Karthikeyan Singaravelan added the comment:
See also https://bugs.python.org/issue25690 .
https://github.com/nivbend/mock-open has support for seek.
As stated in the other issue supporting all operations of a filesystem might
add more complexity.
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components: +Library (Lib)
nosy:
New submission from Niko :
Using 'mock_open' to unit test a code that uses the 'seek()' function for the
file object does not work. This would be a great addition for mock_open
functionality as this use case happens occasionally.
Test file contains:
def test_one(self):
with patch("builtin
