Added support for coverage and tox

.coveragerc

@@ -0,0 +1,3 @@
+[run]
+source = apistar_mail
+omit = test*

README.md

@@ -83,4 +83,18 @@ A Message can contain a body and/or HTML:
 ```
 msg.body = 'message body'
 msg.html = '<b>Hello apistar_mail!</b>'
-```
+```
+
+## Testing
+
+To run the test suite with coverage first install the package in editable mode with it's testing requirements:
+
+`pip install -e ".[testing]"`
+
+To run the project's tests
+
+`pytest --cov`
+
+To run tests against multiple python interpreters use:
+
+`tox`

setup.py

@@ -10,13 +10,10 @@ requirements = [
     'apistar',
 ]
 
-setup_requirements = [
-    'pytest-runner',
-]
-
 test_requirements = [
     'pytest',
-    'coverage',
+    'pytest-cov',
+    'tox'
 ]
 
 setup(
@@ -38,11 +35,10 @@ setup(
         'Intended Audience :: Developers',
         'License :: OSI Approved :: MIT License',
         'Natural Language :: English',
-        'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
     ],
-    test_suite='tests',
-    tests_require=test_requirements,
-    setup_requires=setup_requirements,
+    extras_require={
+        'testing': test_requirements,
+    }
 )

tests/test_apistar_mail.py

@@ -1,10 +1,10 @@
-from apistar_mail.mail import Message, Mailer, force_text
+from apistar_mail.mail import Message, Mail, force_text
 from apistar_mail.exc import MailUnicodeDecodeError
 
 import pytest
 
 settings = {
-    'EMAIL': {
+    'MAIL': {
         'MAIL_SERVER': 'smtp.example.com',
         'MAIL_USERNAME': 'fake@example.com',
         'MAIL_PASSWORD': 'secret',

tox.ini

@@ -0,0 +1,5 @@
+[tox]
+envlist = py35,py36
+[testenv]
+deps=pytest
+commands=pytest