How can I verify that a constructor is called with...

# mockk

[Matteo Mirk]

How can I verify that a constructor is called with certain parameters? I thought that after setting up mockkConstructor() I could verify the call with constructedWith(), but it's not working. Mockk is complaining:

Missing calls inside verify { ... } block.

Currently my test has this setup:

init {
  mockkConstructor(Context::class)
}

@Test
fun `ctor is called` {
  //constructor is called through a factory function...

  verify {
    constructedWith<Context>(
      EqMatcher("default"),
      // other matchers...
    )
  }
}

[Mattia Tommasone]

ah, that’s a tough one, i don’t think you can verify constructors

[hho]

That's https://github.com/mockk/mockk/issues/735

[Mattia Tommasone]

i don’t think there’s an easy way to do that, because you’d have to tell the classloader not to call the actual constructor when you’re in a verify block but instead just record the call

[Matteo Mirk]

Thanks for confirming guys, sadly I found out myself after too many failed attempts. I even tried to mockkStatic() the primary constructor and verify its call but it didn't work.
In the end I had to change the test and assert over stringified version of the instance. Thanks anyway!

[Mattia Tommasone]

generally speaking, constructors and mocking together is always a painful combo

[Mattia Tommasone]

so in this case i won’t say “i’d gladly review a PR about it if you want to implement constructor verification” because I know it’s not going to be fun 😄

[Matteo Mirk]

I agree haha