I'm having some difficulty figuring out the correc...

# announcements

[javaru]

I'm having some difficulty figuring out the correct syntax for calling a Vararg with lambdas. The Kotlin converter in IDEA gave me what is shown below. But it results in a compile error. What's the syntax I need?

public static void assertAll(String heading, Executable... executables)

// "Executable" is an interface with a single "execute()" method

// JAVA
assertAll("test the 'add' method",
          () -> assertEquals(4, calculator.add(2, 2)),
          () -> assertEquals(5, calculator.add(2, 3))
);

// KOTLIN
# the 'assertEquals' is underscored with error "None of the following functions can be called with the arguments supplied."
assertAll("test the 'add' method", 
          { assertEquals(4, calculator.add(2, 2)) },
          { assertEquals(5, calculator.add(2, 3)) }
         )

[mg6maciej]

javaru: This is JUnit 5, right?

[javaru]

Yes it is

[mg6maciej]

https://youtrack.jetbrains.com/issue/KT-16924

[mg6maciej]

fun assertAll(vararg executables: () -> Unit) {
    Assertions.assertAll(
            executables.map { Executable(it) }.stream()
    )
}

[mg6maciej]

This is a function I added before this is implemented in Kotlin.

[javaru]

Adding the Executable before the lambda works like a charm. Thanks. I'll vote for the feature requesting to simplify the syntax. Thanks for the assist!

[mg6maciej]

I'd suggest adding an assertAll function to your test code similar to that one I'm using to get it now.

[mg6maciej]

Might take some time before this is actually implemented in Kotlin.

[javaru]

A good idea. Thanks.