only run coverage for relevant test (#818)

* fix test troubles

* another try

* testing travis build?

* trying pytestmark

.travis.yml

@@ -24,14 +24,15 @@ before_cache:
   - rm -f $HOME/.pre-commit/pre-commit.log
 
 install:
-  - pip install coveralls pytest-cov
+  - pip install -U coveralls pytest-cov
   - pip install -U wheel
   - pip install -U -r requirements.txt
   - pip install -U -r requirements-dev.txt
   - if [[ $TRAVIS_PYTHON_VERSION != 'pypy'* ]]; then pip install ujson; fi
 
 script:
-  - pytest -v --cov=telegram
+  - pytest -v -m nocoverage
+  - pytest -v -m "not nocoverage" --cov
 
 after_success:
   - coverage combine

tests/test_meta.py

@@ -17,7 +17,6 @@
 # You should have received a copy of the GNU Lesser Public License
 # along with this program.  If not, see [http://www.gnu.org/licenses/].
 import os
-import subprocess
 import sys
 from platform import python_implementation
 
@@ -26,17 +25,22 @@ import pytest
 
 def call_pre_commit_hook(hook_id):
     __tracebackhide__ = True
-    return os.system(' '.join(['pre-commit', 'run', '--all-files', hook_id]))
+    return os.system(' '.join(['pre-commit', 'run', '--all-files', hook_id]))  # pragma: no cover
 
 
+@pytest.mark.nocoverage
 @pytest.mark.parametrize('hook_id', argvalues=('yapf', 'flake8', 'pylint'))
 @pytest.mark.skipif(not os.getenv('TRAVIS'), reason='Not running in travis.')
 @pytest.mark.skipif(not sys.version_info[:2] == (3, 6) or python_implementation() != 'CPython',
-                   reason='Only running pre-commit-hooks on newest tested python version, '
-                          'as they are slow and consistent across platforms.')
+                    reason='Only running pre-commit-hooks on newest tested python version, '
+                           'as they are slow and consistent across platforms.')
 def test_pre_commit_hook(hook_id):
-    assert call_pre_commit_hook(hook_id) == 0
+    assert call_pre_commit_hook(hook_id) == 0  # pragma: no cover
 
 
+@pytest.mark.nocoverage
+@pytest.mark.skipif(
+    not sys.version_info[:2] in ((3, 6), (2, 7)) or python_implementation() != 'CPython',
+    reason='Only testing build on 2.7 and 3.6')
 def test_build():
-    assert os.system('python setup.py bdist_dumb') == 0
+    assert os.system('python setup.py bdist_dumb') == 0  # pragma: no cover