We need to update a MockFileSystem instance used in unit_test (defined in port/test.py) so that we can write unittests for reftests.
I am working on this in another patch: https://bugs.webkit.org/show_bug.cgi?id=55457
Let me leave this entry as is because I may separate the patch into smaller patches.
I'd be surprised if you needed to add much to MockFileSystem for this, but I guess we'll see ...
Sorry for confusing. I didn't mean that we need to modify MockFileSystem class itself.
I meant that we need to modify unit_test_filesystem() function defined in port/test.py, which instantiate MockFileSystem.
(In reply to comment #2)
> I'd be surprised if you needed to add much to MockFileSystem for this, but I guess we'll see ...