# Writing Tests for Plugins

You'll need to make several subclasses to get this working in the current test infrastructure. But first, we start with some imports. These are pretty much required for all plugin tests:

from trac.tests.functional import (FunctionalTestSuite,
FunctionalTestCaseSetup,
FunctionalTwillTestCaseSetup, tc)
from trac.tests.functional import testenv


Now subclass :class:~trac.tests.functional.testenv.FunctionalTestEnvironment. This allows you to override methods that you need to set up your repo instead of the default Subversion one:

class GitFunctionalTestEnvironment(testenv.FunctionalTestEnvironment):
repotype = 'git'

def create_repo(self):
os.mkdir(self.repodir)
self.call_in_repo(["git", "init"])
self.call_in_repo(["git", "config", "user.name", "Test User"])
self.call_in_repo(["git", "config", "user.email", "test@example.com"])

def get_enabled_components(self):
return ['tracext.git.*']

def get_repourl(self):
return self.repodir + '/.git'
repourl = property(get_repourl)


Now you need a bit of glue that sets up a test suite specifically for your plugin's repo type. Any testcases within this test suite will use the same environment. No other changes are generally necessary on the test suite:

class GitFunctionalTestSuite(FunctionalTestSuite):
env_class = GitFunctionalTestEnvironment


Your test cases can call functions on either the :ref:tester <functional-tester> or :ref:twill commands <using-twill> to do their job. Here's one that just verifies we were able to sync the repo without issue:

class EmptyRepoTestCase(FunctionalTwillTestCaseSetup):
def runTest(self):
self._tester.go_to_timeline()
tc.notfind('Unsupported version control system')


Lastly, there's some boilerplate needed for the end of your test file, so it can be run from the command line:

def suite():
# Here you need to create an instance of your subclass
suite = GitFunctionalTestSuite()