 5.1 as far as I know.

This is the method I have written in order to achieve what I want:

def add_result_attachment(result_id, run_id, filename, stream, conf_object):    

    url = conf_object.config_map('TFS')['url'] + "TFS/_apis/test/Runs/" + str(run_id) + "/Results/" + str(result_id) + "/attachments"

    payload = "{n    "attachmentType": "GeneralAttachment",n    "fileName": "" + filename + "",n    "stream": "" + str(stream) + "",n    "comment": "Test"n}"

    # specify version of tfs and its rest api
    query_string = {"api-version": "5.1-preview"}

    headers = {
        'Content-Type': "application/json",
        'Authorization': MYKEY
    }

    requests.packages.urllib3.disable_warnings(InsecureRequestWarning)

    response = requests.request("POST", url, data=payload, headers=headers, params=query_string,  verify=False)

    print(str(response.status_code) + "n" + json.dumps(json.loads(response.text), indent=4) + 'n')

I have checked that the URL gives me the correct ids,so it is valid. filename contains the absolute path to the xml file i produce using my pytest command.

The stream contains the string of the base64 encoded form of this xml file.

When I execute this I get as a response:

Traceback (most recent call last):
  File "C:UsersmarialenasourcereposUI-Testertest_signin.py", line 210, in tearDown
    tfs_api.tfs_api.tfs_process(run_start_time, run_completed_time, class_name, method_name, steps, self.outcome)
  File "C:UsersmarialenasourcereposUI-Testertfs_api.py", line 263, in tfs_process
    tfs_api.send_run_results(run_start_time, run_completed_time, json_test_cases['id'], test_name, outcome)
  File "C:UsersmarialenasourcereposUI-Testertfs_api.py", line 586, in send_run_results
    tfs_api.add_result_attachment(result_id, run_id, filename, stream, conf_object)
  File "C:UsersmarialenasourcereposUI-Testertfs_api.py", line 457, in add_result_attachment
    print(str(response.status_code) + "n" + json.dumps(json.loads(response.text), indent=4) + 'n')
  File "C:UsersmarialenaAppDataLocalProgramsPythonPython37libjson__init__.py", line 348, in loads
    return _default_decoder.decode(s)
  File "C:UsersmarialenaAppDataLocalProgramsPythonPython37libjsondecoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:UsersmarialenaAppDataLocalProgramsPythonPython37libjsondecoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 2 column 1 (char 2)

If I swap 5.1-preview to 4.1-preview for version I get status code 400 and the following response:

{
    "$id": "1",
    "innerException": null,
    "message": "Value cannot be null.rnParameter name: attachmentRequestModel",
    "typeName": "System.ArgumentNullException, mscorlib",
    "typeKey": "ArgumentNullException",
    "errorCode": 0,
    "eventId": 0
}

Is there a way to resolve the issue for the 4.1 version in case it is supported by this call or use somehow the 5.1 even if we don’t have the latest TFS ? I have tried also to send the attachment to the run itself instead of its result but no luck with that as well.

Any help would be appreciated. Thanks!

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Answer

In case someone is still interested, someone has answered my question here.

Basically what needed change was to:

  • use a simpler path on the root of the project => TestsOut.log
  • convert the stream in a different way => stream = str(base64.b64encode(data), 'utf-8')
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