Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

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

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

TypeMatchersTest.kt

Source:TypeMatchersTest.kt

2import 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      }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> {...

beOfType

Using AI Code Generation

1    import io.kotest.matchers.types.beOfType2    import io.kotest.matchers.types.shouldBeOfType3    import io.kotest.matchers.types.shouldNotBeOfType4    import io.kotest.matchers.types.shouldNotBeSameInstanceAs5    import io.kotest.matchers.types.shouldNotBeSameTypeAs6    import io.kotest.matchers.types.shouldNotBeNull7    import io.kotest.matchers.types.shouldNotBeSameInstanceAs8    import io.kotest.matchers.types.shouldNotBeSameTypeAs9    import io.kotest.matchers.types.shouldNotBeNull10    import io.kotest.matchers.types.shouldNotBeSameInstanceAs11    import io.kotest.matchers.types.shouldNotBeSameTypeAs12    import io.kotest.matchers.types.shouldNotBeNull13    import io.kotest.matchers.types.shouldNotBeSameInstanceAs14    import io.kotest.matchers.types.shouldNotBeSameTypeAs15    import io.kotest.matchers.types.shouldNotBeNull16    import io.kotest.matchers.types.shouldNotBeSameInstanceAs17    import io.kotest.matchers.types.shouldNotBeSameTypeAs18    import io.kotest.matchers.types.shouldNotBeNull19    import io.kotest.matchers.types.shouldNotBeSameInstanceAs20    import io.kotest.matchers.types.shouldNotBeSameTypeAs21    import io.kotest.matchers.types.shouldNotBeNull22    import io.kotest.matchers.types.shouldNotBeSameInstanceAs23    import io.kotest.matchers.types.shouldNotBeSameTypeAs24    import io.kotest.matchers.types.shouldNotBeNull25    import io.kotest.matchers.types.shouldNotBeSameInstanceAs26    import io.kotest.matchers.types.shouldNotBeSameTypeAs27    import io.kotest.matchers.types.shouldNotBeNull28    import io.kotest.matchers.types.shouldNotBeSameInstanceAs29    import io.kotest.matchers.types.shouldNotBeSameTypeAs30    import io.kotest.matchers.types.shouldNotBeNull31    import io.kotest.matchers.types.shouldNotBeSameInstanceAs32    import io.kotest.matchers.types.shouldNotBeSameTypeAs33    import io.kotest.matchers.types.shouldNotBeNull34    import io.kotest.matchers.types

beOfType

Using AI Code Generation

1import io.kotest.matchers.shouldBe2import io.kotest.matchers.types.beOfType3import io.kotest.matchers.types.shouldBeInstanceOf4import io.kotest.matchers.types.shouldNotBeInstanceOf5import io.kotest.matchers.shouldBe6import io.kotest.matchers.types.beOfType7import io.kotest.matchers.types.shouldBeInstanceOf8import io.kotest.matchers.types.shouldNotBeInstanceOf9import io.kotest.matchers.shouldBe10import io.kotest.matchers.types.beOfType11import io.kotest.matchers.types.shouldBeInstanceOf12import io.kotest.matchers.types.shouldNotBeInstanceOf13import io.kotest.matchers.shouldBe14import io.kotest.matchers.types.beOfType15import io.kotest.matchers.types.shouldBeInstanceOf16import io.kotest.matchers.types.shouldNotBeInstanceOf17import io.kotest.matchers.shouldBe18import io.kotest.matchers.types.beOfType19import io.kotest.matchers.types.shouldBeInstanceOf20import io.kotest.matchers.types.shouldNotBeInstanceOf21import io.kotest.matchers.shouldBe22import io.kotest.matchers.types.beOfType23import io.kotest.matchers.types.shouldBeInstanceOf24import io.kotest.matchers.types.shouldNotBeInstanceOf25import io.kotest.matchers.shouldBe26import io.kotest.matchers.types.beOfType27import io.kotest.matchers.types.shouldBeInstanceOf28import io.kotest.matchers.types.shouldNotBeInstanceOf29import io.kotest.matchers.shouldBe30import io.kotest.matchers.types.beOfType31import io.kotest.matchers.types.shouldBeInstanceOf32import io

beOfType

Using AI Code Generation

1    it("should be of type") {2        a.shouldBeOfType<String>()3    }4    it("should be instance of") {5        a.shouldBeInstanceOf<String>()6    }7    it("should be null") {8        a.shouldBeNull()9    }10    it("should not be null") {11        a.shouldNotBeNull()12    }13    it("should be one of") {14        a.shouldBeOneOf("abc", "def")15    }16    it("should be the same instance as") {17        a.shouldBeTheSameInstanceAs("abc")18    }19    it("should not be the same instance as") {20        a.shouldNotBeTheSameInstanceAs("def")21    }22    it("should be the same instance as") {23        a.shouldBeTheSameInstanceAs("abc")24    }25    it("should not be the same instance as") {26        a.shouldNotBeTheSameInstanceAs("def")27    }28    it("should be the same instance as") {

beOfType

Using AI Code Generation

1fun <T : Any> beOfType(expected: KClass<T>) = object : Matcher<T> {2override fun test(value: T) = Result(3}4val list = listOf("a", "b", "c")5list should beOfType(List::class)6list should beOfType(ArrayList::class)7list should beOfType(List::class)8list should beOfType(ArrayList::class)9fun <T : Any> beOfType(expected: KClass<T>) = object : Matcher<T> {10override fun test(value: T) = Result(11}12val list = listOf("a", "b", "c")13list should beOfType(List::class)14list should beOfType(ArrayList::class)15list should beOfType(List::class)16list should beOfType(ArrayList::class)17fun <T : Any> beOfType(expected: KClass<T>) = object : Matcher<T> {18override fun test(value: T) = Result(19}20val list = listOf("a", "b", "c")21list should beOfType(List::class)22list should beOfType(ArrayList::class)23list should beOfType(List::class)24list should beOfType(ArrayList::class)25fun <T : Any> beOfType(expected: KClass<T>) = object : Matcher<T> {26override fun test(value: T) = Result(27}28val list = listOf("a", "b", "c")29list should beOfType(List::class)30list should beOfType(ArrayList::class)31list should beOfType(List::class)32list should beOfType(ArrayList::class)33fun <T : Any> beOfType(expected: KClass<T>) = object : Matcher<T> {

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.