How to verify that "puts" has been called with a certain message?
I'm trying to make this test fail :)
it "should display the question" do
@ui.should开发者_如何转开发_receive(:puts).with("What's your name?").once
@ui.ask_question("What's your name?")
end
At the moment it passes even if I don't call puts in my function.
Basically, @ui should call .puts on an object that probably defaults to $stdout. Then in your tests, you can replace $stdout with a StringIO object that you can set expectations on. This has the added benefit of making your @ui object more flexible.
Given the code:
require 'rubygems'
require 'spec'
class UI
def ask_question(q)
end
end
describe UI do
before do
@ui = UI.new
end
it "should display the question" do
@ui.should_receive(:puts).with("Whats your name?").once
@ui.ask_question("Whats your name?")
end
end
I get the failure:
F
1) Spec::Mocks::MockExpectationError in 'UI should display the question'
#<UI:0xb738effc> expected :puts with ("Whats your name?") once, but received it 0 times /home/avdi/tmp/puts_spec.rb:15:
Finished in 0.002575 seconds
1 example, 1 failure
What version of RSpec are you using?
You can try stringio or ZenTest, the following ruby-talk thread has more info.
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