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Fundamentals of Testing Using Rails

Expectations and lit

Explore how to apply RSpec's let and let! methods to manage test data efficiently while writing Ruby on Rails tests. Understand implicit and predicate matchers to improve test readability and maintainability. This lesson equips you with techniques to write clearer, more idiomatic RSpec tests, enhancing your Test-Driven Development workflow.

We'll cover the following...

In addition to examining code for potential refactoring, it’s a good idea to look at the duplication tests.

Ruby
require "rails_helper"
RSpec.describe Project do
  it "considers a project with no tasks to be done" do
    project = Project.new
    expect(project.done?).to be_truthy
  end
  it "knows that a project with an incomplete task is not done" do
    project = Project.new
    task = Task.new
    project.tasks << task
    expect(project.done?).to be_falsy
  end
end

In this case, in the spec/models/project_spec.rb file, we have a single line of common setup, project = Project.new ...