If there are failed tests, debug them with these steps:

  1. Go to definitions of failed tests. Assume that testMoveAttachedTabBeforeHiddenTab failed.
  2. Set test functions' property .runnable to true, like: testMoveAttachedTabBeforeHiddenTab.runnable = true; then only those tests are ran and others are ignored.
  3. Debug them until all tests become green.
  4. Revert lines setting .runnable and run all tests again.
  5. Back to the step 1 if there is any failed test.