tox: Update pytest to 2.9.0.

New Features

- New pytest.mark.skip mark, which unconditionally skips marked tests.
- --doctest-glob may now be passed multiple times in the command-line.
- New -rp and -rP reporting options give the summary and full output of passing
  tests, respectively.
- pytest.mark.xfail now has a strict option which makes XPASS tests to fail the
  test suite, defaulting to False. There’s also a xfail_strict ini option that
  can be used to configure it project-wise.
- Parser.addini now supports options of type bool.
- New ALLOW_BYTES doctest option strips b prefixes from byte strings in doctest
  output (similar to ALLOW_UNICODE).
- give a hint on KeyboardInterrupt to use the –fulltrace option to show the
  errors
- catch IndexError exceptions when getting exception source location. This
  fixes pytest internal error for dynamically generated code (fixtures and
  tests) where source lines are fake by intention

Changes

- Important: py.code has been merged into the pytest repository as
  pytest._code. This decision was made because py.code had very few uses
  outside pytest and the fact that it was in a different repository made it
  difficult to fix bugs on its code in a timely manner. The team hopes with
  this to be able to better refactor out and improve that code. This change
  shouldn’t affect users, but it is useful to let users aware if they encounter
  any strange behavior.

  Keep in mind that the code for pytest._code is private and experimental, so
  you definitely should not import it explicitly!

  Please note that the original py.code is still available in pylib.

- pytest_enter_pdb now optionally receives the pytest config object.

- Removed code and documentation for Python 2.5 or lower versions, including
  removal of the obsolete _pytest.assertion.oldinterpret module.

- Comparisons now always show up in full when CI or BUILD_NUMBER is found in
  the environment, even when -vv isn’t used.

- --lf and --ff now support long names: --last-failed and --failed-first
  respectively.

- Added expected exceptions to pytest.raises fail message

- Collection only displays progress (“collecting X items”) when in a terminal.
  This avoids cluttering the output when using --color=yes to obtain colors in
  CI integrations systems

Bug Fixes

- The -s and -c options should now work under xdist; Config.fromdictargs now
  represents its input much more faithfully.
- support Python 3.5’s @ operator in assertion rewriting.
- Fix formatting utf-8 explanation messages.
- Fix traceback style docs to describe all of the available options
  (auto/long/short/line/native/no), with auto being the default since v2.6.
- junit record_xml_property doesn’t allow multiple records with same name.

tox.ini

@@ -26,7 +26,7 @@ deps =
     parse==1.6.6
     parse-type==0.3.4
     py==1.4.31
-    pytest==2.8.7
+    pytest==2.9.0
     pytest-bdd==2.16.0
     pytest-catchlog==1.2.2
     pytest-cov==2.2.1