How to mock a constructor with a spy?

Question

I am currently trying to test my Exposed Kotlin code. I have a table that follows the form

object Foo: Table() {
   *parameters*
}

and a method that looks something like

fun addNewFoo(){
    Foo.insert { ... }
}

I'm testing addNewFoo and I want to verify the insert occurred, ideally using something like

verify { FooSpy.insert { ... } }

How do I mock the Foo table to be a spy so I can verify the call occurred, or what other approach should I take to verify this method being called?

score 0 · Answer 1 · answered Oct 09 '20 at 07:31

0

You can first mock your singleton Foo class using mockkObject() and then verify. Here is the code:

mockkObject(Foo) // mock the object
addNewFoo() // call function that we're testing
verify { Foo.insert(any()) } // verify

answered Oct 09 '20 at 07:31

Natig Babayev

Thanks! Normally this would work great, but unfortunately since ```Foo``` is an Exposed table, it has some weird properties, and this doesn't work. The ```insert``` needs to be inside a transaction, which makes it harder to test – jpthesolver2 Oct 09 '20 at 15:03

score 0 · Answer 2 · answered Oct 09 '20 at 15:25

0

There seems to be no real intended way for testing but making small test tables in a test data base is the closest you can get.

answered Oct 09 '20 at 15:25

Steph

2 Answers2