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How to use Zero class of io.kotest.matchers.doubles package

Best Kotest code snippet using io.kotest.matchers.doubles.Zero

DoubleMatchersTest.kt

Source:DoubleMatchersTest.kt

...26import io.kotest.matchers.doubles.shouldBeNegative27import io.kotest.matchers.doubles.shouldBeNegativeInfinity28import io.kotest.matchers.doubles.shouldBePositive29import io.kotest.matchers.doubles.shouldBePositiveInfinity30import io.kotest.matchers.doubles.shouldBeZero31import io.kotest.matchers.doubles.shouldNotBeBetween32import io.kotest.matchers.doubles.shouldNotBeGreaterThan33import io.kotest.matchers.doubles.shouldNotBeGreaterThanOrEqual34import io.kotest.matchers.doubles.shouldNotBeLessThan35import io.kotest.matchers.doubles.shouldNotBeLessThanOrEqual36import io.kotest.matchers.doubles.shouldNotBeNaN37import io.kotest.matchers.doubles.shouldNotBeNegative38import io.kotest.matchers.doubles.shouldNotBeNegativeInfinity39import io.kotest.matchers.doubles.shouldNotBePositive40import io.kotest.matchers.doubles.shouldNotBePositiveInfinity41import io.kotest.matchers.doubles.shouldNotBeZero42import io.kotest.matchers.should43import io.kotest.matchers.shouldBe44import io.kotest.matchers.shouldNot45import io.kotest.matchers.shouldNotBe46import io.kotest.property.arbitrary.filterNot47import io.kotest.property.checkAll48import kotlin.Double.Companion.MAX_VALUE49import kotlin.Double.Companion.MIN_VALUE50import kotlin.Double.Companion.NEGATIVE_INFINITY51import kotlin.Double.Companion.NaN52import kotlin.Double.Companion.POSITIVE_INFINITY53import kotlin.math.absoluteValue54class DoubleMatchersTest : FreeSpec() {55  init {56    "Between matcher" - {57      "Every numeric double that is not Double.MAX_VALUE" - {58        "Should match between" - {59          "When it's equal to the first number of the range" - {60            "With tolerance" {61              checkAll(100, nonMinNorMaxValueDoubles) {62                it.shouldMatchBetween(it, it.slightlyGreater(), it.toleranceValue())63              }64            }65            "Without tolerance" {66              checkAll(100, nonMinNorMaxValueDoubles) {67                it.shouldMatchBetween(it, it.slightlyGreater(), 0.0)68              }69            }70          }71          "When it's between the first number of the range and the last one" - {72            "With tolerance" {73              checkAll(100, nonMinNorMaxValueDoubles) {74                it.shouldMatchBetween(it.slightlySmaller(), it.slightlyGreater(), it.toleranceValue())75              }76            }77            "Without tolerance" {78              checkAll(100, nonMinNorMaxValueDoubles) {79                it.shouldMatchBetween(it.slightlySmaller(), it.slightlyGreater(), 0.0)80              }81            }82          }83          "When it's equal to the last number of the range" - {84            "With tolerance" {85              checkAll(100, nonMinNorMaxValueDoubles) {86                it.shouldMatchBetween(it.slightlySmaller(), it, it.toleranceValue())87              }88            }89            "Without tolerance" {90              checkAll(100, nonMinNorMaxValueDoubles) {91                it.shouldMatchBetween(it.slightlySmaller(), it, 0.0)92              }93            }94          }95        }96        "Should not match between" - {97          "When it's smaller than the first number of the range" - {98            "With tolerance" {99              checkAll(100, nonMinNorMaxValueDoubles) {100                it.shouldNotMatchBetween(it.slightlyGreater(), it.muchGreater(), it.toleranceValue())101              }102            }103            "Without tolerance" {104              checkAll(100, nonMinNorMaxValueDoubles) {105                it.shouldNotMatchBetween(it.slightlyGreater(), it.muchGreater(), 0.0)106              }107            }108          }109          "When it's bigger than the last number of the range" - {110            "With tolerance" {111              checkAll(100, nonMinNorMaxValueDoubles) {112                it.shouldNotMatchBetween(it.muchSmaller(), it.slightlySmaller(), it.toleranceValue())113              }114            }115            "Without tolerance" {116              checkAll(100, nonMinNorMaxValueDoubles) {117                it.shouldNotMatchBetween(it.muchSmaller(), it.slightlySmaller(), 0.0)118              }119            }120          }121        }122      }123    }124    "Less than matcher" - {125      "Every numeric double" - {126        "Should be less than" - {127          "Numbers bigger than itself" {128            checkAll(100, nonMinNorMaxValueDoubles) {129              it shouldMatchLessThan it.slightlyGreater()130              it shouldMatchLessThan it.muchGreater()131            }132          }133          "Infinity" {134            checkAll(100, nonMinNorMaxValueDoubles) {135              it shouldMatchLessThan POSITIVE_INFINITY136            }137          }138        }139        "Should not be less than" - {140          "Itself" {141            checkAll(100, nonMinNorMaxValueDoubles) {142              it shouldNotMatchLessThan it143            }144          }145          "Numbers smaller than itself" {146            checkAll(100, nonMinNorMaxValueDoubles) {147              it shouldNotMatchLessThan it.slightlySmaller()148              it shouldNotMatchLessThan it.muchSmaller()149            }150          }151          "Negative Infinity" {152            checkAll(100, nonMinNorMaxValueDoubles) {153              it shouldNotMatchLessThan it154            }155          }156          "NaN" {157            checkAll(100, nonMinNorMaxValueDoubles) {158              it shouldNotMatchLessThan NaN159            }160          }161        }162      }163      "The non-numeric double" - {164        "NaN" - {165          "Should not be less than" - {166            "Any numeric double" {167              checkAll(100, nonMinNorMaxValueDoubles) {168                NaN shouldNotMatchLessThan it169              }170            }171            "Any non-numeric double" {172              nonNumericDoubles.forEach {173                NaN shouldNotMatchLessThan it174              }175            }176          }177        }178        "Positive Infinity" - {179          "Should not be less than" - {180            "Any numeric double" {181              checkAll(100, nonMinNorMaxValueDoubles) {182                POSITIVE_INFINITY shouldNotMatchLessThan it183              }184            }185            "Any non-numeric double" {186              nonNumericDoubles.forEach {187                POSITIVE_INFINITY shouldNotMatchLessThan it188              }189            }190          }191        }192        "Negative Infinity" - {193          "Should be less than" - {194            "Any numeric double" {195              checkAll(100, nonMinNorMaxValueDoubles) {196                NEGATIVE_INFINITY shouldMatchLessThan it197              }198            }199            "Positive Infinity" {200              NEGATIVE_INFINITY shouldMatchLessThan POSITIVE_INFINITY201            }202          }203          "Should not be less than" - {204            "Itself" {205              NEGATIVE_INFINITY shouldNotMatchLessThan NEGATIVE_INFINITY206            }207            "NaN" {208              NEGATIVE_INFINITY shouldNotMatchLessThan NaN209            }210          }211        }212      }213    }214    "Positive matcher" - {215      "Zero" - {216        "Should not be positive" {217          0.0.shouldNotMatchPositive()218        }219      }220      "Every positive number" - {221        "Should be positive" {222          checkAll(100, numericDoubles.filterNot { it == 0.0 }) {223            it.absoluteValue.shouldMatchPositive()224          }225        }226      }227      "Every non-positive number" - {228        "Should not be positive" {229          checkAll(100, numericDoubles) {230            (-it.absoluteValue).shouldNotMatchPositive()231          }232        }233      }234      "The non-numeric double" - {235        "Positive Infinity" - {236          "Should be positive" {237            POSITIVE_INFINITY.shouldMatchPositive()238          }239        }240        "Negative Infinity" - {241          "Should not be positive" {242            NEGATIVE_INFINITY.shouldNotMatchPositive()243          }244        }245        "NaN" - {246          "Should not be positive" {247            NaN.shouldNotMatchPositive()248          }249        }250      }251    }252    "Negative matcher" - {253      "Zero" - {254        "Should not be negative" {255          0.0.shouldNotMatchNegative()256        }257      }258      "Every negative number" - {259        "Should be negative" {260          checkAll(100, numericDoubles.filterNot { it == 0.0 }) {261            (-it.absoluteValue).shouldMatchNegative()262          }263        }264      }265      "Every non-negative number" - {266        "Should not be negative" {267          checkAll(100, numericDoubles) {268            it.absoluteValue.shouldNotMatchNegative()269          }270        }271      }272      "The non-numeric double" - {273        "Positive Infinity" - {274          "Should not be negative" {275            POSITIVE_INFINITY.shouldNotMatchNegative()276          }277        }278        "Negative Infinity" - {279          "Should be negative" {280            NEGATIVE_INFINITY.shouldMatchNegative()281          }282        }283        "NaN" - {284          "Should not be negative" {285            NaN.shouldNotMatchNegative()286          }287        }288      }289    }290     "MultipleOf matcher" - {291        "Matches a simple multiple" {292           300.0 shouldBeMultipleOf 1.0293        }294        "Fails due to precision problems" {295           shouldFail {296              3.6e300 shouldBeMultipleOf 1.2297           }298        }299     }300    "Less than or equal matcher" - {301      "Every numeric double" - {302        "Should be less than or equal" - {303          "Itself" {304            checkAll(100, nonMinNorMaxValueDoubles) {305              it shouldMatchLessThanOrEqual it306            }307          }308          "Numbers bigger than itself" {309            checkAll(100, nonMinNorMaxValueDoubles) {310              it shouldMatchLessThanOrEqual it.muchGreater()311              it shouldMatchLessThanOrEqual it.slightlyGreater()312            }313          }314          "Positive Infinity" {315            checkAll(100, nonMinNorMaxValueDoubles) {316              it shouldMatchLessThanOrEqual POSITIVE_INFINITY317            }318          }319        }320        "Should not be less than or equal" - {321          "Any number smaller than itself" {322            checkAll(100, nonMinNorMaxValueDoubles) {323              it shouldNotMatchLessThanOrEqual it.slightlySmaller()324              it shouldNotMatchLessThanOrEqual it.muchSmaller()325            }326          }327          "Negative Infinity" {328            checkAll(100, nonMinNorMaxValueDoubles) {329              it shouldNotMatchLessThanOrEqual NEGATIVE_INFINITY330            }331          }332          "NaN" {333            checkAll(100, nonMinNorMaxValueDoubles) {334              it shouldNotMatchLessThanOrEqual NaN335            }336          }337        }338      }339      "The non-numeric double" - {340        "NaN" {341          "Should not be less than or equal" - {342            "Any numeric double" {343              checkAll(100, nonMinNorMaxValueDoubles) {344                NaN shouldNotMatchLessThanOrEqual it345              }346            }347            "Positive Infinity" {348              NaN shouldNotMatchLessThanOrEqual POSITIVE_INFINITY349            }350            "Negative Infinity" {351              NaN shouldNotMatchLessThanOrEqual NEGATIVE_INFINITY352            }353            "Itself" {354              NaN shouldNotMatchLessThanOrEqual NaN355            }356          }357        }358        "Positive Infinity" - {359          "Should be less than or equal" - {360            "Positive Infinity" {361              POSITIVE_INFINITY shouldMatchLessThanOrEqual POSITIVE_INFINITY362            }363          }364          "Should not be less than or equal" - {365            "Any numeric double" {366              checkAll(100, nonMinNorMaxValueDoubles) {367                POSITIVE_INFINITY shouldNotMatchLessThanOrEqual it368              }369            }370            "Negative Infinity" {371              POSITIVE_INFINITY shouldNotMatchLessThanOrEqual NEGATIVE_INFINITY372            }373            "NaN" {374              POSITIVE_INFINITY shouldNotMatchLessThanOrEqual NaN375            }376          }377        }378        "Negative Infinity" - {379          "Should be less than or equal" - {380            "Any numeric double" {381              checkAll(100, nonMinNorMaxValueDoubles) {382                NEGATIVE_INFINITY shouldMatchLessThanOrEqual it383              }384            }385            "Positive Infinity" {386              NEGATIVE_INFINITY shouldMatchLessThanOrEqual POSITIVE_INFINITY387            }388            "Itself" {389              NEGATIVE_INFINITY shouldMatchLessThanOrEqual NEGATIVE_INFINITY390            }391          }392          "Should not be less than or equal" - {393            "NaN" {394              NEGATIVE_INFINITY shouldNotMatchLessThanOrEqual NaN395            }396          }397        }398      }399    }400    "Greater than matcher" - {401      "Every numeric double" - {402        "Should be greater than" - {403          "Numbers smaller than itself" {404            checkAll(100, nonMinNorMaxValueDoubles) {405              it shouldMatchGreaterThan it.slightlySmaller()406              it shouldMatchGreaterThan it.muchSmaller()407            }408          }409          "Negative infinity" {410            checkAll(100, nonMinNorMaxValueDoubles) {411              it shouldMatchGreaterThan NEGATIVE_INFINITY412            }413          }414        }415        "Should not be greater than" - {416          "Itself" {417            checkAll(100, nonMinNorMaxValueDoubles) {418              it shouldNotMatchGreaterThan it419            }420          }421          "Numbers greater than itself" {422            checkAll(100, nonMinNorMaxValueDoubles) {423              it shouldNotMatchGreaterThan it.slightlyGreater()424              it shouldNotMatchGreaterThan it.muchGreater()425            }426          }427          "NaN" {428            checkAll(100, nonMinNorMaxValueDoubles) {429              it shouldNotMatchGreaterThan NaN430            }431          }432          "Positive Infinity" {433            checkAll(100, nonMinNorMaxValueDoubles) {434              it shouldNotMatchGreaterThan POSITIVE_INFINITY435            }436          }437        }438      }439      "The non-numeric