Merge pull request #3893 from jirikuncar/3892-macos

travis: run tests on macOS

.travis.yml

@@ -44,6 +44,21 @@ jobs:
  python: '3.7'
  sudo: required
  dist: xenial
+ - &test-macos
+ language: generic
+ os: osx
+ osx_image: xcode9.4
+ sudo: required
+ install:
+ - python -m pip install --pre tox
+ env: TOXENV=py27
+ - <<: *test-macos
+ env: TOXENV=py37
+ before_install:
+ - brew update
+ - brew upgrade python
+ - brew unlink python
+ - brew link python
 
  - stage: deploy
  python: '3.6'

changelog/3888.bugfix.rst

@@ -0,0 +1 @@
+Fix macOS specific code using ``capturemanager`` plugin in doctests.

src/_pytest/doctest.py

@@ -203,7 +203,8 @@ def _disable_output_capturing_for_darwin(self):
  return
  capman = self.config.pluginmanager.getplugin("capturemanager")
  if capman:
- out, err = capman.suspend_global_capture(in_=True)
+ capman.suspend_global_capture(in_=True)
+ out, err = capman.read_global_capture()
  sys.stdout.write(out)
  sys.stderr.write(err)
 

testing/python/fixture.py

@@ -1584,6 +1584,7 @@ def test_package_fixture_complex(self, testdir):
  values = []
  """
  )
+ testdir.syspathinsert(testdir.tmpdir.dirname)
  package = testdir.mkdir("package")
  package.join("__init__.py").write("")
  package.join("conftest.py").write(