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How to use negatedFailureMessage method of io.kotest.matchers.internal class

Best Kotest code snippet using io.kotest.matchers.internal.negatedFailureMessage

Matcher.kt

Source:Matcher.kt

...18   }19   fun invert(): Matcher<T> = object : Matcher<T> {20      override fun test(value: T): MatcherResult {21         val result = this@Matcher.test(value)22         return MatcherResult(!result.passed(), { result.negatedFailureMessage() }, { result.failureMessage() })23      }24   }25   infix fun <U> compose(fn: (U) -> T): Matcher<U> = object : Matcher<U> {26      override fun test(value: U): MatcherResult = this@Matcher.test(fn(value))27   }28}29infix fun <T> Matcher<T>.and(other: Matcher<T>): Matcher<T> = object : Matcher<T> {30   override fun test(value: T): MatcherResult {31      val r = this@and.test(value)32      return if (!r.passed())33         r34      else35         other.test(value)36   }37}38infix fun <T> Matcher<T>.or(other: Matcher<T>): Matcher<T> = object : Matcher<T> {39   override fun test(value: T): MatcherResult {40      val r = this@or.test(value)41      return if (r.passed())42         r43      else44         other.test(value)45   }46}47/**48 * A [Matcher] that asserts that the value is not `null` before performing the test.49 *50 * The matcher returned by [invert] will _also_ assert that the value is not `null`. Use this for matchers that51 * should fail on `null` values, whether called with `should` or `shouldNot`.52 */53internal abstract class NeverNullMatcher<T : Any> : Matcher<T?> {54   final override fun test(value: T?): MatcherResult {55      return if (value == null) MatcherResult(false, "Expecting actual not to be null", "")56      else testNotNull(value)57   }58   override fun invert(): Matcher<T?> = object : NeverNullMatcher<T>() {59      override fun testNotNull(value: T): MatcherResult {60         val result = this@NeverNullMatcher.testNotNull(value)61         return MatcherResult(!result.passed(), result.negatedFailureMessage(), result.failureMessage())62      }63   }64   abstract fun testNotNull(value: T): MatcherResult65}66fun <T : Any> neverNullMatcher(test: (T) -> MatcherResult): Matcher<T?> {67   return object : NeverNullMatcher<T>() {68      override fun testNotNull(value: T): MatcherResult {69         return test(value)70      }71   }72}73/**74 * An instance of [MatcherResult] contains the result of an evaluation of a [Matcher].75 */76interface MatcherResult {77   /**78    * Returns true if the matcher indicated this was a valid79    * value and false if the matcher indicated an invalid value.80    */81   fun passed(): Boolean82   /**83    * Returns a message indicating why the evaluation failed84    * for when this matcher is used in the positive sense. For example,85    * if a size matcher was used like `mylist should haveSize(5)` then86    * an appropriate error message would be "list should be size 5".87    */88   fun failureMessage(): String89   /**90    * Returns a message indicating why the evaluation91    * failed for when this matcher is used in the negative sense. For example,92    * if a size matcher was used like `mylist shouldNot haveSize(5)` then93    * an appropriate negated failure would be "List should not have size 5".94    */95   fun negatedFailureMessage(): String96   companion object {97      operator fun invoke(98         passed: Boolean,99         failureMessage: String,100         negatedFailureMessage: String101      ) = object : MatcherResult {102         override fun passed(): Boolean = passed103         override fun failureMessage(): String = failureMessage104         override fun negatedFailureMessage(): String = negatedFailureMessage105      }106      operator fun invoke(107         passed: Boolean,108         failureMessageFn: () -> String,109         negatedFailureMessageFn: () -> String110      ) = object : MatcherResult {111         override fun passed(): Boolean = passed112         override fun failureMessage(): String = failureMessageFn()113         override fun negatedFailureMessage(): String = negatedFailureMessageFn()114      }115   }116}...

matchers.kt

Source:matchers.kt

...71internal fun test(inverse: Boolean = false, block: () -> MatcherResult) {72  val result = block()73  if ((inverse && result.passed()) || (!inverse && !result.passed())) {74     errorCollector.collectOrThrow(75      failure(if (inverse) result.negatedFailureMessage() else result.failureMessage())76    )77  }78}...

uri.kt

Source:uri.kt

...12        val testResult = match.test(extractValue(value))13        return MatcherResult(14            testResult.passed(),15            { "Invalid Uri $name: ${testResult.failureMessage()}" },16            { "Invalid Uri $name: ${testResult.negatedFailureMessage()}" }17        )18    }19}20infix fun Uri.shouldHavePath(match: Matcher<String?>) = this should havePath(match)21infix fun Uri.shouldNotHavePath(match: Matcher<String?>) = this shouldNot havePath(match)22fun havePath(matcher: Matcher<String?>): Matcher<Uri> = uriHas("path", Uri::path, matcher)23infix fun Uri.shouldHavePath(expected: String?) = this should havePath(expected)24infix fun Uri.shouldNotHavePath(expected: String?) = this shouldNot havePath(expected)25fun havePath(expected: String?): Matcher<Uri> = havePath(be(expected))26infix fun Uri.shouldHavePath(expected: Regex) = this should havePath(expected)27infix fun Uri.shouldNotHavePath(expected: Regex) = this shouldNot havePath(expected)28fun havePath(expected: Regex): Matcher<Uri> = havePath(contain(expected))29infix fun Uri.shouldHaveQuery(expected: String) = this should haveQuery(expected)30infix fun Uri.shouldNotHaveQuery(expected: String) = this shouldNot haveQuery(expected)...

negatedFailureMessage

Using AI Code Generation

1val result = MatcherResult(false, "Custom Failure Message")2result.negatedFailureMessage() shouldBe "Custom Failure Message"3val result = MatcherResult(true, "Custom Failure Message")4result.failureMessage() shouldBe "Custom Failure Message"5val result = MatcherResult(false, "Custom Failure Message")6result.negatedFailureMessage() shouldBe "Custom Failure Message"7val result = MatcherResult(true, "Custom Failure Message")8result.failureMessage() shouldBe "Custom Failure Message"9val result = MatcherResult(false, "Custom Failure Message")10result.negatedFailureMessage() shouldBe "Custom Failure Message"11val result = MatcherResult(true, "Custom Failure Message")12result.failureMessage() shouldBe "Custom Failure Message"13val result = MatcherResult(false, "Custom Failure Message")14result.negatedFailureMessage() shouldBe "Custom Failure Message"15val result = MatcherResult(true, "Custom Failure Message")16result.failureMessage() shouldBe "Custom Failure Message"17val result = MatcherResult(false, "Custom Failure Message")18result.negatedFailureMessage() shouldBe "Custom Failure Message"19val result = MatcherResult(true, "Custom Failure Message")20result.failureMessage() shouldBe "Custom Failure Message"21val result = MatcherResult(false, "Custom Failure Message")22result.negatedFailureMessage() shouldBe "Custom Failure Message"23val result = MatcherResult(true, "Custom Failure Message")24result.failureMessage() shouldBe "Custom Failure Message"

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