double" - {440        "NaN" - {441          "Should not be greater than" - {442            "Itself" {443              NaN shouldNotMatchGreaterThan NaN444            }445            "Any numeric double" {446              checkAll(100, numericDoubles) {447                NaN shouldNotMatchGreaterThan it448              }449            }450            "Positive Infinity" {451              NaN shouldNotMatchGreaterThan POSITIVE_INFINITY452            }453            "Negative Infinity" {454              NaN shouldNotMatchGreaterThan NEGATIVE_INFINITY455            }456          }457        }458      }459    }460    "Greater than or equal matcher" - {461      "Every numeric double" - {462        "Should be greater than or equal to" - {463          "Itself" {464            checkAll(100, nonMinNorMaxValueDoubles) {465              it shouldMatchGreaterThanOrEqual it466            }467          }468          "Numbers smaller than itself" {469            checkAll(100, nonMinNorMaxValueDoubles) {470              it shouldMatchGreaterThanOrEqual it.slightlySmaller()471              it shouldMatchGreaterThanOrEqual it.muchSmaller()472            }473          }474          "Negative Infinity" {475            checkAll(100, nonMinNorMaxValueDoubles) {476              it shouldMatchGreaterThanOrEqual NEGATIVE_INFINITY477            }478          }479        }480        "Should not be greater than or equal to" - {481          "Numbers bigger than itself" {482            checkAll(100, nonMinNorMaxValueDoubles) {483              it shouldNotMatchGreaterThanOrEqual it.slightlyGreater()484              it shouldNotMatchGreaterThanOrEqual it.muchGreater()485            }486          }487          "Positive Infinity" {488            checkAll(100, nonMinNorMaxValueDoubles) {489              it shouldNotMatchGreaterThanOrEqual POSITIVE_INFINITY490            }491          }492          "NaN" {493            checkAll(100, nonMinNorMaxValueDoubles) {494              it shouldNotMatchGreaterThanOrEqual NaN495            }496          }497        }498      }499      "The non-numeric double" - {500        "NaN" - {501          "Should not be greater than or equal to" - {502            "Itself" {503              NaN shouldNotMatchGreaterThanOrEqual NaN504            }505            "Any numeric double" {506              checkAll(100, numericDoubles) {507                NaN shouldNotMatchGreaterThanOrEqual it508              }509            }510            "Positive Infinity" {511              NaN shouldNotMatchGreaterThanOrEqual POSITIVE_INFINITY512            }513            "Negative Infinity" {514              NaN shouldNotMatchGreaterThanOrEqual NEGATIVE_INFINITY515            }516          }517        }518        "Positive Infinity" - {519          "Should be greater than or equal to" - {520            "Itself" {521              POSITIVE_INFINITY shouldMatchGreaterThanOrEqual POSITIVE_INFINITY522            }523            "Negative Infinity" {524              POSITIVE_INFINITY shouldMatchGreaterThanOrEqual NEGATIVE_INFINITY525            }526            "Any numeric double" {527              checkAll(100, numericDoubles) {528                POSITIVE_INFINITY shouldMatchGreaterThanOrEqual it529              }530            }531          }532          "Should not be greater than or equal to" - {533            "NaN" {534              POSITIVE_INFINITY shouldNotMatchGreaterThanOrEqual NaN535            }536          }537        }538        "Negative Infinity" - {539          "Should be greater than or equal to" - {540            "Itself" {541              NEGATIVE_INFINITY shouldMatchGreaterThanOrEqual NEGATIVE_INFINITY542            }543          }544          "Should not be greater than or equal to" - {545            "Any numeric double" {546              checkAll(100, numericDoubles) {547                NEGATIVE_INFINITY shouldNotMatchGreaterThanOrEqual it548              }549            }550            "Positive Infinity" {551              NEGATIVE_INFINITY shouldNotMatchGreaterThanOrEqual POSITIVE_INFINITY552            }553            "NaN" {554              NEGATIVE_INFINITY shouldNotMatchGreaterThanOrEqual NaN555            }556          }557        }558      }559    }560    "NaN matcher" - {561      "Every numeric double" - {562        "Should not be NaN" {563          checkAll(100, numericDoubles) {564            it.shouldNotMatchNaN()565          }566        }567      }568      "The non-numeric double" - {569        "NaN" - {570          "Should match NaN" {571            NaN.shouldMatchNaN()572          }573        }574        "Positive Infinity" - {575          "Should not match NaN" {576            POSITIVE_INFINITY.shouldNotMatchNaN()577          }578        }579        "Negative Infinity" - {580          "Should not match NaN" {581            NEGATIVE_INFINITY.shouldNotMatchNaN()582          }583        }584      }585    }586    "Positive Infinity matcher" - {587      "Any numeric double" - {588        "Should not match positive infinity" {589          checkAll(100, numericDoubles) {590            it.shouldNotMatchPositiveInfinity()591          }592        }593      }594      "The non-numeric double" - {595        "Positive Infinity" - {596          "Should match positive infinity" {597            POSITIVE_INFINITY.shouldMatchPositiveInfinity()598          }599        }600        "Negative Infinity" - {601          "Should not match positive infinity" {602            NEGATIVE_INFINITY.shouldNotMatchPositiveInfinity()603          }604        }605        "NaN" - {606          "Should not match positive infinity" {607            NaN.shouldNotMatchPositiveInfinity()608          }609        }610      }611    }612    "Negative Infinity matcher" - {613      "Any numeric double" - {614        "Should not match negative infinity" {615          checkAll(100, numericDoubles) {616            it.shouldNotMatchNegativeInfinity()617          }618        }619      }620      "The non-numeric double" - {621        "Negative Infinity" - {622          "Should match negative infinity" {623            NEGATIVE_INFINITY.shouldMatchNegativeInfinity()624          }625        }626        "Positive Infinity" - {627          "Should not match negative infinity" {628            POSITIVE_INFINITY.shouldNotMatchNegativeInfinity()629          }630        }631        "NaN" - {632          "Should not match negative infinity" {633            NaN.shouldNotMatchNegativeInfinity()634          }635        }636      }637    }638    "shouldBeZero" {639      (0.0).shouldBeZero()640      (-0.1).shouldNotBeZero()641      (0.1).shouldNotBeZero()642      MIN_VALUE.shouldNotBeZero()643      MAX_VALUE.shouldNotBeZero()644      NaN.shouldNotBeZero()645      POSITIVE_INFINITY.shouldNotBeZero()646      NEGATIVE_INFINITY.shouldNotBeZero()647    }648  }649  private fun shouldThrowAssertionError(message: String, vararg expression: () -> Any?) {650    expression.forEach {651      val exception = shouldThrow<AssertionError>(it)652      exception.message shouldBe message653    }654  }655  private fun Double.shouldMatchBetween(a: Double, b: Double, tolerance: Double) {656    this.shouldBeBetween(a, b, tolerance)657    this shouldBe between(a, b, tolerance)658    this.shouldThrowExceptionOnNotBetween(a, b, tolerance)659  }660  private fun Double.shouldNotMatchBetween(a: Double, b: Double, tolerance: Double) {...

