Model tests in Ruby on Rails - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a basic model test class in Rails.

Ruby on Rails

class UserTest < ActiveSupport::[1]
end

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

ATestCase

BControllerTest

CIntegrationTest

DSystemTest

Attempts:

3 left

💡 Hint

Common Mistakes

Using ControllerTest instead of TestCase

Using IntegrationTest for model tests

The base class for model tests in Rails is ActiveSupport::TestCase.

2fill in blank

medium

Complete the code to test that a User model is invalid without an email.

Ruby on Rails

test "should not save user without email" do
  user = User.new(email: nil)
  assert_not user.[1]?
end

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Ainvalid

Bsave

Cpersisted

Dvalid

Attempts:

3 left

💡 Hint

Common Mistakes

Using save? which is not a method

Using invalid? which is not a method

The valid? method checks if the model passes validations.

3fill in blank

hard

Fix the error in the test to check uniqueness validation of username.

Ruby on Rails

test "username should be unique" do
  user1 = User.create(username: "testuser")
  user2 = User.new(username: "testuser")
  assert_not user2.[1]?
end

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Avalid

Bsave

Ccreate

Dpersisted

Attempts:

3 left

💡 Hint

Common Mistakes

Using save? which is not a method

Using create which saves the record

To check if the new user is valid (fails uniqueness), use valid?.

4fill in blank

hard

Fill both blanks to test that a User model responds to name and email attributes.

Ruby on Rails

test "user responds to attributes" do
  user = User.new
  assert_respond_to user, :[1]
  assert_respond_to user, :[2]
end

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Aname

Bemail

Cpassword

Dusername

Attempts:

3 left

💡 Hint

Common Mistakes

Using password or username instead of name or email

The test checks if the user object has name and email methods.

5fill in blank

hard

Fill all three blanks to test that a User model is invalid without name, email, and password.

Ruby on Rails

test "user is invalid without required fields" do
  user = User.new(name: nil, email: nil, password: nil)
  assert_not user.[1]?
  assert_includes user.errors[:[2]], "can't be blank"
  assert_includes user.errors[:[3]], "can't be blank"
end

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

Avalid

Bname

Cemail

Dpassword

Attempts:

3 left

💡 Hint

Common Mistakes

Using save? instead of valid?

Checking errors on wrong attributes

The test asserts the user is invalid and checks error messages for name and email fields.