About this case
This test case ensures that Tidy handles autonomous custom tags appropriately
for pre-HTML5 documents. Tidy will support them via the custom-tags
option, even though such documents do not support such tags.
In this case, custom-tags is no, and so Tidy should
report unknown tags. We will use force-output to ensure that a
document is generated, and to gather additional warning output.
This is a user-defined tag, and Tidy should provide a warning, but allow it.
This is a user-defined tag, and Tidy should provide a warning, but allow it.
Because custom-tags is no, it's treated like any
other user-defined tag, even though it looks like an autonomous custom tag.
This is an autonomous custom tag, but it's not supported in this test case.
It should be rejected and cause an error.