Replace deprecated assertResponse() with assertSession()->statusCodeEquals()

Thanks for the patch. Can I suggest that, instead of trying to fix a whole set of test files in one patch, you focus on just one type of deprecation and replacement. This will make testing and reviewing easier, and we can commit smaller patches.

Also with just one deprecation per issue, can you add a link to the Change Record and/or documentation page in the issue summary, so that we can see what is being fixed. Your patch altered 18 test files and the four tests which failed are

Drupal\Tests\scheduler\Functional\SchedulerRequiredTest
Drupal\Tests\scheduler\Functional\SchedulerPermissionsTest
Drupal\Tests\scheduler\Functional\SchedulerPastDatesTest
Drupal\Tests\scheduler\Functional\SchedulerApiTest

Good start though. Splitting up the issue will help to make progress on this.

Jonathan

Another reason for splitting out into separate issues for each problem is that you avoid repeating other people's work. In your patch you have included changes for assertText() but this has already been started in #3050086: Replace deprecated function assertText() with pageTextContains()

After checking all the changes made in patch #3 a large proportion are now covered by other issues. After removing all those, the majority of what was left were replacing assertResponse() with assertSession()->statusCodeEquals(). Hence this issue can now be specifically for that fix.

Done.

The second parameter is not required in statusCodeEqual() and should be removed.
Can also use $assert() when #3102092: Replace deprecated function assertNoText() with pageTextNotContains() is committed.

Patch for checking.

Done.