dropping support python <= 2.5, small tidy-ups, expanding test coverage

[psi29a]

fix missing os.SEEK_END, use undocumented version since with tests only work with twisted >= 15
removed unsupported APIs, as they are from the 1.5 time. no need to carry them forward
adding GridFS .put .get coverage

[IlyaSkriblovsky]

Coverage for GridFS, cool!

[coveralls]

Coverage increased (+0.9%) to 86.17% when pulling 4b15dda on psi29a:gridfs_coverage into 80cc4c3 on twisted:master.

[coveralls]

Coverage increased (+0.9%) to 86.17% when pulling 4b15dda on psi29a:gridfs_coverage into 80cc4c3 on twisted:master.

[psi29a]

There should be more coverage than that... I didn't write those tests for nothing. I'll need to investigate more. :/

[IlyaSkriblovsky]

Btw, did you know about --coverage option for trial? I've opened it for myself recently and it helps a lot while writing tests.

[coveralls]

Coverage increased (+0.91%) to 87.75% when pulling ca799ab on psi29a:gridfs_coverage into 702f764 on twisted:master.

[trenton42]

@IlyaSkriblovsky I haven't used trial's --coverage option, is that better than using coverage.py? I usually run:

coverage run --source=txmongo `which trial` tests

The html output it produces is quite nice to quickly look through the code and identify areas that need testing.

[IlyaSkriblovsky]

@trenton42 +1 for my toolset, thanks. Didn't used either before.

[trenton42]

@IlyaSkriblovsky and thank you for all the work you've done on on increasing coverage!

[psi29a]

@IlyaSkriblovsky it is what I use, you can see it in our Makefile

[coveralls]

Coverage increased (+4.38%) to 90.91% when pulling 27f01ea on psi29a:gridfs_coverage into bd50ab9 on twisted:master.

[trenton42]

"which trial" makes me chuckle every time

[psi29a]

91% :)