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

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

Instance Method Summary collapse

Instance Method Details

#__should_for_example_group__ ⇒ Object 



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# File 'lib/vendor/plugins/rspec/lib/spec/example/subject.rb', line 49

alias_method :__should_for_example_group__,     :should

#__should_not_for_example_group__ ⇒ Object 



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# File 'lib/vendor/plugins/rspec/lib/spec/example/subject.rb', line 50

alias_method :__should_not_for_example_group__, :should_not

#should(matcher = nil, message = 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/vendor/plugins/rspec/lib/spec/example/subject.rb', line 90

def should(matcher=nil, message=nil)
  self == subject ? self.__should_for_example_group__(matcher) : subject.should(matcher,message)
end

#should_not(matcher = nil, message = 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/vendor/plugins/rspec/lib/spec/example/subject.rb', line 102

def should_not(matcher=nil, message=nil)
  self == subject ? self.__should_not_for_example_group__(matcher) : subject.should_not(matcher,message)
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/vendor/plugins/rspec/lib/spec/example/subject.rb', line 76

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