Currently system tests (through Fixtures) will invoke many HTTP requests via curl to track visits. Instead of doing this in EVERY system test, we should create two new system tests that use HTTP (one for the normal HTTP tracker API, and another for bulk tracking). Then change all fixtures to use LocalTracker. This will hopefully speed up tests and make it easier to maintain the old system tests.

TODO:

• create HttpTrackingTest. We should look through all existing fixtures and see how the HTTP API is tested and make sure those tests that require being tested through an HTTP request are replicated in the new test.
• create BulkTrackingTest. Do the same as above just for bulk tracking requests only.
• switch to LocalTracker in all Fixtures. Should probably be enough to change Fixture::getTracker
• make sure there are no major drops in code coverage

Notes:

• LocalTracker was written a long time ago as a hack to improve test speed. Sometime in the future when the tracker is refactored, we should switch to doing something like:

$tracker = new \Piwik\Tracker();
$tracker->track(...);

CC-ing @tsteur since you've been thinking about refactoring tests for a while now.