adding tests
This PR only contain pageviews_test.go to avoid conflicts, but I haven't been able to find the problem yet by logging in pageviews.go.
How to register an account on GitLab. To prevent spam, new accounts are locked until approved by an admin or the approver bot. You can also file an unlock request to expedite access.
Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
This PR only contain pageviews_test.go to avoid conflicts, but I haven't been able to find the problem yet by logging in pageviews.go.