How to use test method of io.kotest.matchers.collections.MatchInOrderSubsetProblem class

Best Kotest code snippet using io.kotest.matchers.collections.MatchInOrderSubsetProblem.test


Source:CollectionMatchers.kt Github


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1package io.kotest.matchers.collections2import io.kotest.assertions.ErrorCollectionMode3import io.kotest.assertions.errorCollector4import io.kotest.assertions.print.print5import io.kotest.assertions.runWithMode6import io.kotest.matchers.Matcher7import io.kotest.matchers.MatcherResult8import io.kotest.matchers.neverNullMatcher9fun <T> existInOrder(vararg ps: (T) -> Boolean): Matcher<Collection<T>?> = existInOrder(ps.asList())10/**11 * Assert that a collections contains a subsequence that matches the given subsequence of predicates, possibly with12 * values in between.13 */14fun <T> existInOrder(predicates: List<(T) -> Boolean>): Matcher<Collection<T>?> = neverNullMatcher { actual ->15 require(predicates.isNotEmpty()) { "predicates must not be empty" }16 var subsequenceIndex = 017 val actualIterator = actual.iterator()18 while (actualIterator.hasNext() && subsequenceIndex < predicates.size) {19 if (predicates[subsequenceIndex]( subsequenceIndex += 120 }21 MatcherResult(22 subsequenceIndex == predicates.size,23 { "${actual.print().value} did not match the predicates ${predicates.print().value} in order" },24 { "${actual.print().value} should not match the predicates ${predicates.print().value} in order" }25 )26}27fun <T> haveSize(size: Int): Matcher<Collection<T>> = haveSizeMatcher(size)28fun <T> singleElement(t: T): Matcher<Collection<T>> = object : Matcher<Collection<T>> {29 override fun test(value: Collection<T>) = MatcherResult(30 value.size == 1 && value.first() == t,31 { "Collection should be a single element of $t but has ${value.size} elements: ${value.print().value}" },32 { "Collection should not be a single element of $t" }33 )34}35fun <T> singleElement(p: (T) -> Boolean): Matcher<Collection<T>> = object : Matcher<Collection<T>> {36 override fun test(value: Collection<T>): MatcherResult {37 val filteredValue: List<T> = value.filter(p)38 return MatcherResult(39 filteredValue.size == 1,40 { "Collection should have a single element by a given predicate but has ${filteredValue.size} elements: ${value.print().value}" },41 { "Collection should not have a single element by a given predicate" }42 )43 }44}45fun <T : Comparable<T>> beSorted(): Matcher<List<T>> = sorted()46fun <T : Comparable<T>> sorted(): Matcher<List<T>> = sortedBy { it }47fun <T, E : Comparable<E>> beSortedBy(transform: (T) -> E): Matcher<List<T>> = sortedBy(transform)48fun <T, E : Comparable<E>> sortedBy(transform: (T) -> E): Matcher<List<T>> = object : Matcher<List<T>> {49 override fun test(value: List<T>): MatcherResult {50 val failure = value.withIndex().firstOrNull { (i, it) -> i != value.lastIndex && transform(it) > transform(value[i + 1]) }51 val elementMessage = when (failure) {52 null -> ""53 else -> ". Element ${failure.value} at index ${failure.index} was greater than element ${value[failure.index + 1]}"54 }55 return MatcherResult(56 failure == null,57 { "List ${value.print().value} should be sorted$elementMessage" },58 { "List ${value.print().value} should not be sorted" }59 )60 }61}62fun <T> matchEach(vararg fns: (T) -> Unit): Matcher<Collection<T>?> = matchEach(fns.asList())63fun <T> matchInOrder(vararg fns: (T) -> Unit): Matcher<Collection<T>?> = matchInOrder(fns.asList(), allowGaps = false)...

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