Ruby testing

1 setup.md

1, add to gem file

gem "rspec-rails", :group => [:test, :development]
group :test do
  gem "factory_girl_rails"
  gem "capybara"
  gem "guard-rspec"
end

2, run these command

bundle install
rails g rspec:install
mkdir spec/support spec/models spec/routing spec/features
guard init rspec
sudo gem install rb-fsevent

rspec.rb

blah

stubs_mocks.rb

# stubs replace the method, and return a result.
# mocks check if the method get called.
# object stub change a hash to a object instance with methods.

# stubs
test "show_author_summary should set status to zombie summary" do 
  @tweet.zombie.stubs(:zombie_summary)
  @tweet.show_author_summary
  assert_equal @tweet.zombie.zombie_summary, @tweet.status, 'tweet status does not contain zombie summary'
end

# mocks
test "status_image calls the ZwitPic get_status_image api" do 
  ZwitPic.expects(:get_status_image).with(@tweet.id)
    .returns(['Scary Zombie', 'http://zwitpic.com/scary_zombie.png'])
  @tweet.status_image
end

# object stub
def status_image
  image = ZwitPic.get_status_image(self.id)
  "<img src='#{image.url}' alt='#{image.name}' />".html_safe
end

unit_test.rb

# basic test
class ConditionalTest < Test::Unit::TestCase
  def test_one_greater_than_zero
    assert 1 < 0, "One is not greater than zero"
  end
end

# assert
# assert_not_nil
# assert_match
# assert_equal
# assert_raise
class ZombifierTest < Test::Unit::TestCase
  def test_brains_in_zombify_raises_error
    z = Zombifier.new('BRAINS')
    assert_raise(RuntimeError){ z.zombify }
  end
end

# assert_kind_of
class ZombifierTest < Test::Unit::TestCase
  def test_zombify_returns_a_string
    z = Zombifier.new('I like knees')
    assert_kind_of String, z.zombify
  end
end

# assert_response_to