travis-tox-cov setup, first try

.travis.yml

@@ -1,14 +1,18 @@
 language: python
 dist: trusty
-python:
-  - "2.7"
-  - "3.6"
+
 install:
-  - pip install -e .
-  - pip install pytest-cov codecov
-  - pip freeze
+  - pip install tox codecov
+
+matrix:
+ include:
+  - python: 2.7
+    env: TOXENV=py27
+  - python: 3.7
+    env: TOXENV=py37
+
 script:
-  - py.test --cov-config=.coveragerc --cov=dirhash tests/
+  - tox -e TOXENV
+
 after_success:
-  - coverage report
-  - codecov
+  - codecov -e TOXENV

tests/test_cli.py

@@ -1,6 +1,7 @@
 from __future__ import print_function, division
 
 import os
+import sys
 import shlex
 import subprocess
 
@@ -9,14 +10,22 @@
 import pytest
 
 
+console_script = os.path.join(
+    os.path.dirname(sys.executable),
+    'dirhash'
+)
+
+
 def dirhash_run(argstring, add_env=None):
+    assert os.path.isfile(console_script)
+    assert os.access(console_script, os.X_OK)
     if add_env:
         env = os.environ.copy()
         env.update(add_env)
     else:
         env = None
     process = subprocess.Popen(
-        ['dirhash'] + shlex.split(argstring),
+        [console_script] + shlex.split(argstring),
         stdout=subprocess.PIPE,
         stderr=subprocess.PIPE,
         env=env

tox.ini

@@ -0,0 +1,9 @@
+[tox]
+envlist = py27,py37
+
+[testenv]
+deps =
+    pytest-cov
+commands =
+    py.test --cov-report=xml --cov-config=.coveragerc --cov=dirhash tests/
+    coverage report