Check has_attribute instead of actual

[alexbeeken]

check if attribute key exists instead of checking if attribute value exists, addresses case of attribute value being nil

What is the current behavior?

If the key is present in the attributes hash but the value of it is nil it will show a test failure message of this:

which is clearly incorrect as the key is present in the array

What is the new behavior?

It will now show the correct error message of a nil value when expecting a different value

more helpful error message

Checklist

Please make sure the following requirements are complete:

• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been reviewed and added / updated if needed (for bug fixes / features)
• [ ] All automated checks pass (CI/CD)

[stas]

Thank you @alexbeeken