when:
        def result = dependencyHandler.someConf("someNotation", "someOther")

        then:
        result == null

        and:
        1 * dependencyFactory.createDependency("someNotation") >> dependency1
        1 * dependencyFactory.createDependency("someOther") >> dependency2
        1 * dependencySet.add(dependency1)
        1 * dependencySet.add(dependency2)
    }

        given:
        schema.attribute(Attribute.of('a', Flavor))

        when:
        schema.getMatchingStrategy(Attribute.of('someOther', Flavor))

        then:
        def e = thrown(IllegalArgumentException)
        e.message == 'Unable to find matching strategy for someOther'

        when:
        schema.getMatchingStrategy(Attribute.of('picard', Flavor))

        then: