Files
kotlin-fork/backend.native/tests/external/stdlib/collections/MapTest/mapKeys.kt
T
Ilya Matveev 85827b4880 tests: Copy stdlib tests from Kotlin/JVM
This patch copies Kotlin/JVM stdlib tests (libraries/stdlib/test)
excepting ones with explicit java dependencies. It also transforms
the tests to use them as box-tests.
2017-04-07 17:21:11 +07:00

16 lines
456 B
Kotlin

import kotlin.test.*
fun <T> assertStaticTypeIs(value: T) {}
fun box() {
val m1 = mapOf("beverage" to "beer", "location" to "Mells")
val m2 = m1.mapKeys { it.key + "2" }
assertEquals(mapOf("beverage2" to "beer", "location2" to "Mells"), m2)
val m1p: Map<out String, String> = m1
val m3 = m1p.mapKeysTo(mutableMapOf()) { it.key.length }
assertStaticTypeIs<MutableMap<Int, String>>(m3)
assertEquals(mapOf(8 to "Mells"), m3)
}