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How to use ErrorCollector.pushErrorAndMaybeThrow method of io.kotest.assertions.errorAndAssertionsScope class

Best Kotest code snippet using io.kotest.assertions.errorAndAssertionsScope.ErrorCollector.pushErrorAndMaybeThrow

errorAndAssertionsScope.kt

Source:errorAndAssertionsScope.kt

1package io.kotest.assertions2import io.kotest.common.ExperimentalKotest3import kotlinx.coroutines.withContext4import kotlin.coroutines.AbstractCoroutineContextElement5import kotlin.coroutines.CoroutineContext6import kotlin.coroutines.coroutineContext7internal typealias Failures = List<Throwable>8internal typealias Assertions = Int9internal class AssertionBlockContextElement : AbstractCoroutineContextElement(Key) {10   companion object Key : CoroutineContext.Key<AssertionBlockContextElement>11}12/**13 * [errorAndAssertionsScope] runs [block] in a "clean" scope.14 * The original error and assertion counts are stored and set to empty before the [block] is run.15 * Once the block is executed, the result [T], the [Failures], and the number of [Assertions] are stored for return.16 * The original error and assertion counts are replaced into their respective tracking systems [errorCollector] and [assertionCounter].17 *18 * The calling function is responsible for inserting the resultant [Failures] and [Assertions] into [errorCollector] and [assertionCounter] if appropriate.19 *20 * @return The result [T] of the block function, the [Failures] that block had, and the number of [Assertions] executed.21 */22@ExperimentalKotest23internal suspend fun <T> errorAndAssertionsScope(block: suspend () -> T): Triple<Result<T>, Failures, Assertions> {24   if (coroutineContext[AssertionBlockContextElement] != null) {25      throw IllegalStateException("Assertion block functions one, any, and all are limited to a depth of 1")26   }27   val originalFailures = errorCollector.getAndReplace(listOf())28   val originalAssertions = assertionCounter.getAndReset()29   val originalMode = errorCollector.getCollectionMode()30   errorCollector.setCollectionMode(ErrorCollectionMode.Soft)31   val result = runCatching {32      withContext(AssertionBlockContextElement()) {33         block()34      }35   }36   errorCollector.setCollectionMode(originalMode)37   val resultFailures = errorCollector.getAndReplace(originalFailures)38   val resultAssertions = assertionCounter.getAndReset()39   repeat(originalAssertions) { assertionCounter.inc() }40   return Triple(result, resultFailures, resultAssertions)41}42/**43 * Pushes the provided [error] onto the [errorCollector] and throws if the configured collection mode is [ErrorCollectionMode.Hard]44 */45@ExperimentalKotest46internal fun ErrorCollector.pushErrorAndMaybeThrow(error: Throwable) {47   pushError(error)48   if (getCollectionMode() == ErrorCollectionMode.Hard) {49      throwCollectedErrors()50   }51}...

one.kt

Source:one.kt

1package io.kotest.assertions2import io.kotest.common.ExperimentalKotest3/**4 * Executes the given lambda and expects exactly one assertion to succeed.5 * If zero, two or more assertions succeed then this will cause this block to fail.6 *7 * ```8 *   one {9 *      "foo" shouldBe "bar"10 *      "foo" shouldBe "foo11 *      "foo" shouldBe "baz"12 *   }13 * ```14 */15@ExperimentalKotest16suspend fun <T> one(assertions: suspend () -> T): T {17   val (result, failures, assertionsCount) = errorAndAssertionsScope { assertions() }18   assertionCounter.inc(assertionsCount)19   if (assertionsCount < 2) {20      errorCollector.collectOrThrow(failures + failure("One cannot ensure a mutual exclusion with less than two assertions"))21   }22   if (assertionsCount == failures.size + 1) {23      return result.getOrThrow()24   }25   errorCollector.pushErrors(failures)26   val f = when {27      assertionsCount == failures.size -> failure("One expected a single assertion to succeed, but none succeeded.")28      assertionsCount > failures.size + 1 -> failure("One expected a single assertion to succeed, but more than one succeeded.")29      else -> failure("One expected a single assertion to succeed, but there were more failures than assertions.")30   }31   errorCollector.pushErrorAndMaybeThrow(f)32   throw f // one/all/any won't respect softly for now33}34/**35 * Executes the given lambda and expects exactly one assertion to succeed.36 * If zero, two or more assertions suceed then this will cause an exception.37 *38 * Returns the original value [t] on success for use in subsequent assertions.39 */40@ExperimentalKotest41suspend fun <T> one(t: T, assertions: suspend T.(T) -> Unit) = one {42   t.assertions(t)43   t44}...

any.kt

Source:any.kt

1package io.kotest.assertions2import io.kotest.common.ExperimentalKotest3/**4 * Runs multiple assertions and expects at least one to succeed, will suppress all exceptions otherwise.5 *6 * ```7 *   any {8 *      "foo" shouldBe "bar"9 *      "foo" shouldBe "foo10 *      "foo" shouldBe "baz"11 *   }12 * ```13 */14@ExperimentalKotest15suspend fun <T> any(assertions: suspend () -> T): T {16   val (result, failures, assertionCount) = errorAndAssertionsScope { assertions() }17   assertionCounter.inc(assertionCount)18   if (assertionCount > failures.size || failures.isEmpty() && assertionCount == 0) {19      return result.getOrThrow()20   }21   val f = failure("Any expected at least one assertion to succeed but they all failed")22   errorCollector.pushErrors(failures)23   errorCollector.pushErrorAndMaybeThrow(f)24   throw f25}26@ExperimentalKotest27suspend fun <T> any(t: T, assertions: suspend T.(T) -> Unit) = any {28   t.assertions(t)29   t30}...

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