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

...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       }...

instanceOf

Using AI Code Generation

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

instanceOf

Using AI Code Generation

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)

instanceOf

Using AI Code Generation

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>()

instanceOf

Using AI Code Generation

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`() {

instanceOf

Using AI Code Generation

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

instanceOf

Using AI Code Generation

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

instanceOf

Using AI Code Generation

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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