rspec users - Jul 2010 - How to test a method that return random values

Hi,

How can I test this method using rspec ?

def self.generate_calculation number1, number2, operation
      number1 = rand(number1)
      number2 = rand(number2)
      ...
end

This method return an operation with those random numbers.

Any tip ?

On Jul 6, 2010, at 1:35 PM, Guilherme wrote:
> Hi,
> 
> How can I test this method using rspec ?
> 
> def self.generate_calculation number1, number2, operation
>      number1 = rand(number1)
>      number2 = rand(number2)
>      ...
> end
> 
> This method return an operation with those random numbers.
> 
> Any tip ?
Something like this:

OperationGenerator.stub(:rand).with(1).and_return(1)
OperationGenerator.stub(:rand).with(2).and_return(2)

expected = Addition.new(1,2)
actual = OperationGenerator.generate_calculation 1, 2, Addition

actual.should eq(expected)

HTH,
David