Let and before hooks in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a lazy variable using let.

Ruby

let(:user) { [1] }

Drag options to blanks, or click blank then click option'

Ait

BUser.new

Cdescribe

Dbefore(:each)

Attempts:

3 left

💡 Hint

Common Mistakes

Using before(:each) inside let block.

Trying to call describe or it inside let.

The let block defines a lazy variable. Here, User.new creates a new user object when user is called.

2fill in blank

medium

Complete the code to run setup code before each test.

Ruby

before(:each) do
  [1]
end

Drag options to blanks, or click blank then click option'

A@user = User.new

Blet(:user)

Cdescribe 'user'

Dit 'creates user'

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to call let(:user) inside before.

Writing describe or it inside before.

The before(:each) block runs before every test. Assigning @user = User.new sets up a user instance for tests.

3fill in blank

hard

Fix the error in the before hook to properly initialize @count.

Ruby

before(:each) do
  @count = [1]
end

Drag options to blanks, or click blank then click option'

Acount + 1

Blet(:count)

Ccount = 0

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using count + 1 without defining count.

Trying to call let(:count) inside before.

Inside before, you assign @count = 0 to initialize the variable before each test.

4fill in blank

hard

Fill both blanks to create a let variable and use it in a before hook.

Ruby

let(:number) { [1] }
before(:each) do
  @result = number [2] 5
end

Drag options to blanks, or click blank then click option'

A10

B+

C*

D20

Attempts:

3 left

💡 Hint

Common Mistakes

Using multiplication instead of addition.

Using a string instead of a number in let.

The let defines number as 10. The before hook adds 5 to number and stores in @result.

5fill in blank

hard

Fill all three blanks to define a let variable, a before hook, and a test using them.

Ruby

let(:text) { [1] }
before(:each) do
  @shouted = text.[2]
end
it 'shouts the text' do
  expect(@shouted).to eq([3])
end

Drag options to blanks, or click blank then click option'

A"hello"

Bupcase

C"HELLO"

Ddowncase

Attempts:

3 left

💡 Hint

Common Mistakes

Using downcase instead of upcase.

Mismatching expected string case in the test.

The let defines text as "hello". The before hook calls upcase on it. The test expects "HELLO".