There were two reason there were flakes in login tests. One problem was
that the assert call for checking that the login page url was happening
too early in rare cases. To fix this issue we wait for email input field
element in the login page. The second issue was the sometimes the url was
/login/ instead of /accounts/login/. The time between the redirect were
super close here too (around ~10ms) so I am suprised this didn't occur flake
locally more often.
Server logs that show the redirect:
2020-05-26 18:55:27.065 INFO [zr] 127.0.0.1 GET 200 36ms (db: 5ms/2q) (+start: 14ms) /accounts/login/ (unauth@zulip via ?)
2020-05-26 18:55:27.074 INFO [zr] 127.0.0.1 GET 200 28ms (db: 3ms/2q) (+start: 23ms) /login/ (unauth@zulip via ?)
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.
Before fixing `test-js-with-puppeteer` to to use the right webpack
setup, redirects weren't happening properly. The line this commit
removes did a redirect to the register page. This line is removed
as the redirect will happen automatically as expected with fixing
`test-js-with-puppeteer`.
Priyank Patel
Dinesh