Integration tests in Ruby on Rails - Mini Project: Build & Apply

Integration Tests in Rails

📖 Scenario: You are building a simple blog application in Rails. You want to make sure that users can visit the homepage and see the list of posts correctly.

🎯 Goal: Create an integration test that visits the homepage and checks that the page shows the title of a post.

📋 What You'll Learn

Create a post record with a specific title

Set up a test to visit the homepage path

Check that the page contains the post title text

Use Rails integration test syntax with get and assert_select

💡 Why This Matters

🌍 Real World

Integration tests help ensure that different parts of a web app work together correctly, like visiting pages and seeing expected content.

💼 Career

Rails developers use integration tests to catch bugs early and maintain app quality, which is important for professional web development.

1

Create a post record

Create a post record with the title 'My First Post' using Post.create! and assign it to a variable called post.

Ruby on Rails

# Create a post record with title 'My First Post'
# Your code here

Need a hint?

Use Post.create!(title: 'My First Post') and assign it to post.

2

Set up the integration test class

Create a class called PostsFlowTest that inherits from ActionDispatch::IntegrationTest.

Ruby on Rails

post = Post.create!(title: 'My First Post')

# Define integration test class PostsFlowTest inheriting from ActionDispatch::IntegrationTest
# Your code here

Need a hint?

Use class PostsFlowTest < ActionDispatch::IntegrationTest to start the test class.

3

Write a test method to visit homepage

Inside the PostsFlowTest class, write a test method called test_visiting_homepage that uses get root_path to visit the homepage.

Ruby on Rails

post = Post.create!(title: 'My First Post')

class PostsFlowTest < ActionDispatch::IntegrationTest
  # Write test method test_visiting_homepage
  # Your code here
end

Need a hint?

Define def test_visiting_homepage and call get root_path inside it.

4

Assert the post title appears on the page

Inside the test_visiting_homepage method, add an assert_select that checks for an h1 element containing the text 'My First Post'.

Ruby on Rails

post = Post.create!(title: 'My First Post')

class PostsFlowTest < ActionDispatch::IntegrationTest
  def test_visiting_homepage
    get root_path
    # Add assert_select to check for h1 with 'My First Post'
    # Your code here
  end
end

Need a hint?

Use assert_select 'h1', 'My First Post' to check the page content.