kotlin/compiler/testData/codegen/box/when/stringOptimization/nullability.kt

// IGNORE_BACKEND: JS_IR
// WITH_RUNTIME
// CHECK_CASES_COUNT: function=foo1 count=2
// CHECK_IF_COUNT: function=foo1 count=1
// CHECK_CASES_COUNT: function=foo2 count=4
// CHECK_IF_COUNT: function=foo2 count=0

import kotlin.test.assertEquals

fun foo1(x : String?) : String {
    when (x) {
        "abc", "cde" -> return "abc_cde"
        "efg", "ghi", null -> return "efg_ghi"
    }

    return "other"
}

fun foo2(x : String?) : String {
    when (x) {
        "abc", "cde" -> return "abc_cde"
        "efg", "ghi" -> return "efg_ghi"
        else -> return "other"
    }
}

fun box() : String {
    //foo1
    assertEquals("abc_cde", foo1("abc"))
    assertEquals("abc_cde", foo1("cde"))
    assertEquals("efg_ghi", foo1("efg"))
    assertEquals("efg_ghi", foo1("ghi"))
    assertEquals("efg_ghi", foo1(null))

    assertEquals("other",   foo1("xyz"))

    //foo2
    assertEquals("abc_cde", foo2("abc"))
    assertEquals("abc_cde", foo2("cde"))
    assertEquals("efg_ghi", foo2("efg"))
    assertEquals("efg_ghi", foo2("ghi"))


    assertEquals("other",   foo2("xyz"))
    assertEquals("other",   foo2(null))

    return "OK"
}