Alexander Udalov
46 lines
1.0 KiB
Kotlin
46 lines
1.0 KiB
Kotlin
/*
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* Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
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* that can be found in the license/LICENSE.txt file.
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*/
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package test.utils
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import kotlin.test.*
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class LazyTest {
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@Test fun initializationCalledOnce() {
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var callCount = 0
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val lazyInt = lazy { ++callCount }
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assertEquals(0, callCount)
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assertFalse(lazyInt.isInitialized())
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assertEquals(1, lazyInt.value)
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assertEquals(1, callCount)
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assertTrue(lazyInt.isInitialized())
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lazyInt.value
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assertEquals(1, callCount)
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}
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@Test fun alreadyInitialized() {
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val lazyInt = lazyOf(1)
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assertTrue(lazyInt.isInitialized())
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assertEquals(1, lazyInt.value)
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}
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@Test fun lazyToString() {
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var callCount = 0
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val lazyInt = lazy { ++callCount }
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assertNotEquals("1", lazyInt.toString())
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assertEquals(0, callCount)
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assertEquals(1, lazyInt.value)
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assertEquals("1", lazyInt.toString())
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assertEquals(1, callCount)
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}
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}
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