Use tox and enable code coverage with tox.

.coveragerc

@@ -0,0 +1,19 @@
+[run]
+branch = True
+source = z3c.flashmessage
+
+[report]
+precision = 2
+omit = */interfaces.py
+       */interfaces/*
+       */tests.py
+       */tests/*
+
+[html]
+directory = htmlcov
+
+[paths]
+source =
+   src/z3c/flashmessage
+   .tox/*/lib/python*/site-packages/z3c/flashmessage
+   .tox/pypy*/site-packages/z3c/flashmessage

.gitignore

@@ -1,11 +1,16 @@
-bin/
-eggs/
-develop-eggs/
-parts/
-.installed.cfg
+*.egg-info/
 *.py[co]
+.coverage
+.coverage.*
+.eggs/
+.installed.cfg
+.tox/
 __pycache__/
+bin/
 build/
+coverage.xml
+develop-eggs/
 dist/
-*.egg-info/
-.tox/
+eggs/
+htmlcov/
+parts/

setup.py

@@ -1,37 +1,50 @@
 import os.path
 from setuptools import setup, find_packages
 
+
 def read(*path_elements):
-    return "\n\n" + file(os.path.join(*path_elements)).read()
+    return "\n\n" + open(os.path.join(*path_elements), 'rt').read()
 
+TEST_REQUIREMENTS = [
+    'zope.publisher',
+    'zope.component',
+    'zope.security',
+    'zope.app.wsgi[testlayer] >= 4.0.0a4',
+    'Webtest',
+]
 
 setup(
-    name = "z3c.flashmessage",
+    name="z3c.flashmessage",
     version='1.4dev',
-    author = "Jasper Op de Coul, Christian Theune",
-    author_email = "jasper@infrae.com, ct@gocept.com",
-    description = "A package for sending `flash messages` to users.",
+    author="Jasper Op de Coul, Christian Theune",
+    author_email="jasper@infrae.com, ct@gocept.com",
+    description="A package for sending `flash messages` to users.",
     long_description=(
         '.. contents::\n\n' +
         read('src', 'z3c', 'flashmessage', 'README.txt') +
         read('CHANGES.txt')
-        ),
-    url = 'http://pypi.python.org/pypi/z3c.flashmessage/',
-    license = "ZPL 2.1",
-    keywords = "zope3 message zope session",
+    ),
+    url='http://pypi.python.org/pypi/z3c.flashmessage/',
+    license="ZPL 2.1",
+    keywords="zope3 message zope session",
     zip_safe=False,
-    packages = find_packages('src'),
-    include_package_data = True,
-    package_dir = {'':'src'},
-    namespace_packages = ['z3c'],
-    install_requires = ['setuptools',
-                        'ZODB3',
-                        'zope.interface',
-                        'zope.schema',
-                        'zope.session'],
-    extras_require=dict(test=[
-        'zope.publisher',
-        'zope.component',
-        'zope.security',
-        'zope.app.wsgi'])
+    packages=find_packages('src'),
+    include_package_data=True,
+    package_dir={'': 'src'},
+    namespace_packages=['z3c'],
+    install_requires=[
+        'setuptools',
+        'ZODB3',
+        'zope.interface',
+        'zope.schema',
+        'zope.session'
+    ],
+    extras_require=dict(test=TEST_REQUIREMENTS),
+    setup_requires=[
+        'eggtestinfo',  # captures testing metadata in EGG-INFO
+        'zope.testrunner'
+    ],
+    tests_require=TEST_REQUIREMENTS,
+    test_suite='z3c.flashmessage.tests.test_suite',
+    test_loader='zope.testrunner.eggsupport:SkipLayers',
 )

tox.ini

@@ -0,0 +1,35 @@
+[tox]
+envlist = coverage-clean, py27, py33, py34, py35, coverage-report
+
+[testenv]
+commands =
+    coverage run setup.py ftest
+setenv =
+  COVERAGE_FILE=.coverage.{envname}
+deps =
+    ; zope.app.wsgi[testlayer] >= 4.0.0a5.dev has to be included
+    ; {toxinidir}/zope.app.wsgi-4.0.0a5.dev0.tar.gz
+    {toxinidir}/zope.app.publication-4.0.0a1.dev0.tar.gz
+    coverage
+    six
+    zope.testrunner
+    ; ZEO pin to get compatibility for Python 3.3
+    ZEO <5.0
+
+[testenv:coverage-clean]
+deps = coverage
+setenv =
+  COVERAGE_FILE=.coverage
+skip_install = true
+commands = coverage erase
+
+[testenv:coverage-report]
+deps = coverage
+setenv =
+  COVERAGE_FILE=.coverage
+skip_install = true
+commands =
+    coverage combine
+    coverage report
+    coverage html
+    coverage xml