matchers.kt

Source:matchers.kt

...52import io.kotest.matchers.ints.shouldBeLessThan53import io.kotest.matchers.ints.shouldBeLessThanOrEqual54import io.kotest.matchers.ints.shouldBeOdd55import io.kotest.matchers.ints.shouldBePositive56import io.kotest.matchers.ints.shouldBeZero57import io.kotest.matchers.iterator.shouldBeEmpty58import io.kotest.matchers.iterator.shouldHaveNext59import io.kotest.matchers.maps.shouldBeEmpty60import io.kotest.matchers.maps.shouldContain61import io.kotest.matchers.maps.shouldContainAll62import io.kotest.matchers.maps.shouldContainExactly63import io.kotest.matchers.maps.shouldContainKey64import io.kotest.matchers.nulls.shouldBeNull65import io.kotest.matchers.nulls.shouldNotBeNull66import io.kotest.matchers.shouldBe67import io.kotest.matchers.shouldNot68import io.kotest.matchers.shouldNotBe69import io.kotest.matchers.string.beEmpty70import io.kotest.matchers.string.shouldBeBlank71import io.kotest.matchers.string.shouldBeEmpty72import io.kotest.matchers.string.shouldBeEqualIgnoringCase73import io.kotest.matchers.string.shouldBeInteger74import io.kotest.matchers.string.shouldBeLowerCase75import io.kotest.matchers.string.shouldBeUpperCase76import io.kotest.matchers.string.shouldContain77import io.kotest.matchers.string.shouldContainADigit78import io.kotest.matchers.string.shouldContainIgnoringCase79import io.kotest.matchers.string.shouldContainOnlyDigits80import io.kotest.matchers.string.shouldContainOnlyOnce81import io.kotest.matchers.string.shouldEndWith82import io.kotest.matchers.string.shouldHaveLength83import io.kotest.matchers.string.shouldHaveLineCount84import io.kotest.matchers.string.shouldHaveMaxLength85import io.kotest.matchers.string.shouldHaveMinLength86import io.kotest.matchers.string.shouldHaveSameLengthAs87import io.kotest.matchers.string.shouldMatch88import io.kotest.matchers.string.shouldNotBeEmpty89import io.kotest.matchers.string.shouldStartWith90import io.kotest.matchers.throwable.shouldHaveCause91import io.kotest.matchers.throwable.shouldHaveCauseInstanceOf92import io.kotest.matchers.throwable.shouldHaveCauseOfType93import io.kotest.matchers.throwable.shouldHaveMessage94import io.kotest.matchers.types.shouldBeInstanceOf95import io.kotest.matchers.types.shouldBeSameInstanceAs96import io.kotest.matchers.types.shouldBeTypeOf97import io.kotest.matchers.uri.shouldHaveHost98import io.kotest.matchers.uri.shouldHavePort99import io.kotest.matchers.uri.shouldHaveScheme100import java.io.File101import java.net.URI102import java.time.LocalDate103import java.time.LocalTime104// https://kotest.io/docs/assertions/core-matchers.html105class MatchersTest : DescribeSpec({106    describe("general") {107        it("basics") {108            (1 == 1).shouldBeTrue()109            (2 + 2) shouldBe 4110            val foo: Any = "foobar"111            foo.shouldBeTypeOf<String>() shouldContain "fo"112            "".shouldBeEmpty()113            "x".shouldNot(beEmpty()) // manually negate114            "x".shouldNotBeEmpty() // reusable115            URI("https://tba") shouldHaveHost "tba"116            URI("https://tba:81") shouldHavePort 81117            URI("https://tba") shouldHaveScheme "https"118            File("/").apply {119                shouldExist()120                shouldBeADirectory()121                shouldBeAbsolute()122                shouldNotBeEmpty()123            }124            // executable, hidden, readable, smaller, writeable, containFile, extension, path, ...125            LocalDate.now().shouldBeToday()126            // before/after, within, same, between, have year/month/day/hour/...127            LocalTime.now().shouldHaveSameHoursAs(LocalTime.now())128            // before/after/between, sameMinute/Seconds/Nanos129        }130        it("numbers") {131            1 shouldBeLessThan 2132            1 shouldBeLessThanOrEqual 1 // Int-based; returns this133            1 shouldBeLessThanOrEqualTo 1 // Comparble-based; void134            1 shouldBeEqualComparingTo 1 // Comparable-based135            1.shouldBeBetween(0, 2)136            1 shouldBeInRange 0..2137            0.shouldBeZero()138            1.shouldBePositive()139            1.shouldBeOdd()140            (1.2).shouldBe(1.20001.plusOrMinus(Percentage(20.0)))141            (1.2).shouldNotBeNaN()142        }143        it("strings") {144            // generic: "abc" shouldBe "abc"145            "aBc" shouldBeEqualIgnoringCase "abc"146            "".shouldBeEmpty()147            " ".shouldBeBlank() // empty or whitespace148            "abc" shouldContain ("b")149            "aBc" shouldContainIgnoringCase "bc"150            "x-a-x" shouldContain """\-[a-z]\-""".toRegex()151            "-a-" shouldMatch """\-[a-z]\-""".toRegex()...

