OK, I’m confused. I have this method defined (in ...

# getting-started

[Larry Garfield]

OK, I’m confused. I have this method defined (in a test class):

fun fakeThingie() = object : AThingieInterface {
  override fun doSomething(): Boolean = false
}

The documentation says this is the correct syntax for an anonymous class: https://kotlinlang.org/docs/object-declarations.html

However, my IDE is yelling at me that “object” is not a valid keyword in Kotlin and I should use Any. Er, what?

And yet the code does run; the IDE is just yelling at me, and there’s a bunch of warnings when running tests, but the relevant tests all pass. What is going on?

Edit: Wow, never mind. The mock class was missing a method from the interface. So of course the IDE was reporting it as a keyword issue. Because that makes total sense. /s

[David Kubecka]

That's quite strange. If you didn't implemented all the interface methods the code shouldn't even compile, IDE or not.

[CLOVIS]

Can you reproduce it on https://play.kotlinlang.org/?

[Joffrey]

@Larry Garfield are you sure you didn't also have a syntax error somewhere? I can't reproduce what you're saying neither in the playground nor in the IDE. In both cases, the error is clearly reported that a member is missing:
https://pl.kotl.in/PJQXwsmEE

[Larry Garfield]

The only errors I saw of any kind where it objecting to “object” when there was a missing method, and then the missing method. No other errors were reported, and tests were running despite that. I have no explanation.

[Joffrey]

Do you have a snippet that reproduces the problem?

[Larry Garfield]

I do not. I fixed it last night and it hasn’t reappeared.

[Larry Garfield]

I think I’m going to chalk this one up to gremlins for now. Not sure what else to do with it. 😕

[Joffrey]

Oh, ok. I tried to make random changes to see what could produce the error you mention (like capitalizing Object), but to no avail 😞 If one day you run into this again, please let me know how 🙏