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

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

FloatingBigRationalTest.kt

Source:FloatingBigRationalTest.kt

...268            (POSITIVE_INFINITY / NEGATIVE_INFINITY).shouldBeNaN()269            (NEGATIVE_INFINITY / NEGATIVE_INFINITY).shouldBeNaN()270        }271        @Test272        fun `should invert infinities incorrectly`() {273            (ONE / POSITIVE_INFINITY) shouldBe ZERO274            (ONE / NEGATIVE_INFINITY) shouldBe ZERO275        }276        @Test277        fun `should cope with various infinities`() {278            (ZERO * POSITIVE_INFINITY).shouldBeNaN()279            (ZERO / POSITIVE_INFINITY) shouldBe ZERO280            (POSITIVE_INFINITY / ZERO).shouldBePositiveInfinity()281            (ZERO * NEGATIVE_INFINITY).shouldBeNaN()282            (ZERO / NEGATIVE_INFINITY) shouldBe ZERO283            (NEGATIVE_INFINITY / ZERO).shouldBeNegativeInfinity()284            (POSITIVE_INFINITY * NEGATIVE_INFINITY).shouldBeNegativeInfinity()285            (POSITIVE_INFINITY / NEGATIVE_INFINITY).shouldBeNaN()286        }...

ColumnTests.kt

Source:ColumnTests.kt

...24            "initials" to { it["Species"].map<String> { it.first() } concat it["Species"].map<String> { it.first() } }25        )26    }27    @Test28    fun `allow to negate and invert columns`() {29        (!BooleanCol("foo", listOf(false, true)))[0] shouldBe true30        (-IntCol("foo", listOf(1, 2)))[1] shouldBe -231        (-LongCol("foo", listOf(1L, 2L)))[1] shouldBe -2L32        (-DoubleCol("foo", listOf(1.2, 2.0)))[1] shouldBe -2.033        shouldThrow<UnsupportedOperationException> { (-BooleanCol("foo", listOf(true))) }34        shouldThrow<UnsupportedOperationException> { (!IntCol("foo", listOf(1))) }35        shouldThrow<UnsupportedOperationException> { (!LongCol("foo", listOf(1L))) }36        //37        shouldThrow<UnsupportedOperationException> { (!AnyCol("foo", listOf(1))) }38        shouldThrow<UnsupportedOperationException> { (-AnyCol("foo", listOf(1))) }39    }40    // https://github.com/holgerbrandl/krangl/issues/5441    @Test42    fun `allow to create new column conditionally`() {...

