Module: Spec::Example::Subject::ExampleMethods

Included in:
ExampleMethods
Defined in:
lib/spec/example/subject.rb

Instance Method Summary collapse

Instance Method Details

#should(matcher = nil) ⇒ Object

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.

Examples

describe Person do
  it { should be_eligible_to_vote }
end



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# File 'lib/spec/example/subject.rb', line 65

def should(matcher=nil)
  if matcher
    subject.should(matcher)
  else
    subject.should
  end
end

#should_not(matcher = nil) ⇒ Object

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

Examples

describe Person do
  it { should_not be_eligible_to_vote }
end



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# File 'lib/spec/example/subject.rb', line 81

def should_not(matcher=nil)
  if matcher
    subject.should_not(matcher)
  else
    subject.should_not
  end
end

#subject ⇒ Object

Returns the subject defined in ExampleGroupMethods#subject. 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.

Examples

# explicit subject defined by the subject method
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



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# File 'lib/spec/example/subject.rb', line 51

def subject
  @subject ||= instance_eval(&self.class.subject)
end