Use tox to run test in travis

This way we can harmonize tox and travis configuration

Author: Oliver Sauder

Diff for: .gitignore

@@ -30,7 +30,7 @@ pip-delete-this-directory.txt
 .idea/
 
 # PyTest cache
-.cache/
+.pytest_cache/
 
 # Tox
 .tox/

Diff for: .travis.yml

@@ -1,50 +1,42 @@
----
 language: python
 sudo: false
 cache: pip
 # Favor explicit over implicit and use an explicit build matrix.
 matrix:
   include:
     - python: 2.7
-      env: DJANGO=">=1.11,<2.0" DRF=">=3.6.3,<3.7"
+      env: TOXENV=py27-django111-drf36
     - python: 2.7
-      env: DJANGO=">=1.11,<2.0" DRF=">=3.7.0,<3.8"
+      env: TOXENV=py27-django111-drf37
 
     - python: 3.4
-      env: DJANGO=">=1.11,<2.0" DRF=">=3.6.3,<3.7"
+      env: TOXENV=py34-django111-drf36
     - python: 3.4
-      env: DJANGO=">=1.11,<2.0" DRF=">=3.7.0,<3.8"
+      env: TOXENV=py34-django111-drf37
     - python: 3.4
-      env: DJANGO=">=2.0,<2.1" DRF=">=3.7.0,<3.8"
+      env: TOXENV=py34-django20-drf37
 
     - python: 3.5
-      env: DJANGO=">=1.11,<2.0" DRF=">=3.6.3,<3.7"
+      env: TOXENV=py35-django111-drf36
     - python: 3.5
-      env: DJANGO=">=1.11,<2.0" DRF=">=3.7.0,<3.8"
+      env: TOXENV=py35-django111-drf37
     - python: 3.5
-      env: DJANGO=">=2.0,<2.1" DRF=">=3.7.0,<3.8"
+      env: TOXENV=py35-django20-drf37
 
     - python: 3.6
-      env: DJANGO=">=1.11,<2.0" DRF=">=3.6.3,<3.7"
+      env: TOXENV=py36-django111-drf36
     - python: 3.6
-      env: DJANGO=">=1.11,<2.0" DRF=">=3.7.0,<3.8"
+      env: TOXENV=py36-django111-drf37
     - python: 3.6
-      env: DJANGO=">=2.0,<2.1" DRF=">=3.7.0,<3.8"
-before_install:
-  # Force an upgrade of py & pytest to avoid VersionConflict
-  - pip install --upgrade py
-  # Faker requires a newer pytest
-  - pip install "pytest>3.3"
-  - pip install codecov flake8 isort
+      env: TOXENV=py36-django20-drf37
+    - python: 3.6
+      env: TOXENV=flake8
+    - python: 3.6
+      env: TOXENV=isort
 install:
-  - pip install Django${DJANGO} djangorestframework${DRF}
-  - python setup.py install
+  - pip install tox
 script:
-  - flake8
-  - isort --check-only --verbose --recursive --diff rest_framework_json_api
-  # example has extra dependencies that are installed in a dev environment
-  # but are not installed in CI. Explicitly set those packages.
-  - isort --check-only --verbose --recursive --diff --thirdparty pytest --thirdparty polymorphic --thirdparty pytest_factoryboy --thirdparty packaging  example
-  - coverage run setup.py -v test
+  - tox
 after_success:
-  - codecov
+  - pip install codecov
+  - codecov -e TOXENV

Diff for: setup.cfg

@@ -7,7 +7,11 @@ universal = 1
 [flake8]
 ignore = F405
 max-line-length = 100
-exclude = docs/conf.py,build,migrations
+exclude =
+    docs/conf.py,
+    build,
+    migrations,
+    .tox,
 
 [isort]
 indent = 4

Diff for: tox.ini

@@ -1,10 +1,12 @@
 [tox]
 envlist =
     py{27,34,35,36}-django111-drf{36,37},
+    py{34,35,36}-django20-drf{37},
 
 [testenv]
 deps =
     django111: Django>=1.11,<1.12
+    django20: Django>=2.0,<2.1
     drf36: djangorestframework>=3.6.3,<3.7
     drf37: djangorestframework>=3.7.0,<3.8
 
@@ -15,11 +17,16 @@ setenv =
 commands =
     python setup.py test {posargs}
 
+[testenv:flake8]
+deps = flake8
+commands = flake8
+skip_install = true
+
 [testenv:isort]
 deps =
     isort
 commands =
     isort --check-only --verbose --recursive --diff rest_framework_json_api
     # example has extra dependencies that are installed in a dev environment
     # but are not installed in CI. Explicitly set those packages.
-    isort --check-only --verbose --recursive --diff --thirdparty pytest --thirdparty polymorphic --thirdparty pytest_factoryboy example
+    isort --check-only --verbose --recursive --diff --thirdparty pytest --thirdparty polymorphic --thirdparty pytest_factoryboy --thirdparty packaging example