Ilya Gorbunov
f889d25287
TestClock.plusAssign(Duration) is for advancing TestClock time. Hide reading value, do not allow to provide initial reading, fix clock unit to nanoseconds at construction time.
62 lines
2.2 KiB
Kotlin
62 lines
2.2 KiB
Kotlin
/*
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* Copyright 2010-2019 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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@file:UseExperimental(ExperimentalTime::class)
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package test.time
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import kotlin.test.*
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import kotlin.time.*
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class TestClockTest {
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@Test
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fun overflows() {
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for (enormousDuration in listOf(Duration.INFINITE, Double.MAX_VALUE.nanoseconds, Long.MAX_VALUE.nanoseconds * 2)) {
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assertFailsWith<IllegalStateException>(enormousDuration.toString()) { TestClock() += enormousDuration }
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assertFailsWith<IllegalStateException>((-enormousDuration).toString()) { TestClock() += -enormousDuration }
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}
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val moderatePositiveDuration = Long.MAX_VALUE.takeHighestOneBit().nanoseconds
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val borderlinePositiveDuration = Long.MAX_VALUE.nanoseconds // rounded to 2.0^63, which is slightly more than Long.MAX_VALUE
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val borderlineNegativeDuration = Long.MIN_VALUE.nanoseconds
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run {
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val clock = TestClock()
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clock += moderatePositiveDuration
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assertFailsWith<IllegalStateException>("Should overflow positive") { clock += moderatePositiveDuration }
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}
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run {
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val clock = TestClock()
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clock += borderlinePositiveDuration
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assertFailsWith<IllegalStateException>("Should overflow positive") { clock += 1.nanoseconds }
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}
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run {
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val clock = TestClock()
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clock += borderlineNegativeDuration
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assertFailsWith<IllegalStateException>("Should overflow negative") { clock += -1.nanoseconds }
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}
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run {
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val clock = TestClock()
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clock += moderatePositiveDuration
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// does not overflow event if duration doesn't fit in long
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clock += -moderatePositiveDuration + borderlineNegativeDuration
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}
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}
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@Test
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fun nanosecondRounding() {
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val clock = TestClock()
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val mark = clock.mark()
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repeat(10_000) {
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clock += 0.9.nanoseconds
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assertEquals(Duration.ZERO, mark.elapsed())
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}
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clock += 1.9.nanoseconds
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assertEquals(1.nanoseconds, mark.elapsed())
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}
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} |