模拟验证lambda参数 [英] mockk verify lambda argument

问题描述

我想验证通过lamdba传递的值. 该功能看起来像这样:

I'd like to verify the value which was passed in via a lamdba. The func looks like this:

fun save(entity: Any, idSupplier: () -> UUID): JsonEntity {
    return save(JsonEntity(idSupplier(), entity, entity::class.simpleName!!))
}

现在在我的测试中，我想验证为idSupplier传递的值.我做了一个模拟以返回save(...)的值，这样在我自己的save(...，()-> ...)中调用

Now within my test I'd like to verify the value which has been passed in for the idSupplier. I made a mock to return a value for the save(...) which is called in my own save(..., () -> ...) like this

every { jsonStorage.save(any<JsonEntity>()) } answers { value }

现在验证我现在有这个

verify(exactly = 1) { jsonStorage.save(event, any()) }

正在工作，但是我想知道已传递的确切值，即，如果实体的id为123，我想验证一下.

Which is working, but I'd like to know the exact value which has been passed, i.e. if the entity's id was 123, I'd like to verify this.

提前谢谢

推荐答案

您需要一个插槽用于捕获参数.

You need a Slot for capturing the parameters.

示例

val id = slot<UUID>()
every { save(any<JsonEntity>()) { capture(id)} } answers { value }

// `id.captured` contains the value passed 
// as a parameter in the lambda expression `idSupplier`

assertEquals(UUID.fromString("4195f789-2730-4f99-8b10-e5b9562210c1"), id.captured)

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