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

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

TypeMatchersTest.kt

Source: TypeMatchersTest.kt Github

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...10import 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 }...

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instanceOf

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1 import io.kotest.matchers.types.shouldBeInstanceOf2 import io.kotest.matchers.types.shouldBeTypeOf3 import io.kotest.matchers.types.shouldNotBeInstanceOf4 import io.kotest.matchers.types.shouldNotBeTypeOf5 import io.kotest.matchers.nulls.shouldBeNull6 import io.kotest.matchers.nulls.shouldNotBeNull7 import io.kotest.matchers.collections.shouldHaveSize8 import io.kotest.matchers.collections.shouldContain9 import io.kotest.matchers.collections.shouldContainAll10 import io.kotest.matchers.collections.shouldContainAllInAnyOrder11 import io.kotest.matchers.collections.shouldContainExactly12 import io.kotest.matchers.collections.shouldContainExactlyInAnyOrder13 import io.kotest.matchers.collections.shouldContainInOrder14 import io.kotest.matchers.collections.shouldContainNone15 import io.kot

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instanceOf

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1 instanceOf<Person>(Person::class)2 beInstanceOf<Person>(Person::class)3 shouldBeInstanceOf<Person>(Person::class)4 shouldBeTypeOf<Person>(Person::class)5 shouldBeTheSameInstanceAs(Person::class)6 shouldNotBeTheSameInstanceAs(Person::class)7 shouldBeSameInstanceAs(Person::class)8 shouldNotBeSameInstanceAs(Person::class)9 shouldNotBeInstanceOf<Person>(Person::class)10 shouldNotBeTypeOf<Person>(Person::class)11 shouldBeTheSameInstanceAs(Person::class)12 shouldNotBeTheSameInstanceAs(Person::class)13 shouldBeSameInstanceAs(Person::class)14 shouldNotBeSameInstanceAs(Person::class)15 shouldBeTheSameInstanceAs(Person::class)

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instanceOf

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1 import io.kotest.matchers.types.instanceOf2 result should instanceOf<SomeType>()3 import io.kotest.matchers.types.isInstanceOf4 result should isInstanceOf<SomeType>()5 import io.kotest.matchers.types.isNotInstanceOf6 result should isNotInstanceOf<SomeType>()7 import io.kotest.matchers.types.isNull8 result should isNull()9 import io.kotest.matchers.types.isNotNull10 result should isNotNull()11 import io.kotest.matchers.types.isSameInstanceAs12 result should isSameInstanceAs(SomeType())13 import io.kotest.matchers.types.isNotSameInstanceAs14 result should isNotSameInstanceAs(SomeType())15 import io.kotest.matchers.types.isSubtypeOf16 result should isSubtypeOf<SomeType>()17 import io.kotest.matchers.types.isNotSubtypeOf18 result should isNotSubtypeOf<SomeType>()19 import io.kotest.matchers.types.isSupertypeOf20 result should isSupertypeOf<SomeType>()21 import io.kotest.matchers.types.isNotSupertypeOf22 result should isNotSupertypeOf<SomeType>()

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instanceOf

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1+import io.kotest.matchers.types.instanceOf2 import org.junit.jupiter.api.Test3 import org.junit.jupiter.api.assertThrows4 import org.junit.jupiter.api.function.Executable5@@ -41,7 +43,7 @@ import kotlin.test.assertEquals6 class TestAssertions {7 fun `test assert`() {8- assertThrows(AssertionError::class.java) {9+ assertThrows<AssertionError> {10 assert(false)11 }12 }13@@ -49,7 +51,7 @@ class TestAssertions {14 }15- fun `test assert with message`() {16+ fun `test assert with message`() = assertThrows<AssertionError> {17 assert(false) { "this is a message" }18 }19@@ -57,7 +59,7 @@ class TestAssertions {20 }21- fun `test assert with lazy message`() {22+ fun `test assert with lazy message`() = assertThrows<AssertionError> {23 assert(false) { "this is a ${"message"}" }24 }25@@ -65,7 +67,7 @@ class TestAssertions {26 }27- fun `test assertTrue`() {28+ fun `test assertTrue`() = assertThrows<AssertionError> {29 assertTrue(false)30 }31@@ -73,7 +75,7 @@ class TestAssertions {32 }33- fun `test assertTrue with message`() {34+ fun `test assertTrue with message`() = assertThrows<AssertionError> {35 assertTrue(false) { "this is a message" }36 }37@@ -81,7 +83,7 @@ class TestAssertions {38 }39- fun `test assertTrue with lazy message`() {40+ fun `test assertTrue with lazy message`() = assertThrows<AssertionError> {41 assertTrue(false) { "this is a ${"message"}" }42 }43@@ -89,7 +91,7 @@ class TestAssertions {44 }45- fun `test assertFalse`() {46+ fun `test assertFalse`() = assertThrows<AssertionError> {47 assertFalse(true)48 }49@@ -97,7 +99,7 @@ class TestAssertions {50 }51- fun `test assertFalse with message`() {

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instanceOf

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1import io.kotest.matchers.types.shouldBeInstanceOf2obj.shouldBeInstanceOf<String>()3import io.kotest.matchers.types.shouldBeTypeOf4obj.shouldBeTypeOf<String>()5import io.kotest.matchers.types.shouldBeTypeOf6obj.shouldBeTypeOf<String>()7import io.kotest.matchers.types.shouldBeTypeOf8obj.shouldBeTypeOf<String>()9import io.kotest.matchers.types.shouldBeTypeOf10obj.shouldBeTypeOf<String>()11import io.kotest.matchers.types.shouldBeTypeOf12obj.shouldBeTypeOf<String>()13import io.kotest.matchers.types.shouldBeTypeOf14obj.shouldBeTypeOf<String>()15import io.kotest.matchers.types.shouldBeTypeOf16obj.shouldBeTypeOf<String>()17import io.kotest.matchers.types.shouldBeTypeOf

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instanceOf

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1 val result = listOf("a", "b", "c").first()2 }3}4fun <T> T.shouldBeTypeOf(type: KClass<T>): T5import io.kotest.core.spec.style.FunSpec6import io.kotest.matchers.types.shouldBeTypeOf7import kotlin.reflect.KClass8class TypeMatchersUnitTest : FunSpec({9 test("String should be an instance of String") {10 val result = listOf("a", "b", "c").first()11 }12})13fun <T> T.shouldNotBeTypeOf(type: KClass<T>): T

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instanceOf

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1+a should beInstanceOf<String>()2+b shouldNot beInstanceOf<String>()3+shouldThrow<ArithmeticException> {4+}5+val a = listOf(1, 2, 3)6+val a = mapOf(1 to "One", 2 to "Two")

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