[5.7] Improve assertJsonValidationErrors error message, make it fail when no keys given #27495
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Currently, when the
assertJsonValidationErrors
assertion fails, it prints the following unhelpful error message:This PR makes it output the validation errors that are present. This makes it easier to figure out what is going on.
If the response has no json validation errors, it will show this instead:
This PR also makes the assertion fail if you don't give the assertions any keys to expect. Currently if you pass in an empty array, the method won't make any assertion and just keep going.