How to use onEval method of io.kotest.assertions.timing.EventuallyConfig class

Best Kotest code snippet using io.kotest.assertions.timing.EventuallyConfig.onEval

eventually.kt

Source:eventually.kt Github

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...84 fun isLongWait() = times == 1 && lastDelayPeriod > lastInterval85 while (attemptsLeft() || isLongWait()) {86 try {87 val result = f()88 listener.onEval(EventuallyState(result, start, end, times, firstError, lastError))89 if (predicate(result)) {90 errorCollector.setCollectionMode(originalAssertionMode)91 return result92 } else {93 predicateFailedTimes++94 }95 } catch (e: Throwable) {96 if (AssertionError::class.isInstance(e) || config.exceptionClass?.isInstance(e) == true) {97 if (firstError == null) {98 firstError = e99 } else {100 lastError = e101 }102 listener.onEval(EventuallyState(null, start, end, times, firstError, lastError))103 } else {104 throw e105 }106 }107 times++108 lastInterval = config.interval.next(times)109 val delayMark = TimeSource.Monotonic.markNow()110 delay(lastInterval)111 lastDelayPeriod = delayMark.elapsedNow()112 }113 errorCollector.setCollectionMode(originalAssertionMode)114 val message = StringBuilder().apply {115 appendLine("Eventually block failed after ${config.duration}; attempted $times time(s); ${config.interval} delay between attempts")116 if (predicateFailedTimes > 0) {117 appendLine("The provided predicate failed $predicateFailedTimes times")118 }119 if (firstError != null) {120 appendLine("The first error was caused by: ${firstError.message}")121 appendLine(firstError.stackTraceToString())122 }123 if (lastError != null) {124 appendLine("The last error was caused by: ${lastError.message}")125 appendLine(lastError.stackTraceToString())126 }127 }128 throw failure(message.toString())129}130data class EventuallyConfig(131 val duration: Duration = Duration.INFINITE,132 val interval: Interval = 25.milliseconds.fixed(),133 val retries: Int = Int.MAX_VALUE,134 val exceptionClass: KClass<out Throwable>? = Throwable::class,135) {136 init {137 require(retries > 0) { "Retries should not be less than one" }138 require(!duration.isNegative()) { "Duration cannot be negative" }139 }140}141data class EventuallyState<T>(142 val result: T?,143 val start: TimeMark,144 val end: TimeMark,145 val iteration: Int,146 val firstError: Throwable?,147 val thisError: Throwable?,148)149typealias EventuallyPredicate<T> = (T) -> Boolean150fun interface EventuallyListener<T> {151 fun onEval(state: EventuallyState<T>)152}...

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onEval

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1val event = io.kotest.assertions.timing.EventuallyConfig ( 1 , 1 ) . onEval { result -> result . shouldBe ( 1 ) }2val event = io.kotest.assertions.timing.EventuallyConfig ( 1 , 1 ) . onEval { result -> result . shouldBe ( 1 ) }3val event = io.kotest.assertions.timing.EventuallyConfig ( 1 , 1 ) . onEval { result -> result . shouldBe ( 1 ) }4val event = io.kotest.assertions.timing.EventuallyConfig ( 1 , 1 ) . onEval { result -> result . shouldBe ( 1 ) }5val event = io.kotest.assertions.timing.EventuallyConfig ( 1 , 1 ) . onEval { result -> result . shouldBe ( 1 ) }6val event = io.kotest.assertions.timing.EventuallyConfig ( 1 , 1 ) . onEval { result -> result . shouldBe ( 1 ) }7val event = io.kotest.assertions.timing.EventuallyConfig ( 1 , 1 ) . onEval { result -> result . shouldBe ( 1 ) }8val event = io.kotest.assertions.timing.EventuallyConfig ( 1

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