I've recently discovered compound expectations in RSpec 3, which I really
like, but I noticed a difference in output if you use them within a custom
matcher. For example:
RSpec::Matchers.define :be_acceptable do
match do |actual|
expect(actual).to be_even.and be > 10
end
end
describe "Composing matchers" do
it "works in an expectation" do
expect(1).to be_even.and be > 10
end
it "works inside another matcher" do
expect(1).to be_acceptable
end
end
Both expectations work, but the second loses the detailed failure
information:
Failure/Error: expect(1).to be_even.and be > 10 expected `1.even?` to
return true, got false ...and: expected: > 10 got: 1
Failure/Error: expect(1).to be_acceptable expected 1 to be acceptable
Is there a way to encapsulate a set of other matchers inside another
matcher, while retaining the full failure messages?
Thanks,
Kerry
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