mock out return of a method base on the number of invocation only in spock

Question

Is it possible to mock out the return value of a method in spock based on the nth time it was called? Note that I don't want to specify the parameters passed in because it does not matter for a specific test case.

For example, for the first call it should return x, for the second call it should return y.

Prieto

Quite strange requirement. It isn't possible out of the box, what You need/want to achieve? What is the scenario? – Select

@Select I have a service method that I iterate over until that method returns a specific value, now I just need to verify if the iterating process/ loop works as expected. – Prieto

Answer 1

Yes it is possible.

someObject.someMethod(*_) >>> [ 'x', 'y' ]

It will return x on first invocation and y on second invocation of the method.

Example:

void "test something"() {
    given:
    def sample = Mock(Sample) {
        someMethod(_) >>> ['Hello', 'World']
    }

    expect:
    sample.someMethod('foo') == 'Hello'
    sample.someMethod('bar') == 'World'
}

class Sample {
    def someMethod(def a) {
        return a
    }
}

Cloak

thank you!! this is what i needed too for my test – Plunger