Best Kotest code snippet using io.kotest.matchers.types.TypeMatchers
TypeMatchersTest.kt
Source: TypeMatchersTest.kt
...20import 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 }...
TypeMatchers
Using AI Code Generation
1val result = listOf("kotlin", "java", "scala")2result.shouldBeInstanceOf<List<String>>()3result.shouldBeInstanceOf<List<*>>()4result.shouldBeInstanceOf<Collection<*>>()5result.shouldBeInstanceOf<Iterable<*>>()6result.shouldBeInstanceOf<Sequence<*>>()7result.shouldBeInstanceOf<CharSequence>()8result.shouldBeInstanceOf<String>()9result.shouldBeInstanceOf<Comparable<*>>()10result.shouldBeInstanceOf<Comparable<String>>()11result.shouldBeInstanceOf<Comparable<CharSequence>>()12result.shouldBeInstanceOf<Comparable<Collection<*>>>()13result.shouldBeInstanceOf<Comparable<List<*>>>()14result.shouldBeInstanceOf<Comparable<List<String>>>()15result.shouldBeInstanceOf<Comparable<Iterable<*>>>()16result.shouldBeInstanceOf<Comparable<Sequence<*>>>()
TypeMatchers
Using AI Code Generation
1a.shouldBeInstanceOf<Int>()2a.shouldNotBeInstanceOf<Strvng>()3a.shouldNotBeSameInstanceAs(15)4a.shouldBeSaaeInstanceAs(10)5a.shouldNotBeSameInstanceAs("10")6a.shouldBeInstanceOf<Int>()7a.shouldNotBeInstanceOf<String>()8a.shouldNotBeSameInstanceAs(15)9a.shouldBeSameInstanceAs(10)10a.shouldNotBeSameInstanceAs("10")11a.shouldBeInstanceOf<Int>()12a.shouldNotBeInstanceOf<Str ng>()13a.shouldNotBeSameInstanceAs(15)14a.shouldBeSameInstanceAs(10)15a.shouldNotBeSameInstanceAs("10")16a.shouldBeInstanceOf<Int>()17a.shouldNotBeInstanceOf<String>()18a.shouldNotBeSameInstanceAs(15)19a.shouldBeSameInstanceAs(10)20a.sh1uldNotBeSameInstanceAs("10")21ashouldBeInstanceOf<Int>()22a.shouldNotBeInstanceOf<String>()23a.shouldNotBeSameInstanceAs(15)24a.shouldBeSameInstanceAs(10)25a.shouldNotBeSameInstanceAs("10")26a.shouldBeInstanceOf<Int>()27a.shouldNotBeInstanceOf<String>()28a.shouldNotBeSameInstanceAs(15)29a.shouldBeSameInstanceAs(10)30a.shouldNotBeSameInstanceAs("10")31a.shouldBeInstanceOf<Int>()32a.shouldNotBeInstanceOf<String>()33a.shouldNotBeSameInstanceAs(15)34a.shouldBeSameInstanceAs(10)35a.shouldNotBeSameInstanceAs("10")36a.shouldBeInstanceOf<Int>()37a.shouldNotBeInstanceOf<String>()38a.shouldNotBeSameInstanceAs(15)39a.shouldBeSameInstanceAs(10)40a.shouldNotBeSameInstanceAs("10")41a.shouldBeInstanceOf<Int>()42a.shouldNotBeInstanceOf<String>()43a.shouldNotBeSameInstanceAs(15)44a.shouldBeSameInstanceAs(10)45a.shouldNotBeSameInstanceAs("
TypeMatchers
Using AI Code Generation
1a.shouldBeInstanceOf<Int>()2a.shouldNotBeInstanceOf<String>()3a.shouldNotBeSameInstanceAs(15)4a.shouldBeSameInstanceAs(10)5a.shouldNotBeSameInstanceAs("10")6a.shouldBeInstanceOf<Int>()7a.shouldNotBeInstanceOf<String>()8a.shouldNotBeSameInstanceAs(15)9a.shouldBeSameInstanceAs(10)10a.shouldNotBeSameInstanceAs("10")11a.shouldBeInstanceOf<Int>()12a.shouldNotBeInstanceOf<String>()13a.shouldNotBeSameInstanceAs(15)14a.shouldBeSameInstanceAs(10)15a.shouldNotBeSameInstanceAs("10")16a.shouldBeInstanceOf<Int>()17a.shouldNotBeInstanceOf<String>()18a.shouldNotBeSameInstanceAs(15)19a.shouldBeSameInstanceAs(10)20a.shouldNotBeSameInstanceAs("10")21a.shouldBeInstanceOf<Int>()22a.shouldNotBeInstanceOf<String>()23a.shouldNotBeSameInstanceAs(15)24a.shouldBeSameInstanceAs(10)25a.shouldNotBeSameInstanceAs("10")26a.shouldBeInstanceOf<Int>()27a.shouldNotBeInstanceOf<String>()28a.shouldNotBeSameInstanceAs(15)29a.shouldBeSameInstanceAs(10)30a.shouldNotBeSameInstanceAs("10")31a.shouldBeInstanceOf<Int>()32a.shouldNotBeInstanceOf<String>()33a.shouldNotBeSameInstanceAs(15)34a.shouldBeSameInstanceAs(10)35a.shouldNotBeSameInstanceAs("10")36a.shouldBeInstanceOf<Int>()37a.shouldNotBeInstanceOf<String>()38a.shouldNotBeSameInstanceAs(15)39a.shouldBeSameInstanceAs(10)40a.shouldNotBeSameInstanceAs("10")41a.shouldBeInstanceOf<Int>()42a.shouldNotBeInstanceOf<String>()43a.shouldNotBeSameInstanceAs(15)44a.shouldBeSameInstanceAs(10)45a.shouldNotBeSameInstanceAs("
