#31378: django.test.utils compare_xml assumes string, errors on bytes
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Reporter: Joe Germuska | Owner: nobody
Type: Uncategorized | Status: new
Component: Testing framework | Version: master
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Description changed by Joe Germuska:
Old description:
> In writing a test case, I found that passing the test client's
> `response.content` object into `TestCase.assertXMLEqual()` resulted in
> this error: `a bytes-like object is required, not 'str'`
>
> In tracing the code, this originates from
> [https://github.com/django/django/blob/ba4389a36b5fb1afce0cddb4e28233138b6612b7/django/test/utils.py#L586-L587
> django.test.utils.compare_xml], where string literals `\\n` and `\n` are
> passed to `replace()` even though the types of `want` and `got`
> (particularly `got`) may be `bytes` and not `str`.
>
> The workaround is to decode the response content
> (`response.content.decode('utf-8')`) and to pass the assertion comparison
> ("want") also as a string, but if this method is going to be used in the
> testing framework, it seems that it should tolerate directly passing in
> `response.content`, even if that's a `bytes`.
New description:
In writing a test case, I found that passing the test client's
`response.content` object into `TestCase.assertXMLEqual()` resulted in
this error: `a bytes-like object is required, not 'str'`
In tracing the code, this originates from
[https://github.com/django/django/blob/ba4389a36b5fb1afce0cddb4e28233138b6612b7/django/test/utils.py#L586-L587
django.test.utils.compare_xml], where string literals `\\n` and `\n` are
passed to `replace()` even though the types of `want` and `got`
(particularly `got`) may be `bytes` and not `str`.
The workaround is to decode the response content before calling
`assertXMLEqual` (`response.content.decode('utf-8')`) and to pass the
assertion comparison ("want") also as a string, but if this method is
going to be used in the testing framework, it seems that it should
tolerate directly passing in `response.content`, even if that's a `bytes`.
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Ticket URL: <https://code.djangoproject.com/ticket/31378#comment:1>
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