mockito-kotlinでvalue classがサポートされたらしいのでメモ

控えめに言って神 github.com 5.4.0のリリースに含まれている github.com

build.gradle.kts

plugins {
    kotlin("jvm") version "2.0.0"
}

group = "com.github.atr0phy"
version = "1.0-SNAPSHOT"

repositories {
    mavenCentral()
}

dependencies {
    testImplementation(kotlin("test"))
    testImplementation("org.mockito.kotlin:mockito-kotlin:5.4.0")
}

tasks.test {
    useJUnitPlatform()
}
kotlin {
    jvmToolchain(17)
}

コード

import org.mockito.Mockito.mockStatic
import org.mockito.kotlin.any
import kotlin.test.Test
import kotlin.test.assertEquals

@JvmInline
value class SampleValue(val value: String)

object SampleValueRepository {
    @JvmStatic
    fun save(sampleValue: SampleValue): SampleValue {
        return sampleValue
    }
}

private class SampleValueRepositoryTest {
    @Test
    fun test() {
        // setup
        val expected = SampleValue("mocked")
        val mocked = mockStatic(SampleValueRepository::class.java)
        mocked.`when`<SampleValue> { SampleValueRepository.save(any()) }.thenReturn(expected)
        // どっちでもいける
        // mocked.`when`<SampleValue> { SampleValueRepository.save(anyValueClass()) }.thenReturn(expected)

        // exercise
        val actual = SampleValueRepository.save(SampleValue("call"))

        // verify
        assertEquals(expected, actual)
    }
}

結果

5.4.0

> Task :checkKotlinGradlePluginConfigurationErrors SKIPPED
> Task :compileKotlin NO-SOURCE
> Task :compileJava NO-SOURCE
> Task :processResources NO-SOURCE
> Task :classes UP-TO-DATE
> Task :processTestResources NO-SOURCE
> Task :compileTestKotlin
> Task :compileTestJava NO-SOURCE
> Task :testClasses UP-TO-DATE
> Task :test
BUILD SUCCESSFUL in 3s
2 actionable tasks: 2 executed
23:35:44:  ':test --tests "SampleValueTest"' の実行を完了しました。

5.3.1

> Task :checkKotlinGradlePluginConfigurationErrors SKIPPED
> Task :compileKotlin NO-SOURCE
> Task :compileJava NO-SOURCE
> Task :processResources NO-SOURCE
> Task :classes UP-TO-DATE
> Task :processTestResources NO-SOURCE
> Task :compileTestKotlin
> Task :compileTestJava NO-SOURCE
> Task :testClasses UP-TO-DATE


Misplaced or misused argument matcher detected here:

-> at SampleValueTest.test$lambda$0(SampleValueTest.kt:32)

You cannot use argument matchers outside of verification or stubbing.
Examples of correct usage of argument matchers:
    when(mock.get(anyInt())).thenReturn(null);
    doThrow(new RuntimeException()).when(mock).someVoidMethod(any());
    verify(mock).someMethod(contains("foo"))

This message may appear after an NullPointerException if the last matcher is returning an object 
like any() but the stubbed method signature expect a primitive argument, in this case,
use primitive alternatives.
    when(mock.get(any())); // bad use, will raise NPE
    when(mock.get(anyInt())); // correct usage use

Also, this error might show up because you use argument matchers with methods that cannot be mocked.
Following methods *cannot* be stubbed/verified: final/private/equals()/hashCode().
Mocking methods declared on non-public parent classes is not supported.

org.mockito.exceptions.misusing.InvalidUseOfMatchersException: 
Misplaced or misused argument matcher detected here:

-> at SampleValueTest.test$lambda$0(SampleValueTest.kt:32)

You cannot use argument matchers outside of verification or stubbing.
Examples of correct usage of argument matchers:
    when(mock.get(anyInt())).thenReturn(null);
    doThrow(new RuntimeException()).when(mock).someVoidMethod(any());
    verify(mock).someMethod(contains("foo"))

This message may appear after an NullPointerException if the last matcher is returning an object 
like any() but the stubbed method signature expect a primitive argument, in this case,
use primitive alternatives.
    when(mock.get(any())); // bad use, will raise NPE
    when(mock.get(anyInt())); // correct usage use

Also, this error might show up because you use argument matchers with methods that cannot be mocked.
Following methods *cannot* be stubbed/verified: final/private/equals()/hashCode().
Mocking methods declared on non-public parent classes is not supported.

    at SampleValueTest.test(SampleValueTest.kt:22)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)


OpenJDK 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended
> Task :test FAILED
SampleValueTest > test() FAILED
    org.mockito.exceptions.misusing.InvalidUseOfMatchersException at SampleValueTest.kt:22
1 test completed, 1 failed

公式でサポートされたの嬉しい