Svyatoslav Kuzmich
68 lines
2.0 KiB
Kotlin
Vendored
68 lines
2.0 KiB
Kotlin
Vendored
// KJS_WITH_FULL_RUNTIME
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// EXPECTED_REACHABLE_NODES: 1545
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package foo
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data class Holder<T>(val v: T)
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data class Dat(val start: String, val end: String)
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class Obj(val start: String, val end: String)
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fun <T> assertSomeNotEqual(c: Iterable<T>) {
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val it = c.iterator()
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val first = it.next()
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while (it.hasNext()) {
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val item: T = it.next()
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if (item != first) {
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return;
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}
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}
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throw Exception("All elements are the same: $first")
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}
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fun <T> assertAllEqual(c: Iterable<out T>) {
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val it = c.iterator()
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val first = it.next()
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while (it.hasNext()) {
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val item: T = it.next()
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assertEquals(first, item)
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}
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}
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val hashCoder: (o: Any) -> Int = { o -> o.hashCode() }
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fun <T> wrapInH(t: T) = Holder(t)
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fun box(): String {
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// Check that same Dat's have the same hashcode.
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val sameDs = listOf(Dat("a", "b"), Dat("a", "b"))
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assertAllEqual(sameDs.map(hashCoder))
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// Check that different Dat's have different hashcodes (at least some of them).
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val differentDs = listOf(Dat("a", "b"), Dat("a", "c"), Dat("a", "d"))
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assertSomeNotEqual(differentDs.map(hashCoder))
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// Check the same on Obj's, which should be always different and with different hashcodes.
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val sameOs = listOf(Obj("a", "b"), Obj("a", "b"), Obj("a", "b"))
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val differentOs = listOf(Obj("a", "b"), Obj("a", "b"), Obj("a", "b"))
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// Obj's are always different.
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assertSomeNotEqual(sameOs.map(hashCoder))
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assertSomeNotEqual(differentOs.map(hashCoder))
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// Both Dat's and Obj's wrapped as Holder should retain their hashcode relations.
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val sameHDs = sameDs.map { wrapInH(it) }
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assertAllEqual(sameHDs.map(hashCoder))
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val differentHDs = differentDs.map { wrapInH(it) }
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assertSomeNotEqual(differentHDs.map(hashCoder))
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val sameHOs = sameOs.map { wrapInH(it) }
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assertSomeNotEqual(sameHOs.map(hashCoder))
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val differentHOs = differentOs.map { wrapInH(it) }
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assertSomeNotEqual(differentHOs.map(hashCoder))
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return "OK"
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}
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