gem 'ammeter'

require 'ammeter/init'

require 'spec_helper'

# Generators are not automatically loaded by Rails
require 'generators/rspec/model/model_generator'

describe Rspec::Generators::ModelGenerator, :type => :generator do
  # Tell the generator where to put its output (what it thinks of as Rails.root)
  destination File.expand_path("../../../../../tmp", __FILE__)
  before do
    prepare_destination
  end

  # using mocks to ensure proper methods are called
  # invoke_all - will call all the tasks in the generator
  it 'should run all tasks in the generator' do
    gen = generator %w(posts)
    gen.should_receive :create_model_spec
    gen.should_receive :create_fixture_file
    capture(:stdout) { gen.invoke_all }
  end

  # invoke_task - will call just the named task in the generator
  it 'should run a specific tasks in the generator' do
    gen = generator %w(posts)
    gen.should_receive     :create_model_spec
    gen.should_not_receive :create_fixture_file
    capture(:stdout) { gen.invoke_task :create_model_spec }
  end

  # custom matchers make it easy to verify what the generator creates
  describe 'the generated files' do
    before do
      run_generator %w(posts)
    end
    describe 'the spec' do
      # file - gives you the absolute path where the generator will create the file
      subject { file('spec/models/posts_spec.rb') }

      # is_expected_to contain - verifies the file's contents
      it { is_expected_to contain /require 'spec_helper'/ }
      it { is_expected_to contain /describe Posts/ }
    end
    describe 'the migration' do
      subject { migration_file('db/migrate/create_posts.rb') }

      # is_expected_to be_a_migration - verifies the file exists with a migration timestamp as part of the filename
      it { is_expected_to be_a_migration }
      it { is_expected_to contain /create_table/ }
    end
  end
end