Adds code coverage

Author: austinpray

.coveragerc

@@ -0,0 +1,3 @@
+[run]
+branch = True
+source = slacktools

.travis.yml

@@ -2,12 +2,13 @@ language: python
 cache: pip
 matrix:
   include:
-    - python: 3.4
-    - python: 3.5
-    - python: 3.6
     - python: 3.7
       dist: xenial
       sudo: true
+      script: pytest && codecov
+    - python: 3.4
+    - python: 3.5
+    - python: 3.6
     - python: 3.8-dev
       dist: xenial
       sudo: true

README.rst

@@ -3,7 +3,7 @@ python-slacktools
 
 A toolbelt for working with the various `Slack APIs`_ in python.
 
-|Build Status| |Documentation Status| |PyPI - Version| |PyPI - Python Version|
+|Documentation Status| |Build Status| |Code Coverage| |PyPI - Version| |PyPI - Python Version|
 
 .. |Build Status| image:: https://travis-ci.com/austinpray/python-slacktools.svg?branch=master
     :target: https://travis-ci.com/austinpray/python-slacktools
@@ -13,6 +13,8 @@ A toolbelt for working with the various `Slack APIs`_ in python.
     :target: https://pypi.org/project/slacktools/
 .. |PyPI - Python Version| image:: https://img.shields.io/pypi/pyversions/Django.svg
     :target: https://pypi.org/project/slacktools/
+.. |Code Coverage| image:: https://codecov.io/gh/austinpray/python-slacktools/branch/master/graph/badge.svg
+    :target: https://codecov.io/gh/austinpray/python-slacktools
 
 Features
 --------

pytest.ini

@@ -1,3 +1,3 @@
 [pytest]
-addopts = --doctest-modules
+addopts = --doctest-modules --cov
 testpaths = slacktools

requirements-dev.txt

@@ -1,4 +1,7 @@
+codecov
 pytest
+pytest-cov
+
 sphinx
 sphinx-autobuild
 sphinx_rtd_theme