FrequencyIntervalTest.kt

Source:FrequencyIntervalTest.kt

1package net.paploo.kmusical.core2import io.kotest.assertions.throwables.shouldThrowAny3import io.kotest.core.spec.style.DescribeSpec4import io.kotest.matchers.doubles.ToleranceMatcher5import io.kotest.matchers.doubles.plusOrMinus6import io.kotest.matchers.should7import io.kotest.matchers.shouldBe8import io.kotest.matchers.types.beInstanceOf9import io.kotest.property.Arb10import io.kotest.property.arbitrary.arbitrary11import io.kotest.property.arbitrary.pair12import io.kotest.property.arbitrary.triple13import io.kotest.property.checkAll14import net.paploo.kmusical.testutil.plusOrMinus15import kotlin.math.absoluteValue16class FrequencyRatioTest : DescribeSpec({17    val frequencyRatioGen = arbitrary { rs ->18        FrequencyRatio(rs.random.nextDouble().absoluteValue)19    }20    describe("instantiation") {21        it("should not allow negative values") {22            shouldThrowAny { Frequency(-0.5) }23            shouldThrowAny { Frequency(-2.0) }24        }25        it("should not instantiate with a zero frequency") {26            shouldThrowAny { Frequency(0.0) }27        }28    }29    describe("plus") {30        it("The result should be typed as a frequency ratio") {31            val a = FrequencyRatio(1.5)32            val r: FrequencyRatio = a + a // Won't compile if typed wrong.33            r should beInstanceOf(FrequencyRatio::class)34        }35        it("should be the product of the value in hertz") {36            Arb.pair(frequencyRatioGen, frequencyRatioGen).checkAll { (a, b) ->37                val r = a + b38                r.value shouldBe (a.value * b.value).plusOrMinus()39            }40        }41        describe("it should be monoidal") {42            it("should be associative") {43                Arb.triple(frequencyRatioGen, frequencyRatioGen, frequencyRatioGen).checkAll { (a, b, c) ->44                    val left = (a + b) + c45                    val right = a + (b + c)46                    left.value shouldBe (right.value.plusOrMinus())47                }48            }49            it("should have left identity") {50                frequencyRatioGen.checkAll {51                    it + FrequencyRatio.unison shouldBe it52                }53            }54            it("should have right identity") {55                frequencyRatioGen.checkAll {56                    FrequencyRatio.unison + it shouldBe it57                }58            }59        }60    }61    describe("minus") {62        it("The result should be typed as a frequency ratio") {63            val a = FrequencyRatio(1.5)64            val r: FrequencyRatio = a - a // Won't compile if typed wrong.65            r should beInstanceOf(FrequencyRatio::class)66        }67        it("should be the div of the value in hertz") {68            Arb.pair(frequencyRatioGen, frequencyRatioGen).checkAll { (a,b) ->69                val r = a - b70                r.value shouldBe (a.value / b.value).plusOrMinus()71            }72        }73    }74    describe("unaryMinus") {75        it("should be the additive inverse") {76            frequencyRatioGen.checkAll {77                (it + (-it)).value shouldBe ((FrequencyRatio.unison).value.plusOrMinus())78            }79        }80    }81    describe("toCents") {82        it("should convert unison constant") {83            FrequencyRatio.unison.toCents() shouldBe Cent.unison84        }85        it("should convert octave constant") {86            FrequencyRatio.octave.toCents() shouldBe Cent.octave87        }88        it("should convert a just fifth to the nearest whole cent value") {89            FrequencyRatio(3.0 / 2.0).toCents() shouldBe Cent(702)90        }91        it("should convert a value down by one fourth to the nearest whole cent value") {92            FrequencyRatio(3.0/4.0).toCents() shouldBe Cent(-498)93        }94    }95    describe("toFrequencyRatio") {96        it("should return the same value") {97            frequencyRatioGen.checkAll {98                it.toFrequencyRatio() shouldBe it99            }100        }101    }102})103class CentTest : DescribeSpec({104    val centGen = arbitrary { rs ->105        Cent(rs.random.nextInt(-12000,12000).absoluteValue)106    }107    describe("plus") {108        it("The result should be typed as a cent") {109            val a = Cent(702)110            val r: Cent = a + a // Won't compile if typed wrong.111            r should beInstanceOf(Cent::class)112        }113        it("should be the sum of the raw value") {114            Arb.pair(centGen, centGen).checkAll { (a,b) ->115                val r = a + b116                r.value shouldBe a.value + b.value117            }118        }119        describe("it should be monoidal") {120            it("should be associative") {121                Arb.triple(centGen, centGen, centGen).checkAll { (a, b, c) ->122                    val left = (a + b) + c123                    val right = a + (b + c)124                    left shouldBe right125                }126            }127            it("should have left identity") {128                centGen.checkAll {129                    it + Cent.unison shouldBe it130                }131            }132            it("should have right identity") {133                centGen.checkAll {134                    Cent.unison + it shouldBe it135                }136            }137        }138    }139    describe("minus") {140        it("The result should be typed as a cent") {141            val a = Cent(702)142            val r: Cent = a - a // Won't compile if typed wrong.143            r should beInstanceOf(Cent::class)144        }145        it("should be the difference of the raw value") {146            Arb.pair(centGen, centGen).checkAll { (a,b) ->147                val r = a - b148                r.value shouldBe (a.value - b.value)149            }150        }151    }152    describe("unaryMinus") {153        it("should be the additive inverse") {154            centGen.checkAll {155                (it + (-it)) shouldBe Cent.unison156            }157        }158    }159    describe("toCents") {160        it("should return the same value") {161            centGen.checkAll {162                it.toCents() shouldBe it163            }164        }165    }166    describe("toFrequencyRatio") {167        it("should convert unison constant") {168            Cent.unison.toFrequencyRatio() shouldBe FrequencyRatio.unison169        }170        it("should convert octave constant") {171            Cent.octave.toFrequencyRatio() shouldBe FrequencyRatio.octave172        }173        //This is not very tight, since we only keep precision to one cent for cents.174        val tolerance = 1e-4175        it("should convert a just fifth (within rounding error)") {176            val converted = Cent(702).toFrequencyRatio()177            val expected = FrequencyRatio(1.5)178            converted.value shouldBe expected.value.plusOrMinus(tolerance)179        }180        it("should convert a value down by one fourth (within rounding error)") {181            val converted = Cent(-498).toFrequencyRatio()182            val expected = FrequencyRatio(3.0/4.0)183            converted.value shouldBe expected.value.plusOrMinus(tolerance)184        }185    }186})...