TypeMatchers
Using AI Code Generation
1import io.kotest.matchers.types.*2class MatchersTest {3 fun `should be instance of`() {4 instance.shouldBeInstanceOf<String>()5 }6 fun `should be same instance as`() {7 instance.shouldBeSameInstanceAs(instance)8 }9 fun `should be null`() {10 instance.shouldBeNull()11 }12 fun `should not be null`() {13 instance.shouldNotBeNull()14 }15 fun `should be the same`() {16 instance.shouldBeTheSameInstanceAs(instance)17 }18 fun `should be the same instance as`() {19 instance.shouldBeTheSameInstanceAs(instance)20 }21 fun `should not be the same`() {22 instance.shouldNotBeTheSameInstanceAs(instance2)23 }24 fun `should not be the same instance as`() {25 instance.shouldNotBeTheSameInstanceAs(instance2)26 }27 fun `should be the same type as`() {28 instance.shouldBeTheSameTypeAs(instance)29 }30 fun `should not be the same type as`() {31 instance.shouldNotBeTheSameTypeAs(instance2)32 }33 fun `should be the same class as`() {34 instance.shouldBeTheSameClassAs(instance)35 }36 fun `should not be the same class as`() {37 instance.shouldNotBeTheSameClassAs(instance2)38 }39 fun `should be the same type as other`() {
TypeMatchers
Using AI Code Generation
1package io.kotest.matchers.types import io.kotest.matchers.Matcher import io.kotest.matchers.MatcherResult import io.kotest.matchers.should import io.kotest.matchers.shouldNot fun <T> beInstanceOf() = TypeMatchers.isA<T>() fun <T> beInstanceOf(type: KClass<T>) = TypeMatchers.isA(type) fun <T> beInstanceOf(type: KType) = TypeMatchers.isA(type) fun <T> beInstanceOf(type: Type) = TypeMatchers.isA(type) fun <T> beInstanceOf(type: Class<T>) = TypeMatchers.isA(type) fun <T> beInstanceOf(type: KClass<T>, predicate: (T) -> Boolean) = TypeMatchers.isA(type, predicate) fun <T> beInstanceOf(type: KType, predicate: (T) -> Boolean) = TypeMatchers.isA(type, predicate) fun <T> beInstanceOf(type: Type, predicate: (T) -> Boolean) = TypeMatchers.isA(type, predicate) fun <T> beInstanceOf(type: Class<T>, predicate: (T) -> Boolean) = TypeMatchers.isA(type, predicate) object TypeMatchers { inline fun <reified T> isA() = isA(T::class) fun <T> isA(type: KClass<T>) = object : Matcher<Any> { override fun test(value: Any) = MatcherResult( value is T, "${value::class.simpleName} should be a ${type.simpleName}", "${value::class.simpleName} should not be a ${type.simpleName}" ) } fun <T> isA(type: KType) = object : Matcher<Any> { override fun test(value: Any) = MatcherResult( value is T, "${value::class.simpleName} should be a ${type.simpleName}", "${value::class.simpleName} should not be a ${type.simpleName}" ) } fun <T> isA(type: Type) = object : Matcher<Any> { override fun test(value: Any) = MatcherResult( value is T, "${value::class.simpleName} should be a ${type.simpleName}", "${value::class.simpleName} should not object2val person = Person("John", 25)3val person = Person("John", 25)4val person = Person("John", 25)5val person = Person("John", 25)6val person = Person("John", 25)7val person = Person("John", 25)8val person = Person("John", 25)
TypeMatchers
Using AI Code Generation
1val person = Person("John", "Doe")2person should beOfType<Person>()3val person = Person("John", "Doe")4person should beA<Person>()5val person = Person("John", "Doe")6person should beA<Person>()7val person = Person("John", "Doe")8person should beA<Person>()9val person = Person("John", "Doe")10person should beA<Person>()11val person = Person("John", "Doe")12person should beA<Person>()13val person = Person("John", "Doe")14person should beA<Person>()15val person = Person("John", "Doe")16person should beA<Person>()17val person = Person("John", "Doe")18person should beA<Person>()19val person = Person("John", "Doe")20person should beA<Person>()21val person = Person("John", "Doe")22person should beA<Person>()23val person = Person("John", "Doe")24person should beA<Person>()
