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How to use containOnlyOnce method of io.kotest.matchers.string.matchers class

Best Kotest code snippet using io.kotest.matchers.string.matchers.containOnlyOnce

StringMatchersTest.kt

Source:StringMatchersTest.kt

...11import io.kotest.matchers.string.contain12import io.kotest.matchers.string.containADigit13import io.kotest.matchers.string.containIgnoringCase14import io.kotest.matchers.string.containOnlyDigits15import io.kotest.matchers.string.containOnlyOnce16import io.kotest.matchers.string.containOnlyWhitespace17import io.kotest.matchers.string.endWith18import io.kotest.matchers.string.haveSameLengthAs19import io.kotest.matchers.string.match20import io.kotest.matchers.string.shouldBeBlank21import io.kotest.matchers.string.shouldBeEmpty22import io.kotest.matchers.string.shouldBeEqualIgnoringCase23import io.kotest.matchers.string.shouldBeInteger24import io.kotest.matchers.string.shouldBeSingleLine25import io.kotest.matchers.string.shouldContain26import io.kotest.matchers.string.shouldContainADigit27import io.kotest.matchers.string.shouldContainIgnoringCase28import io.kotest.matchers.string.shouldContainOnlyDigits29import io.kotest.matchers.string.shouldContainOnlyOnce30import io.kotest.matchers.string.shouldEndWith31import io.kotest.matchers.string.shouldHaveLengthBetween32import io.kotest.matchers.string.shouldHaveLengthIn33import io.kotest.matchers.string.shouldHaveSameLengthAs34import io.kotest.matchers.string.shouldMatch35import io.kotest.matchers.string.shouldNotBeBlank36import io.kotest.matchers.string.shouldNotBeEmpty37import io.kotest.matchers.string.shouldNotBeEqualIgnoringCase38import io.kotest.matchers.string.shouldNotBeSingleLine39import io.kotest.matchers.string.shouldNotContain40import io.kotest.matchers.string.shouldNotContainADigit41import io.kotest.matchers.string.shouldNotContainIgnoringCase42import io.kotest.matchers.string.shouldNotContainOnlyDigits43import io.kotest.matchers.string.shouldNotContainOnlyOnce44import io.kotest.matchers.string.shouldNotEndWith45import io.kotest.matchers.string.shouldNotHaveLengthBetween46import io.kotest.matchers.string.shouldNotHaveLengthIn47import io.kotest.matchers.string.shouldNotHaveSameLengthAs48import io.kotest.matchers.string.shouldNotMatch49class StringMatchersTest : FreeSpec() {50   init {51      "string shouldBe other" - {52         "should support null arguments" {53            val a: String? = "a"54            val b: String? = "a"55            a shouldBe b56         }57         "should report when only line endings differ" {58            forAll(59               row("a\nb", "a\r\nb"),60               row("a\nb\nc", "a\nb\r\nc"),61               row("a\r\nb", "a\nb"),62               row("a\nb", "a\rb"),63               row("a\rb", "a\r\nb")64            ) { expected, actual ->65               shouldThrow<AssertionError> {66                  actual shouldBe expected67               }.let {68                  it.message shouldContain "contents match, but line-breaks differ"69               }70            }71         }72         "should show diff when newline count differs" {73            shouldThrow<AssertionError> {74               "a\nb" shouldBe "a\n\nb"75            }.message shouldBe """76               |(contents match, but line-breaks differ; output has been escaped to show line-breaks)77               |expected:<a\n\nb> but was:<a\nb>78               """.trimMargin()79         }80      }81      "contain only once" {82         "la tour" should containOnlyOnce("tour")83         "la tour tour" shouldNot containOnlyOnce("tour")84         "la tour tour" shouldNotContainOnlyOnce "tour"85         shouldThrow<AssertionError> {86            "la" should containOnlyOnce("tour")87         }.message shouldBe """"la" should contain the substring "tour" exactly once"""88         shouldThrow<AssertionError> {89            null shouldNot containOnlyOnce("tour")90         }.message shouldBe "Expecting actual not to be null"91         shouldThrow<AssertionError> {92            null shouldNotContainOnlyOnce "tour"93         }.message shouldBe "Expecting actual not to be null"94         shouldThrow<AssertionError> {95            null should containOnlyOnce("tour")96         }.message shouldBe "Expecting actual not to be null"97         shouldThrow<AssertionError> {98            null shouldContainOnlyOnce "tour"99         }.message shouldBe "Expecting actual not to be null"100      }101      "contain(regex)" {102         "la tour" should contain("^.*?tour$".toRegex())103         "la tour" shouldNot contain(".*?abc.*?".toRegex())104         "la tour" shouldContain "^.*?tour$".toRegex()105         "la tour" shouldNotContain ".*?abc.*?".toRegex()106         shouldThrow<AssertionError> {107            "la tour" shouldContain ".*?abc.*?".toRegex()108         }.message shouldBe "\"la tour\" should contain regex .*?abc.*?"109         shouldThrow<AssertionError> {...

