Hey everyone. Is there a simpler way to capture (Mockito) a single parameter of a Kotlin function th...

# android

[Oleg Siboglov]

Hey everyone. Is there a simpler way to capture (Mockito) a single parameter of a Kotlin function that has multiple parameters, of which all have a default value.

fun foo(int: Int = 0, string: String = "")
verify(someMock).foo(int = intCaptor.capture)

Currently Mockito is throwing a InvalidUseOfMatchersException , claiming its expecting 5 matchers (actual number of parameters) and instead it only recorded one. Im hoping theres a better approach than creating 5 different captors.

[Brian Saltz Jr]

You should be able to mix captors with matchers, e.g. any() or eq(value). You’d still have to provide all 5 parameters, but you don’t need to provide a captor for each one. You just can’t mix captors/matchers with actual values, which is what your .foo() call is doing in your example.

[Oleg Siboglov]

That’s so obvious. Thank you!

[Brian Saltz Jr]

To be more clear, your example is compiling to:

verify(someMock).foo(int = intCaptor.capture(), string = "")

So it’s mixing a real value ("") with a captor/matcher. You can do this to fix it:

verify(someMock).foo(int = intCaptor.capture(), string = eq(""))

Or instead of eq(""), use any() if you truly don’t care if it’s using the default or not.

[Brian Saltz Jr]

np, good luck 🙂