Coverage for tests (#22)

Fixes #21

.coveragerc

@@ -0,0 +1,6 @@
+[run]
+branch = true
+source = sendfile
+omit =
+    */_version.py
+    */tests.py

.gitignore

@@ -10,3 +10,5 @@
 /build
 .Python
 .tox
+/examples/protected_downloads/htmlcov
+/examples/protected_downloads/.coverage

.travis.yml

@@ -11,9 +11,14 @@ python:
   - pypy2.7-6.0
   - pypy3.5-6.0
 
-install: travis_retry pip install -q tox
 
-script: tox -e py  # run tox for the current version of Python
+install: pip install tox-travis codecov
+
+script: tox
+
+after_success:
+    - cd examples/protected_downloads
+    - codecov
 
 matrix:
   include:

tox.ini

@@ -1,20 +1,44 @@
 [tox]
 envlist =
+    clean
     py{py,27,py3,35,36,37}-django111
     py{py3,35,36,37,38}-django{21,22}
     flake8
+    coverage
 
 [testenv]
 usedevelop=True
 deps =
     django111: Django>=1.11,<1.12
     django21: Django>=2.1,<2.2
     django22: Django>=2.2,<2.3
+    coverage
 changedir = examples/protected_downloads
 commands =
     python --version
-    python manage.py test sendfile {posargs}
+    coverage run --rcfile=../../.coveragerc -a manage.py test sendfile {posargs}
 
+[travis]
+python =
+    pypy: clean,pypy,coverage
+    pypy3: clean,pypy3,coverage
+    2.7: clean,py27,coverage
+    3.5: clean,py35,coverage
+    3.6: clean,py36,coverage
+    3.7: clean,py37,coverage
+    3.8: clean,py38,coverage
+
+[testenv:clean]
+basepython = python3
+deps = coverage
+commands = coverage erase
+
+[testenv:coverage]
+basepython = python3
+deps = coverage
+commands =
+    coverage report
+    coverage html
 
 [testenv:flake8]
 basepython=python