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

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

TypeMatchersTest.kt

Source: TypeMatchersTest.kt Github

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...3import 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 }105 "Allow execution with a lambda" {106 val list: Any = arrayListOf(1, 2, 3)107 list.shouldBeTypeOf<ArrayList<Int>> {108 it shouldBeSameInstanceAs list109 it[0] shouldBe 1110 }111 }112 "Returns typecasted value when executed with a lambda" {113 val list: Any = arrayListOf(1, 2, 3)114 val typecastedList = list.shouldBeTypeOf<ArrayList<Int>> {}115 typecastedList shouldBeSameInstanceAs list116 typecastedList[0] shouldBe 1117 }118 "uses smart contracts to cast" {119 val list: Any = arrayListOf(1, 2, 3)120 list.shouldBeTypeOf<ArrayList<Int>>()121 list[0] shouldBe 1122 }123 "return the receiver" {124 arrayListOf(1, 2, 3)125 .shouldBeTypeOf<ArrayList<Int>>()126 .shouldHaveSize(3)127 }128 "accepts null values" {129 val arrayList: List<Int>? = null130 shouldThrow<AssertionError> { arrayList should beOfType<List<Int>>() }131 shouldThrow<AssertionError> { arrayList.shouldBeTypeOf<List<*>>() }132 shouldThrow<AssertionError> { arrayList shouldNot beOfType<List<Int>>() }133 shouldThrow<AssertionError> { arrayList.shouldNotBeTypeOf<List<*>>() }134 }135 }136 "TypeMatchers.theSameInstanceAs" should {137 "test that references are equal" {138 val b: List<Int>? = listOf(1, 2, 3)139 val a: List<Int>? = b140 val c: List<Int>? = listOf(1, 2, 3)141 a should beTheSameInstanceAs(b)142 a.shouldBeSameInstanceAs(b)143 shouldThrow<AssertionError> {144 a should beTheSameInstanceAs(c)145 }146 shouldThrow<AssertionError> {147 a.shouldBeSameInstanceAs(c)148 }149 }150 }151 "beTheSameInstanceAs" should {152 "test that references are equal" {153 val b = listOf(1, 2, 3)154 val a = b155 val c = listOf(1, 2, 3)156 a should beTheSameInstanceAs(b)157 shouldThrow<AssertionError> {158 a should beTheSameInstanceAs(c)159 }160 }161 }162 "beNull" should {163 val nullString: String? = null164 val nonNullString: String? = "Foo"165 "Pass for a null value" {166 nullString.shouldBeNull()167 nullString should beNull()168 }169 "Fail for a non-null value" {170 shouldThrow<AssertionError> { nonNullString.shouldBeNull() }171 shouldThrow<AssertionError> { nonNullString should beNull() }172 }...

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beTheSameInstanceAs

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1import io.kotest.matchers.types.beTheSameInstanceAs2import io.kotest.assertions.shouldNotBe3import io.kotest.assertions.shouldNotBe4import io.kotest.assertions.shouldBe5import io.kotest.assertions.shouldBe6import io.kotest.assertions.shouldBe7import io.kotest.assertions.shouldBe8import io.kotest.assertions.shouldBe9import io.kotest.assertions.shouldNotBe10import io.kotest.assertions.shouldNotBe11import io.kotest.assertions.shouldBe12import io.kotest.assertions.shouldBe13import io.kotest.assertions.shouldBe14import io.kotest.assertions.shouldBe15import io.kotest.assertions.shouldNotBe16import io.kotest.assertions.shouldNotBe17import io.kotest.assertions.shouldBe18import io.kotest.assertions.shouldBe

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beTheSameInstanceAs

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1val book1 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)2val book2 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)3book1.shouldBeSameInstanceAs(book2)4val book1 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)5val book2 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)6book1.shouldBeSameInstanceAs(book2)7val book1 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)8val book2 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)9book1.shouldBeSameInstanceAs(book2)10val book1 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)11val book2 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)12book1.shouldBeSameInstanceAs(book2)13val book1 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)14val book2 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)15book1.shouldBeSameInstanceAs(book2)16val book1 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)17val book2 = Book(1, "Kotlin in Action", "Dmitry Jemerov", 2017)18book1.shouldBeSameInstanceAs(book2)

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beTheSameInstanceAs

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1import io.kotest.matchers.types.beTheSameInstanceAs2result should beTheSameInstanceAs("Hello World")3import io.kotest.matchers.types.beTheSameInstanceAs4result should beTheSameInstanceAs("Hello World")5import io.kotest.matchers.types.beTheSameInstanceAs6result should beTheSameInstanceAs("Hello World")7import io.kotest.matchers.types.beTheSameInstanceAs8result should beTheSameInstanceAs("Hello World")9import io.kotest.matchers.types.beTheSameInstanceAs10result should beTheSameInstanceAs("Hello World")11import io.kotest.matchers.types.beTheSameInstanceAs12result should beTheSameInstanceAs("Hello World")13import io.kotest.matchers.types.beTheSameInstanceAs14result should beTheSameInstanceAs("Hello World")15import io.kotest.matchers.types.beTheSameInstanceAs16result should beTheSameInstanceAs("Hello World")17import io.kotest.matchers.types.beTheSameInstanceAs18result should beTheSameInstanceAs("Hello World")19import io.kotest.matchers.types.beTheSameInstance

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