RSpec feature tests for simple CRUDing of a resource

groups_spec.rb

require 'rails_helper'

RSpec.feature "Groups", type: :feature do
  let(:user)        { FactoryBot.create(:user) }
  let(:admin)       { FactoryBot.create(:user, :with_admin) }
  let(:group)       { FactoryBot.create(:group) }
  let(:groups)      { FactoryBot.create_list(:group, 2) }
  let(:new_group)   { FactoryBot.build(:group) }

  scenario 'require authentication' do
    visit groups_path

    expect(page).to have_content('You need to sign in or sign up before continuing')
  end

  scenario 'require admin access' do
    sign_in user
    visit groups_path

    expect(current_path).to eq(root_path)
    expect(page).to have_content('Only admins can access this page')
  end

  scenario 'can be viewed' do
    groups
    sign_in admin
    visit groups_path

    groups.each do |group|
      expect(page).to have_content(group.name)
    end
  end

  scenario 'can be created' do
    sign_in admin

    expect {
      visit new_group_path
      fill_in 'Name', with: new_group.name
      click_button 'Create Group'
    }.to change(Group, :count).by(+1)

    expect(page).to have_content('Group was successfully created')
  end

  scenario 'can be read' do
    group

    sign_in admin
    visit groups_path
    first(:link, "Show").click

    expect(current_path).to eq(group_path(group))
    expect(page).to have_content(group.name)
  end

  scenario 'can be updated' do
    group

    old_name = group.name
    new_name = 'new_name'

    sign_in admin

    expect {
      visit edit_group_path(group)
      fill_in 'Name', with: new_name
      click_button 'Update Group'
    }.to change { group.reload.name }.from(old_name).to(new_name)

    expect(page).to have_content('Group updated successfully')
    expect(current_path).to eq(group_path(group))
  end

  scenario 'can be deleted' do
    group

    sign_in admin

    expect {
      visit groups_path
      first(:link, "Destroy").click
    }.to change(Group, :count).by(-1)

    expect(current_path).to eq(groups_path)
    expect(page).to have_content('Group destroyed successfully')
    expect(page).to_not have_content(group.name)
  end
end