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 collaboratorTest Doubles
Test double is a generic term for any object that stands in for a real object during a test
(think "stunt double"). You create one using the double
method. Doubles are "strict" by
default -- any message you have not allowed or expected will trigger an error -- but you can
switch a double to being "loose". When creating a double, you can allow messages (and set
their return values) by passing a hash.
Once you have a test double, you can allow or expect messages on it.
We recommend you use verifying doubles whenever possible.
- Scenarios
-
- Doubles are strict by default
-
- Given
-
a file named "double_spec.rb" with:
RSpec.describe "A test double" do it "raises errors when messages not allowed or expected are received" do dbl = double("Some Collaborator") dbl.foo end end
- When
-
I run
rspec double_spec.rb
- Then
-
it should fail with:
#<Double "Some Collaborator"> received unexpected message :foo with (no args)
- A hash can be used to define allowed messages and return values
-
- Given
-
a file named "double_spec.rb" with:
RSpec.describe "A test double" do it "returns canned responses from the methods named in the provided hash" do dbl = double("Some Collaborator", :foo => 3, :bar => 4) expect(dbl.foo).to eq(3) expect(dbl.bar).to eq(4) end end
- When
-
I run
rspec double_spec.rb
- Then
- the examples should all pass
Last published almost 6 years ago by myronmarston.