Find an easy way to list the slower tests

[octopusinvitro]

At the moment we can do:

bundle exec rake TESTOPTS='-v'

to print how much time each test takes to run. However it would be nice to be able to see, say, the top 20 slowest tests.

I found some ways of doing it, but I don't quite like them:

• Monkey-patching Minitest to create a custom reporter... NOPE. Also, seems like the only way to do this is creating a library out of it, rather than adding some simple code in your test_helper, for example. I tried this and couldn't make it work, but I didn't spend more than one hour on it.
• Installing the minitest-reporters gem, BUT dependencies!
• Changing all our tests from the it syntax to the test_name_of_test syntax so that we can do bundle exec rake TESTOPTS='--verbose' | sort -t = -k 2 -g on the terminal. NOPE.
• output to a file and manipulate its contents in pry, the poor man approach I'm following.

$ bundle exec rake TESTOPTS='-v' > foo
$ pry
> x = File.readlines('./foo')
> z = x.sort_by { |y| y.split('=')[1].to_f }.reverse.map { |y| y.strip }.take(20)

^^^ 😱 😱 😱 😱

I'm sure there should be an easy way to do this.

BTW, the slowest tests are of course the integration tests! (i.e., the web tests). At the moment of writing this I get:

"Federal Constituency Place Page::social block#test_0002_links to facebook share = 0.29 s = .",
"List of Representatives::person item::when person does not have an image#test_0001_shows a picture anyway (empty avatar) = 0.18 s = .",
"List of Representatives::person item#test_0001_links to the person page = 0.17 s = .",
"List of Representatives::person item#test_0004_links to area page = 0.15 s = .",
"List of Representatives::person item#test_0007_displays party name = 0.15 s = .",
"List of Representatives::person list#test_0001_lists all representatives = 0.14 s = .",
"List of Representatives::person item::when person has an image#test_0001_points to the right path = 0.14 s = .",
"Posts Page#test_0002_shows all posts = 0.13 s = .",
"Posts Page#test_0001_shows the title = 0.13 s = .",
"Posts Page::when displaying a post#test_0004_displays post excerpt = 0.12 s = .",
"Posts Page::when displaying a post#test_0003_displays post date = 0.12 s = .",
"List of Representatives::person item#test_0003_shows right area type name = 0.12 s = .",
"List of Representatives::person item::when person has an image#test_0003_has the name as alternative text = 0.12 s = .",
"Posts Page::when displaying a post#test_0001_links to post url = 0.11 s = .",
"List of Representatives::person item#test_0005_displays area name = 0.11 s = .",
"Federal Constituency Place Page::person item#test_0007_links to the person area = 0.10 s = .",
"Posts Page::when displaying a post#test_0002_displays post title = 0.10 s = .",
"Page::Place#test_0008_has all the people for that place = 0.10 s = .",
"List of Representatives::person item::when person has an image#test_0002_has an srcset = 0.10 s = .",
"List of Representatives#test_0001_shows the title = 0.10 s = ."

[mhl]

Timebox to 1 day