TestMapping.kt

Source:TestMapping.kt

1package org.openrndr.math2import kotlin.math.absoluteValue3import io.kotest.matchers.doubles.between4import io.kotest.matchers.doubles.plusOrMinus5import io.kotest.matchers.shouldBe6import io.kotest.matchers.shouldNotBe7import org.openrndr.math.test.it8import org.openrndr.math.test.it as describe9import kotlin.test.Test10class TestMapping {11    @Test12    fun shouldDoMappingOperations() {13        describe("Mapping Double from zero-width before domain to non-zero-width after domain") {14            it("should not produce NaN results") {15                map(0.0, 0.0, 0.0, 1.0, 0.0) shouldBe (0.0 plusOrMinus 10E-6)16                map(0.0, 0.0, 0.0, 1.0, 1.0) shouldBe (1.0 plusOrMinus 10E-6)17            }18        }19        describe("Mapping Double from zero-width before domain to zero-width after domain") {20            it("should not produce NaN results") {21                map(0.0, 0.0, 0.0, 0.0, 0.0) shouldBe (0.0 plusOrMinus 10E-6)22                map(0.0, 0.0, 0.0, 0.0, 1.0) shouldBe (0.0 plusOrMinus 10E-6)23            }24        }25        describe("Mapping Double") {26            val beforeLeft = 0.027            val beforeRight = 1.028            val beforeVal = beforeRight * 2.0 // out of range29            val afterLeft = 0.030            val afterRight = beforeRight * 2.031            it("should not clamp") {32                map(33                    beforeLeft, beforeRight, afterLeft, afterRight, beforeVal34                ) shouldNotBe between(afterLeft, afterRight, 0.0)35            }36            it("should clamp") {37                map(38                    beforeLeft, beforeRight, afterLeft, afterRight, beforeVal, true39                ) shouldBe between(afterLeft, afterRight, 0.0)40            }41            it("should not clamp") {42                beforeVal.map(43                    beforeLeft, beforeRight, afterLeft, afterRight44                ) shouldNotBe between(afterLeft, afterRight, 0.0)45            }46            it("should clamp") {47                beforeVal.map(48                    beforeLeft, beforeRight, afterLeft, afterRight, true49                ) shouldBe between(afterLeft, afterRight, 0.0)50            }51        }52        describe("Mapping Vector2") {53            val beforeLeft = Vector2.ZERO54            val beforeRight = Vector2.ONE55            val beforeVal = beforeRight * 2.0 // out of range56            val afterLeft = Vector2.ZERO57            val afterRight = beforeRight * 2.058            it("should not clamp") {59                val mapped = beforeVal.map(beforeLeft, beforeRight,60                    afterLeft, afterRight)61                for (i in 0 until 2)62                    mapped[i] shouldNotBe between(afterLeft[i], afterRight[i], 0.0)63            }64            it("should clamp") {65                val mapped = beforeVal.map(beforeLeft, beforeRight,66                    afterLeft, afterRight, true)67                for (i in 0 until 2)68                    mapped[i] shouldBe between(afterLeft[i], afterRight[i], 0.0)69            }70        }71        describe("Mapping Vector3") {72            val beforeLeft = Vector3.ZERO73            val beforeRight = Vector3.ONE74            val beforeVal = beforeRight * 2.0 // out of range75            val afterLeft = Vector3.ZERO76            val afterRight = beforeRight * 2.077            it("should not clamp") {78                val mapped = beforeVal.map(beforeLeft, beforeRight,79                    afterLeft, afterRight)80                for (i in 0 until 3)81                    mapped[i] shouldNotBe between(afterLeft[i], afterRight[i], 0.0)82            }83            it("should clamp") {84                val mapped = beforeVal.map(beforeLeft, beforeRight,85                    afterLeft, afterRight, true)86                for (i in 0 until 3)87                    mapped[i] shouldBe between(afterLeft[i], afterRight[i], 0.0)88            }89        }90        describe("Mapping Vector4") {91            val beforeLeft = Vector4.ZERO92            val beforeRight = Vector4.ONE93            val beforeVal = beforeRight * 2.0 // out of range94            val afterLeft = Vector4.ZERO95            val afterRight = beforeRight * 2.096            it("should not clamp") {97                val mapped = beforeVal.map(beforeLeft, beforeRight,98                    