behevioralStructural_StructuralOrderTest.kt

class OrderTest() {
    //…
    @Test
    fun `Should be cancelled if the order is unpaid`() {
        val orderSpecification = mockk<OrderSpecification>(relaxed = true)
        val order = Order(orderSpecification)
        //…make the order unpaid…
        every { orderSpecification.isCancellable(order) } returns true
        
        order.cancel()
        
        Assertions.assertTrue(order.isCancelled())
        verify(exactly = 1) {
            orderSpecification.isCancellable(match {
                it == order
            })
        }
    }
}