Some tests of the JS API are implemented in QUnit.
host:3000/tests_name
rspec spec/system/js/q_unit_spec.rb
QUNIT_TEST=name rspec spec/system/js/q_unit_spec.rb
Opening directly depends on browser settings for timezone and locale. Running via rspec sets timezone and locale.
name.js
file in public/assets/tests/qunit/name.html.erb
file app/views/tests/app/views/tests/show.html.erb
form_*
tests default to app/views/tests/form.html.erb
name.html.erb