Module RSpec::Core::Subject::ExampleMethods
In: lib/rspec/core/subject.rb

Methods

Public Instance methods

When should is called with no explicit receiver, the call is delegated to the object returned by subject. Combined with an implicit subject (see subject), this supports very concise expressions.

@example

  describe Person do
    it { should be_eligible_to_vote }
  end

Just like should, should_not delegates to the subject (implicit or explicit) of the example group.

@example

  describe Person do
    it { should_not be_eligible_to_vote }
  end

Returns the subject defined by the example group. The subject block is only executed once per example, the result of which is cached and returned by any subsequent calls to `subject`.

If a class is passed to `describe` and no subject is explicitly declared in the example group, then `subject` will return a new instance of that class.

@note `subject` was contributed by Joe Ferris to support the one-liner

  syntax embraced by shoulda matchers:

      describe Widget do
        it { should validate_presence_of(:name) }
      end

  While the examples below demonstrate how to use `subject`
  explicitly in specs, we think it works best for extensions like
  shoulda, custom matchers, and shared example groups, where it is
  not referenced explicitly in specs.

@example

  # explicit declaration of subject
  describe Person do
    subject { Person.new(:birthdate => 19.years.ago) }
    it "should be eligible to vote" do
      subject.should be_eligible_to_vote
    end
  end

  # implicit subject => { Person.new }
  describe Person do
    it "should be eligible to vote" do
      subject.should be_eligible_to_vote
    end
  end

  describe Person do
    # one liner syntax - should is invoked on subject
    it { should be_eligible_to_vote }
  end

[Validate]