matchers.kt

Source:matchers.kt

...25    value.toCharArray().any { it in '0'..'9' },26    "${value.show().value} should contain at least one digit",27    "${value.show().value} should not contain any digits")28}29infix fun String?.shouldContainOnlyOnce(substr: String) = this should containOnlyOnce(substr)30infix fun String?.shouldNotContainOnlyOnce(substr: String) = this shouldNot containOnlyOnce(substr)31fun containOnlyOnce(substring: String) = neverNullMatcher<String> { value ->32  MatcherResult(33    value.indexOf(substring) >= 0 && value.indexOf(substring) == value.lastIndexOf(substring),34    "${value.show().value} should contain the substring ${substring.show().value} exactly once",35    "${value.show().value} should not contain the substring ${substring.show().value} exactly once"36  )37}38fun String?.shouldBeLowerCase() = this should beLowerCase()39fun String?.shouldNotBeLowerCase() = this shouldNot beLowerCase()40fun beLowerCase() = neverNullMatcher<String> { value ->41  MatcherResult(42    value.toLowerCase() == value,43    "${value.show().value} should be lower case",44    "${value.show().value} should not should be lower case")45}...

containOnlyOnce

Using AI Code Generation

1str should containOnlyOnce("Hello")2str should containOnlyOnce("World")3str should containOnlyOnce("Hello World")4str shouldNot containOnlyOnce("Hello World")5str shouldNot containOnlyOnce("Hello")6str shouldNot containOnlyOnce("World")7str should containsAnyOf("Hello", "World")8str should containsAnyOf("Hello", "World", "Hello World")9str shouldNot containsAnyOf("Hello", "World", "Hello World")10str shouldNot containsAnyOf("Hello")11str shouldNot containsAnyOf("World")12str shouldNot containsAnyOf("Hello World")13str should containsNoneOf("Hello", "World")14str shouldNot containsNoneOf("Hello", "World", "Hello World")15str shouldNot containsNoneOf("Hello")16str shouldNot containsNoneOf("World")17str shouldNot containsNoneOf("Hello World")18str should containAtLeastOnce("Hello")19str should containAtLeastOnce("World")20str should containAtLeastOnce("Hello World")21str shouldNot containAtLeastOnce("Hello World")22str shouldNot containAtLeastOnce("Hello")23str shouldNot containAtLeastOnce("World")24str should containAtMostOnce("Hello")25str should containAtMostOnce("World")26str should containAtMostOnce("Hello World")27str shouldNot containAtMostOnce("Hello World")28str shouldNot containAtMostOnce("Hello")29str shouldNot containAtMostOnce("World")30str should containAtLeast(3, "Hello")31str should containAtLeast(3, "World")32str should containAtLeast(3, "Hello World")33str shouldNot containAtLeast(3, "Hello World")34str shouldNot containAtLeast(3, "Hello")

containOnlyOnce

Using AI Code Generation

1    .containOnlyOnce("kotest")2    .containOnlyOnce("matchers")3    .containOnlyOnce("string")4    .containOnlyOnce("io")5    .containOnlyOnce("kotest")6  .containOnlyOnce("kotest")7  .containOnlyOnce("matchers")8  .containOnlyOnce("string")9  .containOnlyOnce("io")10  .containOnlyOnce("kotest")11.containOnlyOnce("kotest")12.containOnlyOnce("matchers")13.containOnlyOnce("string")14.containOnlyOnce("io")15.containOnlyOnce("kotest")16.containOnlyOnce("kotest")17.containOnlyOnce("matchers")18.containOnlyOnce("string")19.containOnlyOnce("io")20.containOnlyOnce("kotest")21.containOnlyOnce("kotest")22.containOnlyOnce("matchers")23.containOnlyOnce("string")24.containOnlyOnce("io")25.containOnlyOnce("kotest")26.containOnlyOnce("kotest")27.containOnlyOnce("matchers")28.containOnlyOnce("string")29.containOnlyOnce("io")30.containOnlyOnce("kotest")31.containOnlyOnce("kotest")32.containOnlyOnce("matchers")33.containOnlyOnce("string")34.containOnlyOnce("io")35.containOnlyOnce("kotest")36.containOnlyOnce("kotest")37.containOnlyOnce("matchers")38.containOnlyOnce("string")39.containOnlyOnce("io")40.containOnlyOnce("kotest")41.containOnlyOnce("kot

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