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Added inline version for intanceOf alias #1838

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merged 1 commit into from
Nov 9, 2020
Merged

Added inline version for intanceOf alias #1838

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2 changes: 2 additions & 0 deletions ...ons/kotest-assertions-core/src/commonMain/kotlin/io/kotest/matchers/types/TypeMatchers.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,8 @@ import kotlin.reflect.KClass
// alias for beInstanceOf
fun instanceOf(expected: KClass<*>): Matcher<Any?> = beInstanceOf(expected)

inline fun <reified T : Any> instanceOf(): Matcher<Any?> = instanceOf(T::class)

fun beInstanceOf(expected: KClass<*>): Matcher<Any?> = neverNullMatcher { value ->
MatcherResult(
expected.isInstance(value),
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23 changes: 16 additions & 7 deletions ...assertions-core/src/jvmTest/kotlin/com/sksamuel/kotest/matchers/types/TypeMatchersTest.kt
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Expand Up @@ -12,6 +12,7 @@ import io.kotest.matchers.should
import io.kotest.matchers.shouldBe
import io.kotest.matchers.shouldNot
import io.kotest.matchers.types.haveAnnotation
import io.kotest.matchers.types.instanceOf
import io.kotest.matchers.types.shouldBeInstanceOf
import io.kotest.matchers.types.shouldBeSameInstanceAs
import io.kotest.matchers.types.shouldBeTypeOf
Expand Down Expand Up @@ -52,19 +53,27 @@ class TypeMatchersTest : WordSpec() {
val arrayList: List<Int> = arrayListOf(1, 2, 3)

arrayList should beInstanceOf(ArrayList::class)
arrayList should beInstanceOf<ArrayList<*>>()
arrayList should instanceOf(ArrayList::class)
arrayList should instanceOf<ArrayList<*>>()
arrayList.shouldBeInstanceOf<ArrayList<*>>()

arrayList should beInstanceOf(List::class)

shouldThrow<AssertionError> {
arrayList should beInstanceOf(LinkedList::class)
}
arrayList should beInstanceOf<List<*>>()
arrayList should instanceOf(List::class)
arrayList should instanceOf<List<*>>()
arrayList.shouldBeInstanceOf<List<*>>()

shouldThrow<AssertionError> { arrayList should beInstanceOf(LinkedList::class) }
shouldThrow<AssertionError> { arrayList should beInstanceOf(LinkedList::class) }
shouldThrow<AssertionError> { arrayList should beInstanceOf<LinkedList<*>>() }
shouldThrow<AssertionError> { arrayList should instanceOf(LinkedList::class) }
shouldThrow<AssertionError> { arrayList should instanceOf<LinkedList<*>>() }
shouldThrow<AssertionError> { arrayList.shouldBeInstanceOf<LinkedList<*>>() }

arrayList.shouldNotBeInstanceOf<LinkedList<*>>()

shouldThrow<AssertionError> {
arrayList.shouldNotBeInstanceOf<ArrayList<*>>()
}
shouldThrow<AssertionError> { arrayList.shouldNotBeInstanceOf<ArrayList<*>>() }
}

"use smart contracts to cast" {
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