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 Github

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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 }...

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beInstanceOf

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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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