Forg/test/controllers/users_controller_test.rb

require "test_helper"

class UsersControllerTest < ActionDispatch::IntegrationTest
  test "should get new" do
    get new_user_url
    assert_response :success
  end

  test "should create user" do
    assert_changes("User.count", +1) do
      post(users_url, params: { user: user_params })
    end
    assert_redirected_to login_path
  end

  test "should email user for confirmation" do
    assert_emails(+1) do
      post(users_url, params: { user: user_params })
    end
  end

  test "should alert to invalid user" do
    assert_no_changes("User.count") do
      post(users_url, params: { user: { username: "new_user" } })
    end
    assert_response :unprocessable_entity
  end

  private

    def user_params
      {
        username: "new_user",
        password: "password",
        email: "new_user@ex.com",
        first_name: "new",
        last_name: "user",
      }
    end
end