mockedConstruction and context about mockito-kotlin HOT 1 CLOSED

// DB class

class Db(url: String) {
    init {
        println("connecting to db $url")
    }

    fun ping(): String {
        return "pong"
    }
}

// App class

class App(url: String) {
    val db = Db(url)
}

@Test
    fun `verify constructor arguments`() {
        // tip from https://groups.google.com/g/mockito/c/WqPlcNrvbOw?pli=1
        // https://github.com/mockito/mockito-kotlin/issues/495

        val mockDbUrl = "http://foo.bar:3306"

        // we use this list to store the arguments
        val constructorArgs: MutableList<Any?> = ArrayList()
        mockConstruction(Db::class.java) {
                                         mock, context -> constructorArgs.addAll(context.arguments())
        }.use { mock ->

            App(mockDbUrl)

            assertTrue(mock.constructed().size == 1)

            assertEquals(mockDbUrl, constructorArgs[0])
        }
    }