afterLeft, afterRight)99                for (i in 0 until 4)100                    mapped[i] shouldNotBe between(afterLeft[i], afterRight[i], 0.0)101            }102            it("should clamp") {103                val mapped = beforeVal.map(beforeLeft, beforeRight,104                    afterLeft, afterRight, true)105                for (i in 0 until 4)106                    mapped[i] shouldBe between(afterLeft[i], afterRight[i], 0.0)107            }108        }109    }110    @Test111    fun shouldDoMixingOperations() {112        describe("Mixing double") {113            it("should produce expected result") {114                mix(1.0, 3.0, 0.5) shouldBe (2.0 plusOrMinus 10E-6)115                mix(3.0, 1.0, 0.5) shouldBe (2.0 plusOrMinus 10E-6)116            }117        }118        describe("Mixing angles") {119            it("should interpolate via shortest side") {120                mixAngle(5.0, 355.0, 0.5) shouldBe (0.0 plusOrMinus  10E-6)121                mixAngle(355.0, 5.0, 0.5) shouldBe (0.0 plusOrMinus  10E-6)122                mixAngle(-100.0, 100.0, 0.5).absoluteValue shouldBe (180.0 plusOrMinus  10E-6)123                mixAngle(100.0, -100.0, 0.5).absoluteValue shouldBe (180.0 plusOrMinus  10E-6)124            }125        }126    }127}...

TestQuaternion.kt

Source:TestQuaternion.kt

1package org.openrndr.math2import io.kotest.matchers.doubles.between3import io.kotest.matchers.shouldBe4import io.kotest.matchers.string.shouldMatch5import kotlinx.serialization.encodeToString6import kotlinx.serialization.json.Json7import org.openrndr.math.test.it8import kotlin.test.Test9class TestQuaternion {10    @Test11    fun shouldDoOperationsOnAQuaternion() {12        it("IDENTITY times IDENTITY should result in IDENTITY") {13            val q0 = Quaternion.IDENTITY14            val q1 = Quaternion.IDENTITY15            val qm = q0 * q116            qm.x shouldBe 0.017            qm.y shouldBe 0.018            qm.z shouldBe 0.019            qm.w shouldBe 1.020        }21        it ("matrix to quaternion to matrix") {22            val q0 = Quaternion.fromMatrix(Matrix33.IDENTITY)23            val m0 = q0.matrix24            m0 shouldBe Matrix33.IDENTITY25        }26        it ("quaternion look +Z") {27            val q0 = Quaternion.fromLookAt(Vector3.ZERO, Vector3(0.0, 0.0, 1.0), Vector3.UNIT_Y)28            val v0 = q0 * Vector3.UNIT_Z29            v0.x shouldBe between(-0.0001, 0.0001, 0.0)30            v0.y shouldBe between(-0.0001, 0.0001, 0.0)31            v0.z shouldBe between(1-0.0001, 1+0.0001, 0.0)32        }33        it ("quaternion look -Z") {34            val q0 = Quaternion.fromLookAt(Vector3.ZERO, Vector3(0.0, 0.0, -1.0), Vector3.UNIT_Y)35            val v0 = q0 * Vector3.UNIT_Z36            v0.x shouldBe between(-0.0001, 0.0001, 0.0)37            v0.y shouldBe between(-0.0001, 0.0001, 0.0)38            v0.z shouldBe between(-1-0.0001, -1+0.0001, 0.0)39        }40        it ("quaternion look +X") {41            val q0 = Quaternion.fromLookAt(Vector3.ZERO, Vector3(1.0, 0.0, 0.0), Vector3.UNIT_Y)42            val v0 = q0 * Vector3.UNIT_Z43            v0.x shouldBe between(1-0.0001, 1+0.0001, 0.0)44            v0.y shouldBe between(-0.0001, 0.0001, 0.0)45            v0.z shouldBe between(-0.0001, 0.0001, 0.0)46        }47        it ("quaternion look -X") {48            val q0 = Quaternion.fromLookAt(Vector3.ZERO, Vector3(-1.0, 0.0, 0.0), Vector3.UNIT_Y)49            val v0 = q0 * Vector3.UNIT_Z50            v0.x shouldBe between(-1-0.0001, -1+0.0001, 0.0)51            v0.y shouldBe between(-0.0001, 0.0001, 0.0)52            v0.z shouldBe between(-0.0001, 0.0001, 0.0)53        }54        it("quaternion.identity * vector3") {55            Quaternion.IDENTITY * Vector3.UNIT_X shouldBe Vector3.UNIT_X56            Quaternion.IDENTITY * Vector3.UNIT_Y shouldBe Vector3.UNIT_Y57            Quaternion.IDENTITY * Vector3.UNIT_Z shouldBe Vector3.UNIT_Z58        }59    }60    @Test61    fun shouldSerialize() {62        it("should serialize ZERO to JSON") {63            Json.encodeToString(Quaternion.ZERO) shouldMatch """\{"x":0(\.0)?,"y":0(\.0)?,"z":0(\.0)?,"w":0(\.0)?\}"""64        }65        it("should serialize IDENTITY to JSON") {66            Json.encodeToString(Quaternion.IDENTITY) shouldMatch """\{"x":0(\.0)?,"y":0(\.0)?,"z":0(\.0)?,"w":1(\.0)?\}"""67        }68    }69}...

