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How to use beInstanceOf method of io.kotest.matchers.types.TypeMatchers class

Best Kotest code snippet using io.kotest.matchers.types.TypeMatchers.beInstanceOf

TypeMatchersTest.kt

Source:TypeMatchersTest.kt

1package com.sksamuel.kotest.matchers.types2import io.kotest.assertions.throwables.shouldThrow3import io.kotest.core.spec.style.WordSpec4import io.kotest.matchers.collections.shouldHaveSize5import io.kotest.matchers.types.beInstanceOf6import io.kotest.matchers.types.beOfType7import io.kotest.matchers.types.beTheSameInstanceAs8import io.kotest.matchers.nulls.beNull9import io.kotest.matchers.nulls.shouldBeNull10import io.kotest.matchers.should11import io.kotest.matchers.shouldBe12import io.kotest.matchers.shouldNot13import io.kotest.matchers.types.haveAnnotation14import io.kotest.matchers.types.instanceOf15import io.kotest.matchers.types.shouldBeInstanceOf16import io.kotest.matchers.types.shouldBeSameInstanceAs17import io.kotest.matchers.types.shouldBeTypeOf18import io.kotest.matchers.types.shouldHaveAnnotation19import io.kotest.matchers.types.shouldNotBeInstanceOf20import io.kotest.matchers.types.shouldNotBeTypeOf21import java.util.ArrayList22import java.util.LinkedList23@Suppress("UnnecessaryVariable")24class TypeMatchersTest : WordSpec() {25  @Retention(AnnotationRetention.RUNTIME)26  annotation class Vod27  @Vod28  class Wibble29  init {30     "typeOf" should {31        "test for exact type" {32           val arrayList: List<Int> = arrayListOf(1, 2, 3)33           arrayList.shouldBeTypeOf<ArrayList<*>>()34           arrayList.shouldNotBeTypeOf<List<*>>()35        }36     }37    "haveAnnotation(annotation)" should {38      "test for the presence of an annotation" {39        Wibble::class.java should haveAnnotation(Vod::class.java)40        Wibble::class.java.shouldHaveAnnotation(Vod::class.java)41      }42    }43    "beInstanceOf" should {44       "test that value is assignable to class" {45          val arrayList: List<Int> = arrayListOf(1, 2, 3)46          arrayList should beInstanceOf(ArrayList::class)47          arrayList should beInstanceOf<ArrayList<*>>()48          arrayList should instanceOf(ArrayList::class)49          arrayList should instanceOf<ArrayList<*>>()50          arrayList.shouldBeInstanceOf<ArrayList<*>>()51          arrayList should beInstanceOf(List::class)52          arrayList should beInstanceOf<List<*>>()53          arrayList should instanceOf(List::class)54          arrayList should instanceOf<List<*>>()55          arrayList.shouldBeInstanceOf<List<*>>()56          shouldThrow<AssertionError> { arrayList should beInstanceOf(LinkedList::class) }57          shouldThrow<AssertionError> { arrayList should beInstanceOf(LinkedList::class) }58          shouldThrow<AssertionError> { arrayList should beInstanceOf<LinkedList<*>>() }59          shouldThrow<AssertionError> { arrayList should instanceOf(LinkedList::class) }60          shouldThrow<AssertionError> { arrayList should instanceOf<LinkedList<*>>() }61          shouldThrow<AssertionError> { arrayList.shouldBeInstanceOf<LinkedList<*>>() }62          arrayList.shouldNotBeInstanceOf<LinkedList<*>>()63          shouldThrow<AssertionError> { arrayList.shouldNotBeInstanceOf<ArrayList<*>>() }64       }65       "use smart contracts to cast" {66          val list: Collection<Int> = arrayListOf(1, 2, 3)67          list.shouldBeInstanceOf<ArrayList<Int>>()68          list.add(4) // this will only work if smart contracts worked69       }70       "return the receiver" {71          val list: Collection<Int> = arrayListOf(1, 2, 3)72          list.shouldBeInstanceOf<ArrayList<Int>>()73             .shouldHaveSize(3)74       }75       "Allow execution with a lambda" {76          val list = arrayListOf(1, 2, 3)77          list.shouldBeInstanceOf<ArrayList<Int>> {78             it shouldBeSameInstanceAs list79          }80       }81      "Returns typecasted value when invoked with a lambda" {82        val list = arrayListOf(1, 2, 3)83        val typecastedList = list.shouldBeInstanceOf<ArrayList<Int>> {}84        typecastedList shouldBeSameInstanceAs list85      }86      "accepts null values" {87        val arrayList: List<Int>? = null88        shouldThrow<AssertionError> { arrayList should beInstanceOf(ArrayList::class) }89        shouldThrow<AssertionError> { arrayList.shouldBeInstanceOf<ArrayList<*>>() }90        shouldThrow<AssertionError> { arrayList shouldNot beInstanceOf(List::class) }91        shouldThrow<AssertionError> { arrayList.shouldNotBeInstanceOf<LinkedList<*>>() }92      }93    }94    "beOfType" should {95      "test that value have exactly the same type" {96        val arrayList: List<Int> = arrayListOf(1, 2, 3)97        arrayList should beOfType<ArrayList<Int>>()98        shouldThrow<AssertionError> {99          arrayList should beOfType<LinkedList<Int>>()100        }101        shouldThrow<AssertionError> {102          arrayList should beOfType<List<Int>>()103        }104      }...

beInstanceOf

Using AI Code Generation

1import io.kotest.matchers.types.beInstanceOf2result should beInstanceOf<Int>()3import io.kotest.matchers.nulls.beNull4result should beNull()5import io.kotest.matchers.nulls.beNotNull6result should beNotNull()7import io.kotest.matchers.booleans.beTrue8result should beTrue()9import io.kotest.matchers.booleans.beFalse10result should beFalse()11import io.kotest.matchers.collections.beEmpty12val result = listOf<Int>()13result should beEmpty()14import io.kotest.matchers.maps.beEmpty15val result = mapOf<String, String>()16result should beEmpty()17import io.kotest.matchers.sequences.beEmpty18val result = listOf<Int>().asSequence()19result should beEmpty()20import io.kotest.matchers.strings.beEmpty21result should beEmpty()22import io.kotest.matchers.strings.beEmpty23result should beEmpty()24import io.kotest.matchers.strings.beEmpty25result should beEmpty()26import io.kotest.matchers.strings.beEmpty27result should beEmpty()

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