In rspec (1.2.9), what is the correct way to specify that an object will receive multiple calls to a method with a different argument each time?
I ask because of this confusing result:
describe Object do
it "passes, as expected" do
foo = mock('foo')
foo.should_receive(:bar).once.ordered.with(1)
foo.should_receive(:bar).once.ordered.with(2)
foo.bar(1)
foo.bar(2)
end
it "fails, as expected" do
foo = mock('foo')
foo.should_receive(:bar).once.ordered.with(1) # => Mock "foo" expected :bar with (1) once, but received it twice
foo.should_receive(:bar).once.ordered.with(2)
foo.bar(1)
foo.bar(1)
foo.bar(2)
end
it "fails, as expected" do
foo = mock('foo')
foo.should_receive(:bar).once.ordered.with(1)
foo.should_receive(:bar).once.ordered.with(2)
foo.bar(2) # => Mock "foo" received :bar out of order
foo.bar(1)
end
it "fails, as expected, but with an unexpected message" do
foo = mock('foo')
foo.should_receive(:bar).once.ordered.with(1)
foo.should_receive(:bar).once.ordered.with(2)
foo.bar(1)
foo.bar(999) # => Mock "foo" received :bar with unexpected arguments
# => expected: (1)
# => got (999)
end
end
I expected the last failure message to be "expected: (2)", not "expected (1)". Have I used rspec incorrectly?
Best Answer
Similar to this question. The recommended solution is to call
as_null_object
to avoid the confusion of messages. So:The output is not the same as your second case (i.e. "expected 2 but got 999"), but it does show that the expectation was not met.