Rails 5 Test Prescriptions

Back on Task

What remains of your definition of done? is the distinction between complete and incomplete tasks. Let’s start with that, with a test for Task:

basics/03/spec/models/task_spec.rb

require "rails_helper"

RSpec.describe Task do
  let(:task) { Task.new }

  it "does not have a new task as complete" do
    expect(task).not_to be_complete
  end

  it "allows us to complete a task" do
    task.mark_completed
    expect(task).to be_complete
  end
end

You have two specs here. The first says that a brand-new task is not complete. The second creates a different task object, marks it as complete, and expects that it is then complete.

This test is entirely at the API level and makes no claim about the underlying mechanism ...