问题
I create a mock of a class with mockk. On this mock I now call a method that gets a lambda as a parameter.
This lambda serves as a callback to deliver state changes of the callback to the caller of the method.
class ObjectToMock() {
fun methodToCall(someValue: String?, observer: (State) -> Unit) {
...
}
}
How do I configure the mock to call the passed lambda?
回答1:
You can use answers:
val otm: ObjectToMock = mockk()
every { otm.methodToCall(any(), any())} answers {
secondArg<(String) -> Unit>().invoke("anything")
}
otm.methodToCall("bla"){
println("invoked with $it") //invoked with anything
}
Within the answers
scope you can access firstArg
, secondArg
etc and even get the expected type by providing it as a generic parameter. Note that I used invoke
to make it more readable, you can also invoke it as a normal function with empty parentheses.
来源:https://stackoverflow.com/questions/53673292/how-to-call-a-lambda-callback-with-mockk