Verify no exceptions were thrown in Spock

Question

I am brand new to Spock and perused their online docs. I have a test case where I need to verify that my fixture's interaction with a non-mock collaborator does not produce an exception:

class FizzSpec extends Specification {
    def "no exception thrown when we hail buzz"() {
        given:
        Fizz fixture = new Fizz()
        Buzz buzz = new Buzz("YES", true, "Garble barb") // A non-mock!

        when:
        fixture.hail(buzz)

        // TODO: How to verify the hail didn't produce an exception?
        // then:
        // thrown() == null
    }
}

Any ideas as to how I can accomplish this?

If you know the exception type, you can do `notThrown(NullPointerException)` — tim_yates, Aug 20 '15 at 19:53

score 84 · Accepted Answer · answered Aug 20 '15 at 20:22

84

Found it.

You can use

noExceptionThrown()

To assert nothing was thrown

answered Aug 20 '15 at 20:22

tim_yates

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Here is the API definition http://spockframework.github.io/spock/javadoc/1.0/spock/lang/Specification.html#noExceptionThrown-- – aloksahoo Apr 06 '16 at 16:00
Do you write it after/before the statement that throws the exception? Or do you pass the statement as an argument to `noExceptionThrown()`? – Klesun Nov 04 '21 at 16:29

Verify no exceptions were thrown in Spock

1 Answers1