MockCaveatTest.kt

@Test
fun `should retrieve talks`() {

    val mockedTalk = mock(Talk::class.java)
    given(mockedTalk.format).willReturn(IGNITE)
    given(mockedTalk.duration).willReturn(Duration.ofHours(1))
    // this resulted Talk Object is invalid, the source of truth is the duration
    // but here with mockito we overload the format computation logic
    given(searchTalks.forTopics(anySet())).willReturn(setOf(mockedTalk))

    val recommendTalks = TalksAdvisor(searchTalks, recommendations, profiles)

    val recommendation = recommendTalks.satisfying(GuestCriteria(setOf(), setOf(IGNITE)))

    assertThat(recommendation.talks).containsExactly(mockedTalk) //it should have been filtered
    assertThat(recommendation.talks.first().format).isEqualTo(IGNITE)
    assertThat(recommendation.talks.first().duration).isEqualTo(Duration.ofHours(1))
    //the test is incorrect but will still pass
}