Question

I have code for the user input:

class Z
  def self.input()
    val = $stdin.gets.chomp
    if val == "123"
      p "Ok"
    else
      p "none"
    end
  end
end

I want to test different data:

describe "Z" do
  it "should receive none"
    Object.stub!(:gets){"das"}
    Z.input
    Object.should_receive(:p).with("none")
  end
end

But i get an error:

Failure/Error: Object.should_receive(:p).with("none")
   (<Object (class)>).p("none")
       expected: 1 time
       received: 0 times

How to test the output?
Thanks.

Answer 1

Try this:

describe Z do
  it "should print into stdout" do
    $stdin.stub(:gets).and_return("das")
    $stdout.should_receive(:p).with("none")
    Z.input
  end
end