OperatorsTest.kt

Source:OperatorsTest.kt

...91        fun `should do nothing arithmetically`() {92            +(2 over 3) shouldBe (2 over 3)93        }94        @Test95        fun `should invert arithmetically`() {96            -(2 over 3) shouldBe (-2 over 3)97        }98        @Test99        fun `should increment`() {100            var a = ZERO101            ++a shouldBe ONE102        }103        @Test104        fun `should decrement`() {105            var a = ONE106            --a shouldBe ZERO107        }108    }109    @Nested110    inner class Ring {111        @Test112        fun `should multiply big rational`() {113            (3 over 5) * (2 over 3) shouldBe (2 over 5)114        }115        @Test116        fun `should multiply big decimal`() {117            (1.0.big * ONE) shouldBe ONE118            (ONE * 1.0.big) shouldBe ONE119        }120        @Test121        fun `should multiply double`() {122            (1.0 * ONE) shouldBe ONE123            (ONE * 1.0) shouldBe ONE124        }125        @Test126        fun `should multiply float`() {127            (1.0f * ONE) shouldBe ONE128            (ONE * 1.0f) shouldBe ONE129        }130        @Test131        fun `should multiply big integer`() {132            (1.big * ONE) shouldBe ONE133            (ONE * 1.big) shouldBe ONE134        }135        @Test136        fun `should multiply long`() {137            (1L * ONE) shouldBe ONE138            (ONE * 1L) shouldBe ONE139        }140        @Test141        fun `should multiply int`() {142            (1 * ONE) shouldBe ONE143            (ONE * 1) shouldBe ONE144        }145        @Test146        fun `should raise`() {147            (3 over 5) `^` 0 shouldBe ONE148            (3 over 5) `^` 2 shouldBe (9 over 25)149            (3 over 5) `^` -2 shouldBe (25 over 9)150        }151        @Test152        fun `should define by fiat 0^0`() {153            ZERO `^` 0 shouldBe ONE154        }155        @Test156        fun `should complain on inverting zero`() {157            assertThrows<ArithmeticException> {158                ZERO `^` -1159            }160        }161    }162    @Nested163    inner class Field {164        @Test165        fun `should divide big rational`() {166            (3 over 5) / (2 over 3) shouldBe (9 over 10)167        }168        @Test169        fun `should divide big decimal`() {170            (1.0.big / ONE) shouldBe ONE171            (ONE / 1.0.big) shouldBe ONE172        }173        @Test174        fun `should divide double`() {175            (1.0 / ONE) shouldBe ONE176            (ONE / 1.0) shouldBe ONE177        }178        @Test179        fun `should divide float`() {180            (1.0f / ONE) shouldBe ONE181            (ONE / 1.0f) shouldBe ONE182        }183        @Test184        fun `should divide big integer`() {185            (1.big / ONE) shouldBe ONE186            (ONE / 1.big) shouldBe ONE187        }188        @Test189        fun `should divide long`() {190            (1L / ONE) shouldBe ONE191            (ONE / 1L) shouldBe ONE192        }193        @Test194        fun `should divide int`() {195            (1 / ONE) shouldBe ONE196            (ONE / 1) shouldBe ONE197        }198        @Test199        fun `should modulo big rational`() {200            (3 over 5) % (2 over 3) shouldBe ZERO201        }202        @Test203        fun `should modulo big decimal`() {204            (1.0.big % ONE) shouldBe ZERO205            (ONE % 1.0.big) shouldBe ZERO206        }207        @Test208        fun `should modulo double`() {209            (1.0 % ONE) shouldBe ZERO210            (ONE % 1.0) shouldBe ZERO211        }212        @Test213        fun `should modulo float`() {214            (1.0f % ONE) shouldBe ZERO215            (ONE % 1.0f) shouldBe ZERO216        }217        @Test218        fun `should modulo big integer`() {219            (1.big % ONE) shouldBe ZERO220            (ONE % 1.big) shouldBe ZERO221        }222        @Test223        fun `should modulo long`() {224            (1L % ONE) shouldBe ZERO225            (ONE % 1L) shouldBe ZERO226        }227        @Test228        fun `should modulo int`() {229            (1 % ONE) shouldBe ZERO230            (ONE % 1) shouldBe ZERO231        }232        @Test233        fun `should not modulo by 0`() {234            shouldThrow<ArithmeticException> {235                ONE % ZERO236            }237            shouldThrow<ArithmeticException> {238                ONE % BFloating.ZERO239            }240            shouldThrow<ArithmeticException> {241                BFloating.ONE % ZERO242            }243            shouldThrow<ArithmeticException> {244                ONE % 0.0245            }246            shouldThrow<ArithmeticException> {247                0.0 % ZERO248            }249            shouldThrow<ArithmeticException> {250                ONE % 0.0f251            }252            shouldThrow<ArithmeticException> {253                1.0f % ZERO254            }255            shouldThrow<ArithmeticException> {256                ONE % BFixed.ZERO257            }258            shouldThrow<ArithmeticException> {259                BFixed.ONE % ZERO260            }261            shouldThrow<ArithmeticException> {262                1L % ZERO263            }264            shouldThrow<ArithmeticException> {265                ONE % 0266            }267            shouldThrow<ArithmeticException> {268                1 % ZERO269            }270        }271        @Test272        fun `should divide with remainder`() {273            (6 over 1).divideAndRemainder(TWO) shouldBe ((3 over 1) to ZERO)274            (13 over 2).divideAndRemainder(3 over 1) shouldBe275                ((2 over 1) to (1 over 2))276            (-13 over 2).divideAndRemainder(-3 over 1) shouldBe277                ((2 over 1) to (-1 over 2))278            (-13 over 2).divideAndRemainder(3 over 1) shouldBe279                ((-2 over 1) to (-1 over 2))280            (13 over 2).divideAndRemainder(-3 over 1) shouldBe281                ((-2 over 1) to (1 over 2))282        }283        @Test284        fun `should invert multiplicatively`() {285            (2 over 3).unaryDiv() shouldBe (3 over 2)286        }287    }288    @Test289    fun `should be â-ish`() {290        val twoThirds = (2 over 3)291        val threeHalves = (3 over 2)292        val fiveSevenths = (5 over 7)293        // Identity elements294        (twoThirds + ZERO) shouldBe twoThirds295        (twoThirds * ONE) shouldBe twoThirds296        // Inverses297        (twoThirds + -twoThirds) shouldBe ZERO298        (twoThirds * twoThirds.unaryDiv()) shouldBe ONE...

