Waiting till DOMContentLoaded event is triggered helps avoid flakes since
puppeteer is very fast and starts doing another task before
everything on the page is loaded. Adding this to log_in function
as almost all tests depend on this which leads to flaky tests if
the other parts of tests just start without even the page being
loaded.
One example this commit helps is for the test `02-site.js`
which is dependent on a function that runs some jquery on the site.
But because of the page not being loaded, we miss jquery and thus
the test fails. `02-site.js` and related code is added in the next
commit.
Co-authored-by: Priyank Patel <priyankp390@gmail.com>
When no credentials are sent to `log_in` function we want to
use the default generated test credentials. This saves us the
work of importing test_credentials everytime we run this function
in a different test which doesn't focus on what credentials are sent
to login.
To take a screenshot on failure where we have our common error
handling code in common.run_test method we need to have access to
the Page instance. Currently, we create a new Page in the test method
we pass into run_test, so we pass in a new Page instance to that method
so the test and the run_test method have access to the same Page. And,
then we take a screenshot on failure. It will be saved as `failure-${num}`
in var/puppeteer directory.
In common.js, we now have a single browser instance for the whole
test. When we update the test-js-with-puppetter to spawn a single
node process, like we do for node tests, we will save time on having
to open an new browser for every test + puppetter start up cost.
We will also add some more helpers here like a method for
filling out a form easily etc.
Dinesh
Anders Kaseorg
Priyank Patel