AbstractGeneratorTest.kt

Source:AbstractGeneratorTest.kt

...22    fun size() {23        samples.size shouldBe numberOfSamples24    }25    @Test26    fun betweenZeroAndOne() {27        for (p in samples) {28            p.x shouldBeGreaterThanOrEqual 0.029            p.x shouldBeLessThan 1.030            p.y shouldBeGreaterThanOrEqual 0.031            p.y shouldBeLessThan 1.032        }33    }34    @Test35    fun distribution() {36        val histX = Histogram()37        val histY = Histogram()38        val histXY = Histogram()39        for (p in samples) {40            val x = (p.x * factorX).toInt()...

BmiForCmKgTest.kt

Source:BmiForCmKgTest.kt

...6    test("Bmi should be calculated correctly") {7        BmiForCmKg(68.0, 182.0).count() shouldBe(20.52 plusOrMinus 0.01)8        BmiForCmKg(52.0, 163.0).count() shouldBe(19.57 plusOrMinus 0.01)9    }10    test("Zero height should return BMI equal to zero") {11        BmiForCmKg(68.0, 0.0).count() shouldBe 012    }13})...

BmiForInLbTest.kt

Source:BmiForInLbTest.kt

...6    test("Bmi should be calculated correctly") {7        BmiForInLb(68.0, 182.0).count() shouldBe(1.44 plusOrMinus 0.01)8        BmiForInLb(52.0, 163.0).count() shouldBe(1.37 plusOrMinus 0.01)9    }10    test("Zero height should return BMI equal to zero") {11        BmiForInLb(68.0, 0.0).count() shouldBe 012    }13})...

Zero

Using AI Code Generation

1import io.kotest.matchers.doubles.*2import io.kotest.matchers.longs.*3import io.kotest.matchers.ints.*4import io.kotest.matchers.shorts.*5import io.kotest.matchers.bytes.*6import io.kotest.matchers.chars.*7import io.kotest.matchers.booleans.*8import io.kotest.matchers.floats.*9import io.kotest.matchers.ints.*10import io.kotest.matchers.shorts.*11import io.kotest.matchers.bytes.*12import io.kotest.matchers.chars.*13import io.kotest.matchers.booleans.*14import io.kotest.matchers.floats.*15import io.kotest.matchers.ints.*16import io.kotest.matchers.shorts.*17import io.kotest.matchers.bytes.*18import io.kotest.matchers.chars.*19import io.kotest.matchers.booleans.*

Zero

Using AI Code Generation

1    import io.kotest.matchers.doubles.plusOrMinus2    import io.kotest.matchers.shouldBe3    import io.kotest.matchers.longs.plusOrMinus4    import io.kotest.matchers.shouldBe5    import io.kotest.matchers.shorts.plusOrMinus6    import io.kotest.matchers.shouldBe7    import io.kotest.matchers.bytes.plusOrMinus8    import io.kotest.matchers.shouldBe9    import io.kotest.matchers.floats.plusOrMinus10    import io.kotest.matchers.shouldBe11    import io.kotest.matchers.ints.plusOrMinus12    import io.kotest.matchers.shouldBe13    import io.kotest.matchers.longs.plusOrMinus14    import io.kotest.matchers.shouldBe15    import io.kotest.matchers.shorts.plusOrMinus16    import io.kotest.matchers.shouldBe17    import io.kotest.matchers.bytes.plusOrMinus18    import io.kotest.matchers.shouldBe19    import io.kotest.matchers.floats.plusOrMinus20    import io.kotest.matchers.shouldBe21    import io.kotest.matchers.ints.plusOrMinus22    import io.kotest.matchers.shouldBe23    import io.kotest.matchers.longs.plusOrMinus24    import io.kotest.matchers.shouldBe

Zero

Using AI Code Generation

1    import io.kotest.matchers.doubles.plusOrMinus2    import io.kotest.matchers.shouldBe3    import org.junit.jupiter.api.Assertions.assertEquals4    class MyTest {5      fun `should compare doubles`() {6        assertEquals(0.1, 0.1, 0.000001)7      }8    }9    java.lang.NoSuchMethodError: 'void org.junit.jupiter.api.Assertions.assertEquals(double, double, double)'10    dependencies {11    }

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