Ilya Gorbunov
98 lines
3.7 KiB
Kotlin
98 lines
3.7 KiB
Kotlin
/*
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* Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
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* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
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*/
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package random
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import test.io.*
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import kotlin.random.*
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import kotlin.test.*
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class RandomSerializationTest {
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@Test
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fun defaultIsSerializable() {
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val instance = Random
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discardSomeValues(instance)
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assertSame(instance, serializeAndDeserialize(instance))
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}
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private fun discardSomeValues(instance: Random) {
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instance.nextInt()
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instance.nextDouble()
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instance.nextLong()
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instance.nextBytes(64)
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}
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private fun testRandomsHaveSameState(first: Random, second: Random) {
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assertEquals(first.nextInt(), second.nextInt())
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assertEquals(first.nextDouble(), second.nextDouble())
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assertEquals(first.nextLong(), second.nextLong())
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assertTrue(first.nextBytes(64).contentEquals(second.nextBytes(64)))
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}
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@Test
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fun deserializeDefault() {
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val randomSerialized = serializeToHex(Random)
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try {
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assertSame(
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expected = Random,
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actual = deserializeFromHex("ac ed 00 05 73 72 00 27 6b 6f 74 6c 69 6e 2e 72 61 6e 64 6f 6d 2e 52 61 6e 64 6f 6d 24 44 65 66 61 75 6c 74 24 53 65 72 69 61 6c 69 7a 65 64 00 00 00 00 00 00 00 00 02 00 00 78 70")
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)
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} catch (e: Throwable) {
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fail("Actual serialized form: $randomSerialized", e)
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}
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}
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@Test
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fun deserializeXorWow() {
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fun checkEquivalentToSerialized(instance: Random, serializedHex: String) {
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val serialized = serializeToHex(instance)
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try {
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val deserialized = deserializeFromHex<Random>(serializedHex)
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testRandomsHaveSameState(instance, deserialized)
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} catch (e: Throwable) {
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fail("Actual serialized from: $serialized", e)
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}
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}
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checkEquivalentToSerialized(
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instance = Random(0),
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serializedHex = "ac ed 00 05 73 72 00 1a 6b 6f 74 6c 69 6e 2e 72 61 6e 64 6f 6d 2e 58 6f 72 57 6f 77 52 61 6e 64 6f 6d 00 00 00 00 00 00 00 00 02 00 06 49 00 06 61 64 64 65 6e 64 49 00 01 76 49 00 01 77 49 00 01 78 49 00 01 79 49 00 01 7a 78 70 01 61 f1 40 23 9d 3d b3 c9 07 82 1d 6a 67 48 b0 e3 f9 bd 0c b6 5b de 32"
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)
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checkEquivalentToSerialized(
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instance = Random(0).apply { repeat(64) { nextLong() } }, // advance state by discarding values
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serializedHex = "ac ed 00 05 73 72 00 1a 6b 6f 74 6c 69 6e 2e 72 61 6e 64 6f 6d 2e 58 6f 72 57 6f 77 52 61 6e 64 6f 6d 00 00 00 00 00 00 00 00 02 00 06 49 00 06 61 64 64 65 6e 64 49 00 01 76 49 00 01 77 49 00 01 78 49 00 01 79 49 00 01 7a 78 70 04 25 d3 c0 be 0e 05 94 fd be 13 de a4 17 b2 90 b0 de a4 64 9c 72 81 64"
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)
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}
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@Test
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fun xorwowIsSerializable() {
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val instance = Random(0)
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discardSomeValues(instance)
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val deserialized = serializeAndDeserialize(instance)
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testRandomsHaveSameState(instance, deserialized)
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}
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@Test
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fun wrapperOfKotlinRandomIsSerializable() {
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val java = Random(0).asJavaRandom()
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java.nextInt()
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java.nextDouble()
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java.nextLong()
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java.nextBytes(ByteArray(64) { 0 })
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val deserialized = serializeAndDeserialize(java)
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testRandomsHaveSameState(java.asKotlinRandom(), deserialized.asKotlinRandom())
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}
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@Test
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fun wrapperOfJavaRandomIsSerializable() {
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val kotlin = java.util.Random(0).asKotlinRandom()
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discardSomeValues(kotlin)
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val deserialized = serializeAndDeserialize(kotlin)
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testRandomsHaveSameState(kotlin, deserialized)
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}
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}
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