/usr/share/doc/ruby-rspec-mocks/features/basics/null_object_doubles.feature is in ruby-rspec-mocks 3.4.0c3e0m1s1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | Feature: Null object doubles
[Test 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.
Scenario: `as_null_object` allows arbitrarily deep message chains and returns itself
Given a file named "as_null_object_spec.rb" with:
"""ruby
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
Scenario: Individual methods can still be allowed or expected
Given a file named "as_null_object_spec.rb" with:
"""ruby
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
|