Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! Join TestMu Conference

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

...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      }...

beTheSameInstanceAs

Using AI Code Generation

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

beTheSameInstanceAs

Using AI Code Generation

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)

beTheSameInstanceAs

Using AI Code Generation

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

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.