move testing stuff to tox

.travis.yml

@@ -9,12 +9,13 @@ python:
 matrix:
   include:
     - python: '3.8'
-      script: coverage run --source nested_diff setup.py test
+      install:
+      - pip install --quiet --upgrade coveralls tox
+      script: tox -e coverage
       after_success:
       - coveralls
 install:
-- pip install --quiet --upgrade coveralls pytest
-script: python setup.py test
-sudo: false
+- pip install --quiet --upgrade tox
+script: tox -e py
 notifications:
   email: false

setup.py

@@ -1,20 +1,11 @@
 import setuptools
-import sys
 
 import nested_diff
 
 
 with open('README.md') as f:
     long_description = f.read()
 
-flake8_modules = [
-    'flake8-commas',
-    'flake8_quotes',
-]
-
-if sys.version_info >= (3, 6):
-    flake8_modules.append('flake8-bugbear')
-
 setuptools.setup(
     name='nested_diff',
     version=nested_diff.__version__,
@@ -43,9 +34,6 @@
     author_email='mixas.sr@gmail.com',
     license='Apache License 2.0',
     packages=['nested_diff'],
-    test_suite='tests',
-    setup_requires=['pytest-runner'],
-    tests_require=['pytest', 'pytest-flake8', 'pyyaml'] + flake8_modules,
     entry_points={
         'console_scripts': [
             'nested_diff=nested_diff.diff_tool:cli',

tox.ini

@@ -0,0 +1,26 @@
+[tox]
+envlist = py
+usedevelop = true
+
+[testenv]
+commands =
+    pytest --flake8
+
+deps =
+    flake8-commas
+    flake8-bugbear ; python_version >= '3.6'
+    flake8_quotes
+    pytest
+    pytest-flake8
+    pyyaml==5.2 ; python_version < '3.5'
+    pyyaml      ; python_version >= '3.5'
+
+setenv = PYTHONHASHSEED = 1
+
+[testenv:coverage]
+deps =
+    {[testenv]deps}
+    coverage
+
+commands =
+    coverage run --source nested_diff -m pytest