FixedBigRationalTest.kt

Source:FixedBigRationalTest.kt

...274                ZERO < Float.NaN275            }276        }277        @Test278        fun `should multiplicatively invert`() {279            shouldThrow<ArithmeticException> {280                ZERO.unaryDiv()281            }282        }283    }284}...

FloatingContinuedFractionTest.kt

Source:FloatingContinuedFractionTest.kt

...82    @Test83    fun `should have integer part`() =84        ((2 over 1).toContinuedFraction().integerPart) shouldBe TWO85    @Test86    fun `should invert`() {87        (2 over 1).toContinuedFraction().unaryDiv() shouldBe88            listOf(ZERO, 2 over 1)89        (1 over 2).toContinuedFraction().reciprocal shouldBe90            listOf(2 over 1)91    }92    @Test93    fun `should present continued fraction following convention`() {94        "${(3 over 1).toContinuedFraction()}" shouldBe "[3;]"95        "${(3245 over 1000).toContinuedFraction()}" shouldBe "[3; 4, 12, 4]"96    }97    @Test98    fun `should convert from continued fraction`() {99        FloatingContinuedFraction.valueOf(100            3.toBigInteger(),...

FixedContinuedFractionTest.kt

Source:FixedContinuedFractionTest.kt

...74    fun `should have integer part`() {75        (2 over 1).toContinuedFraction().integerPart shouldBe TWO76    }77    @Test78    fun `should invert`() {79        (2 over 1).toContinuedFraction().unaryDiv() shouldBe80            listOf(ZERO, 2 over 1)81        (1 over 2).toContinuedFraction().reciprocal shouldBe82            listOf(2 over 1)83    }84    @Test85    fun `should present continued fraction following convention`() {86        "${(3 over 1).toContinuedFraction()}" shouldBe "[3;]"87        "${(3245 over 1000).toContinuedFraction()}" shouldBe "[3; 4, 12, 4]"88    }89    @Test90    fun `should convert from continued fraction`() {91        FixedContinuedFraction.valueOf(92            3.toBigInteger(),...

Matcher.kt

Source:Matcher.kt

...14 */15interface Matcher<in T> {16   fun test(value: T): MatcherResult17   infix fun <U> contramap(f: (U) -> T): Matcher<U> = Matcher { this@Matcher.test(f(it)) }18   fun invert(): Matcher<T> = Matcher {19      with(test(it)) {20         MatcherResult(!passed(), { negatedFailureMessage() }, { failureMessage() })21      }22   }23   fun <T> Matcher<T>.invertIf(invert: Boolean): Matcher<T> = if (invert) invert() else this24   @Deprecated("Use contramap. Deprecated in 5.3", ReplaceWith("contramap(fn)"))25   infix fun <U> compose(fn: (U) -> T): Matcher<U> = Matcher { this@Matcher.test(fn(it)) }26   companion object {27      /**28       * Returns a [Matcher] for type T that will always fail with the given [error] message.29       */30      fun <T> failure(error: String) = Matcher<T> { invoke(false, { error }, { "" }) }31      /**32       * Create matcher with the given function to evaluate the value and return a MatcherResult33       *34       * @param tester The function that evaluates a value and returns a MatcherResult35       */36      inline operator fun <T> invoke(crossinline tester: (T) -> MatcherResult) = object : Matcher<T> {37         override fun test(value: T) = tester(value)38      }39   }40}41infix fun <T> Matcher<T>.and(other: Matcher<T>): Matcher<T> = Matcher {42   test(it)43      .takeUnless(MatcherResult::passed)44      ?: other.test(it)45}46infix fun <T> Matcher<T>.or(other: Matcher<T>): Matcher<T> = Matcher {47   test(it)48      .takeIf(MatcherResult::passed)49      ?: other.test(it)50}51/**52 * A [Matcher] that asserts that the value is not `null` before performing the test.53 *54 * The matcher returned by [invert] will _also_ assert that the value is not `null`. Use this for matchers that55 * should fail on `null` values, whether called with `should` or `shouldNot`.56 */57internal abstract class NeverNullMatcher<T : Any?> : Matcher<T?> {58   final override fun test(value: T?): MatcherResult {59      return if (value == null) invoke(false, { "Expecting actual not to be null" }, { "" })60      else testNotNull(value)61   }62   override fun invert(): Matcher<T?> = object : NeverNullMatcher<T?>() {63      override fun testNotNull(value: T?): MatcherResult {64         if (value == null) return invoke(false, { "Expecting actual not to be null" }, { "" })65         val result = this@NeverNullMatcher.testNotNull(value)66         return invoke(!result.passed(), { result.negatedFailureMessage() }, { result.failureMessage() })67      }68   }69   abstract fun testNotNull(value: T): MatcherResult70   companion object {71      /**72       * Create matcher with the given function to evaluate the value and return a MatcherResult73       *74       * @param tester The function that evaluates a value and returns a MatcherResult75       */76      inline operator fun <T : Any> invoke(crossinline tester: (T) -> MatcherResult) = object : NeverNullMatcher<T>() {...

