Alexander Korepanov
66 lines
2.1 KiB
Kotlin
66 lines
2.1 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 test.reflection
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import test.*
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import kotlin.reflect.*
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import kotlin.test.*
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class KClassTest {
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@Test
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fun className() {
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assertEquals("KClassTest", KClassTest::class.simpleName)
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// assertEquals(null, object {}::class.simpleName) // doesn't work as documented in JDK < 9, see KT-23072
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}
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@Test
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fun extendsKClassifier() {
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assertStaticAndRuntimeTypeIs<KClassifier>(KClassTest::class)
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}
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@Test
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fun isInstanceCastSafeCast() {
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fun <T : Any> checkIsInstance(kclass: KClass<T>, value: Any?, expectedResult: Boolean) {
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if (expectedResult) {
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assertTrue(kclass.isInstance(value))
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assertSame(value, kclass.safeCast(value))
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assertSame(value, kclass.cast(value))
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} else {
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assertFalse(kclass.isInstance(value))
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assertNull(kclass.safeCast(value))
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assertFailsWith<ClassCastException> { kclass.cast(value) }
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}
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}
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val numberClass = Number::class
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checkIsInstance(numberClass, 1, true)
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checkIsInstance(numberClass, 1.0, true)
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checkIsInstance(numberClass, null, false)
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checkIsInstance(numberClass, "42", false)
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}
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@Test
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fun testKClassEquals() {
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assertFalse(Nothing::class == KClassTest::class)
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assertFalse(KClassTest::class == Nothing::class)
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assertFalse(String::class == Nothing::class)
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assertFalse(Nothing::class == String::class)
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assertFalse(Unit::class == Nothing::class)
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assertFalse(Nothing::class == Unit::class)
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assertFalse(KClassTest::class == String::class)
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assertFalse(String::class == KClassTest::class)
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assertTrue(Nothing::class == Nothing::class)
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assertTrue(Unit::class == Unit::class)
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assertTrue(String::class == String::class)
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assertTrue(KClassTest::class == KClassTest::class)
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}
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}
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