Adding test to get 100% coverage in urllib.error.

Thanks Daniel. I will commit it.

New changeset 33f02ccb5301 by Senthil Kumaran in branch '3.2':
#17471 - Improve urllib2 test coverage. Patch contributed by Daniel Wozniak
http://hg.python.org/cpython/rev/33f02ccb5301

New changeset 4e59a7fc69c6 by Senthil Kumaran in branch '3.3':
#17471 - merge from 3.2
http://hg.python.org/cpython/rev/4e59a7fc69c6

New changeset 21d23fda469f by Senthil Kumaran in branch 'default':
#17471 - merge from 3.3
http://hg.python.org/cpython/rev/21d23fda469f

Daniel - I could not really get the need for this check.

+    >>> msg = str(err)
+    >>> str(err.code) in msg and err.msg in msg

The other one was really useful and probably covered the reasonstr.

Thanks for the patch.

Senthil,

The two lines you excluded from that patch give us coverage on HTTPError.__str__ , I added to the existing interface test so as not to re-produce the code there. I still think it could be added since it will give us that last line of coverage and verifies the exception's code and msg are in the string representation of HTTPError.

root@d1:/root/hg/cpython# ./python ../coveragepy report --show-missingName               Stmts   Miss  Cover   Missing
------------------------------------------------
Lib/urllib/error      32      1    97%   56

Daniel, 

Agree to your point. Sorry that i did not run the coverage before.

I would prefer to do the check this way for readability of the test code and get to 100% coverage.

        >>> expected_errmsg = 'HTTP Error %s: %s' %(err.code, err.msg)
        >>> assert str(err) == expected_errmsg

Any thoughts?

Sure, your way is much easier to tell what is getting tested. The only thing I was trying to avoid is including the static text "HTTP Error" so the test will not break if that static text changes. That said, I really doubt the text would change for any reason. I think we should go with your way.

Avoiding the static test is actually a good idea for Exception "messages", as there is no guarantee for those to be consistent across revs. But this one is slightly different in HTTPError str represent and we better be consistent in this. I dont see changing too. Thanks for bringing this to 100% coverage.

New changeset ae9aea1b3546 by Senthil Kumaran in branch '3.2':
#17471 - Increasing the urllib.error test coverage. Bringing it to 100%. Based on patch contributed by Daniel Wozniak
http://hg.python.org/cpython/rev/ae9aea1b3546

New changeset 8e9cf147fbca by Senthil Kumaran in branch '3.3':
#17471 - merge from 3.2
http://hg.python.org/cpython/rev/8e9cf147fbca

New changeset 64183c2aa05e by Senthil Kumaran in branch 'default':
#17471: merge from 3.3
http://hg.python.org/cpython/rev/64183c2aa05e