Rails Testing and Debugging

Question 1

spec directory

Answer 1

rails file structure to store tests

typically has a separate models and features sub-directory

Question 2

Why separate spec/features and spec/models?

Answer 2

Allows you to take advantage of RSpec’s built in assumptions (all tests in features are feature test, etc.)

Without this, you need to declare a type for each test: “RSpec.describe ‘this is a feature test’, type: :feature do”

Question 3

Capybara method that allows us to use CSS Selectors to select elements and then write expectations just for that area of the page

Answer 3

within

e.g.,
within(‘#artist-13’) do
expect(page).to have_content(‘content about this artist’)
end

Question 4

Spec File naming convention

Answer 4

test files MUST end with _spec.rb

convention is to name spec files in model folder after the model its testing.

no convention for feature testing

Question 5

Spec File naming convention

Answer 5

test files MUST end with _spec.rb

convention is to name spec files in model folder after the model its testing.

no convention for feature testing. You could match your views, or match the headline of each user story

Question 6

Spec File naming convention

Answer 6

test files MUST end with _spec.rb

convention is to name spec files in model folder after the model its testing.

no convention for feature testing. You could match your views, or match the headline of each user story

Question 7

before :each

Answer 7

block that will run before every test (every it block), used to create setup for many test and DRY up test files (similar to setup method in Minitest)

Question 8

method to check that some content appears anywhere on a page

Answer 8

have_content

Question 9

method to check if there is a button with a particular label

Answer 9

have_button

Question 10

method to check if there is a specific link

Answer 10

have_link

Question 11

method to check if there is a particular css selector (often used to verify images)

Answer 11

have_ccs

Question 12

method to check if there is a particular css selector (often used to verify images)

Answer 12

have_ccs

Question 13

method to check if there is a link or button with a matching label

Answer 13

click_on(‘label’)

or
click_button
click_link

Question 14

Capybara method to return a single element that matches a css selector, a

Answer 14

find

song_14 = page.find(‘#song-14’)
expect(song_14).to have_content(‘Raspberry Beret’)

Question 15

Capybara method to return an array of all elements that match a css selector

Answer 15

all

all_songs = page.all(‘.song’)
expect(all_songs[2]).to have_content(‘Purple Rain’)

Question 16

How to test for sorted elements

Answer 16

Use all method, ccs selectors, and array methods to verify a specific order.

within ‘#best-users’ do
expect(page.all(‘.user’)[0]).to have_content(“megan”)
expect(page.all(‘.user’)[1]).to have_content(“brian”)
expect(page.all(‘.user’)[2]).to have_content(“sal”)
end