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More about adding a collaboratoras_null_object
Use the as_null_object
method to ignore any messages that aren't explicitly
set as stubs or message expectations.
EXCEPTION: to_ary
will raise a NoMethodError unless explicitly stubbed in
order to support flatten
on an Array containing a double.
- Scenarios
-
- double acting as_null_object
-
- Given
-
a file named "as_null_object_spec.rb" with:
describe "a double with as_null_object called" do let(:null_object) { double('null object').as_null_object } it "responds to any method that is not defined" do null_object.should respond_to(:an_undefined_method) end it "allows explicit stubs" do null_object.stub(:foo) { "bar" } null_object.foo.should eq("bar") end it "allows explicit expectations" do null_object.should_receive(:something) null_object.something end it "supports Array#flatten" do [null_object].flatten.should eq([null_object]) end end
- When
-
I run
rspec as_null_object_spec.rb
- Then
- the examples should all pass
Last published over 7 years ago by .