Is it possible to compare function types? Given something like: ```typealias Matcher = (String) -&g...

# kotest

[Michael Strasser]

Is it possible to compare function types?

Given something like:

typealias Matcher = (String) -> Boolean
data class Thing(matcher: Matcher)

This fails:

it("compares values of function types") {
    val testThing = Thing({ it.startsWith("test") })
    testThing.matcher shouldBe { it.startsWith("test") }
}

with messages like:

expected:<(kotlin.String) -> kotlin.Boolean> but was:<(kotlin.String) -> kotlin.Boolean>

[sam]

It can't compare the code inside the functions as that's not made available so it's comparing by reference here

[Michael Strasser]

Thanks! That’s what I thought.