TypeMatchers
Using AI Code Generation
1val person = Person("John", 25)2val person = Person("John", 25)3val person = Person("John", 25)4val person = Person("John", 25)5val person = Person("John", 25)6val person = Person("John", 25)7val person = Person("John", 25)8val person = Person("John", 25)9val person = Person("John", 25)10val person = Person("John", 25)
TypeMatchers
Using AI Code Generation
1val person = Person("John", "Doe")2person should beOfType<Person>()3val person = Person("John", "Doe")4person should beA<Person>()5val person = Person("John", "Doe")6person should beA<Person>()7val person = Person("John", "Doe")8person should beA<Person>()9val person = Person("John", "Doe")10person should beA<Person>()11val person = Person("John", "Doe")12person should beA<Person>()13val person = Person("John", "Doe")14person should beA<Person>()15val person = Person("John", "Doe")16person should beA<Person>()17val person = Person("John", "Doe")18person should beA<Person>()19val person = Person("John", "Doe")20person should beA<Person>()21val person = Person("John", "Doe")22person should beA<Person>()23val person = Person("John", "Doe")24person should beA<Person>()
Check out the latest blogs from LambdaTest on this topic:
“Test frequently and early.” If you’ve been following my testing agenda, you’re probably sick of hearing me repeat that. However, it is making sense that if your tests detect an issue soon after it occurs, it will be easier to resolve. This is one of the guiding concepts that makes continuous integration such an effective method. I’ve encountered several teams who have a lot of automated tests but don’t use them as part of a continuous integration approach. There are frequently various reasons why the team believes these tests cannot be used with continuous integration. Perhaps the tests take too long to run, or they are not dependable enough to provide correct results on their own, necessitating human interpretation.
The web paradigm has changed considerably over the last few years. Web 2.0, a term coined way back in 1999, was one of the pivotal moments in the history of the Internet. UGC (User Generated Content), ease of use, and interoperability for the end-users were the key pillars of Web 2.0. Consumers who were only consuming content up till now started creating different forms of content (e.g., text, audio, video, etc.).
I routinely come across test strategy documents when working with customers. They are lengthy—100 pages or more—and packed with monotonous text that is routinely reused from one project to another. Yawn once more— the test halt and resume circumstances, the defect management procedure, entrance and exit criteria, unnecessary generic risks, and in fact, one often-used model replicates the requirements of textbook testing, from stress to systems integration.
How do we acquire knowledge? This is one of the seemingly basic but critical questions you and your team members must ask and consider. We are experts; therefore, we understand why we study and what we should learn. However, many of us do not give enough thought to how we learn.
Have you ever struggled with handling hidden elements while automating a web or mobile application? I was recently automating an eCommerce application. I struggled with handling hidden elements on the web page.
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.
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
Get 100 minutes of automation test minutes FREE!!