invert

Using AI Code Generation

1    val inverted = object : Matcher<T> {2        override fun test(value: T): MatcherResult {3            val result = matcher.test(value)4            return MatcherResult(!result.passed(), result.failureMessage, result.negatedFailureMessage)5        }6    }7    return InvertMatcher(inverted)8}

invert

Using AI Code Generation

1    import io.kotest.matchers.internal.*2    import io.kotest.matchers.shouldBe3    import io.kotest.matchers.shouldNotBe4    val invert = Invert()5    val shouldBe = ShouldBe()6    val shouldNotBe = ShouldNotBe()7    invert(shouldBe(1, 2)) shouldBe shouldNotBe(1, 2)8    invert(shouldNotBe(1, 2)) shouldBe shouldBe(1, 2)9    invert(shouldNotBe(1, 2)) shouldNotBe shouldBe(1, 2)10    invert(shouldBe(1, 2)) shouldNotBe shouldNotBe(1, 2)11    invert(shouldBe(1, 2)) shouldBe shouldNotBe(1, 2)12    invert(invert(shouldBe(1, 2))) shouldBe shouldBe(1, 2)13    invert(invert(shouldBe(1, 2))) shouldNotBe shouldNotBe(1, 2)14    invert(invert(shouldBe(1, 2))) shouldBe shouldBe(1, 2)15    invert(invert(shouldNotBe(1, 2))) shouldBe shouldNotBe(1, 2)16    invert(invert(shouldNotBe(1, 2))) shouldNotBe shouldBe(1, 2)17    invert(invert(shouldBe(1, 2))) shouldBe shouldBe(1, 2)18    invert(invert(shouldNotBe(1, 2))) shouldBe shouldNotBe(1, 2)19    invert(invert(shouldNotBe(1, 2))) shouldNotBe shouldBe(1, 2)20    invert(invert(shouldBe(1, 2))) shouldBe shouldBe(1, 2)21    invert(invert(shouldNotBe(1, 2))) shouldBe shouldNotBe(1, 2)22    invert(invert(shouldNotBe(1, 2))) shouldNotBe shouldBe(1, 2)23    invert(invert(shouldBe(1, 2))) shouldBe shouldBe(1, 2)24    invert(invert(shouldNotBe(1, 2))) shouldBe shouldNotBe(1, 2)25    invert(invert(shouldNotBe(1, 2))) shouldNotBe shouldBe(1, 2)26    invert(invert(shouldBe(1, 2))) shouldBe shouldBe(1, 2)

invert

Using AI Code Generation

1    val result = 1.invert()2}3val result = 1.invert()4@file:Suppress("unused")5import io.kotest.matchers.Matcher6import io.kotest.matchers.MatcherResult7import io.kotest.matchers.should8import io.kotest.matchers.shouldBe9import io.kotest.matchers.shouldNot10fun <T> Matcher<T>.invert(): Matcher<T> = object : Matcher<T> {11    override fun test(value: T): MatcherResult {

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.