To add a collaborator to this project you will need to use the Relish gem to add the collaborator via a terminal command. Soon you'll be able to also add collaborators here!
More about adding a collaboratorNull object doubles
Test doubles are strict by default, raising errors when they receive messages that have not
been allowed or expected. You can chain as_null_object
off of double
in order to make
the double "loose". For any message that has not explicitly allowed or expected, the double
will return itself. It acts as a black hole null object, allowing arbitrarily deep method chains.
- Scenarios
-
- `as_null_object` allows arbitrarily deep message chains and returns itself
-
- Given
-
a file named "as_null_object_spec.rb" with:
RSpec.describe "as_null_object" do it "returns itself" do dbl = double("Some Collaborator").as_null_object expect(dbl.foo.bar.bazz).to be(dbl) end end
- When
-
I run
rspec as_null_object_spec.rb
- Then
- the examples should all pass
- Individual methods can still be allowed or expected
-
- Given
-
a file named "as_null_object_spec.rb" with:
RSpec.describe "as_null_object" do it "can allow individual methods" do dbl = double("Some Collaborator", :foo => 3).as_null_object allow(dbl).to receive(:bar).and_return(4) expect(dbl.foo).to eq(3) expect(dbl.bar).to eq(4) end end
- When
-
I run
rspec as_null_object_spec.rb
- Then
- the examples should all pass
Last published almost 3 years ago by Jon Rowe.