Run test_official in a seperate travis job (#1491)

.travis.yml

@@ -7,6 +7,9 @@ matrix:
     - python: 3.7
       dist: xenial
       sudo: true
+    - python: 3.7
+      dist: xenial
+      env: TEST_OFFICIAL=true
     - python: pypy2.7-5.10.0
       dist: xenial
     - python: pypy3.5-5.10.1
@@ -14,6 +17,7 @@ matrix:
   allow_failures:
     - python: pypy2.7-5.10.0
     - python: pypy3.5-5.10.1
+    - env: TEST_OFFICIAL=true
 
 dist: trusty
 sudo: false
@@ -40,8 +44,9 @@ install:
   - if [[ $TRAVIS_PYTHON_VERSION != 'pypy'* ]]; then pip install ujson; fi
 
 script:
-  - pytest -v -m nocoverage
-  - pytest -v -m "not nocoverage" --cov
+  - if [[ $TEST_OFFICIAL != 'true' ]]; then pytest -v -m nocoverage; fi
+  - if [[ $TEST_OFFICIAL != 'true' ]]; then pytest -v -m "not nocoverage" --cov; fi
+  - if [[ $TEST_OFFICIAL == 'true' ]]; then pytest -v tests/test_official.py; fi
 
 after_success:
   - coverage combine

tests/test_official.py

@@ -16,9 +16,8 @@
 #
 # 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 inspect
-import sys
-from platform import python_implementation
 
 import certifi
 import pytest
@@ -149,7 +148,7 @@ for thing in soup.select('h4 > a.anchor'):
 
 
 @pytest.mark.parametrize(('method', 'data'), argvalues=argvalues, ids=names)
-@pytest.mark.skipif(not sys.version_info >= (3, 7) or python_implementation() != 'CPython',
-                    reason='follow_wrapped (inspect.signature) is not supported on this platform')
+@pytest.mark.skipif(os.getenv('TEST_OFFICIAL') != 'true',
+                    reason='test_official is not enabled')
 def test_official(method, data):
     method(data)