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