being concise with RSpec

rspec_lessons.rb

# the way I was used to doing it
describe Dog do
  it 'respond to name' do
    dog = Dog.new
    dog.should respond_to(:name)
  end
end

# "subject" allows you to instantiate Dog in a cooler way
describe Dog do
  it "responds to name" do
    subject.should respond_to(:name)
  end
end

# I later learned you can drop the entire "subject" off and do a "respond_to" to call the (:method)
describe Dog do
  it "responds to name" do
    should respond_to(:name)
  end
end

# An even simpler way to do it in one line, wihtout doing the "respond to" awkward repitition
describe Dog do
  it 'responds to name' { should respond_to(:name) }
end

# The simplest way to do one line
describe Dog do
  it { should respond_to(:name) }
end

# Same way as above in case you want to test variable assignment, not method functionality
describe Dog do
  it { subject.name.should == "Bowser" }
end