Bump testing library versions (#169)

* Bump testing library versions.

* JUnit 5 integration in IDEA is well-implemented now.

* Downgrade Mockito 5.x to 4.x

Caused by: java.lang.UnsupportedClassVersionError: org/mockito/junit/jupiter/MockitoExtension has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0

build.gradle.kts

@@ -78,11 +78,13 @@ dependencies {
     implementation("com.squareup.retrofit2:converter-gson:2.9.0")
     implementation("net.jodah:failsafe:2.4.3")
 
-    testImplementation("org.junit.jupiter:junit-jupiter:5.8.1")
+    testImplementation("org.junit.jupiter:junit-jupiter:5.9.2")
     testImplementation("com.github.tomakehurst:wiremock:2.27.2")
     testImplementation("ru.lanwen.wiremock:wiremock-junit5:1.3.1")
-    testImplementation("org.assertj:assertj-core:3.21.0")
-    testImplementation("org.mockito:mockito-junit-jupiter:4.0.0")
+    testImplementation("org.assertj:assertj-core:3.24.2")
+    // This cannot be updated to 5.x as it requires Java 11,
+    // but we are running CI on Java 8 in .github/workflows/java-versions.yml.
+    testImplementation("org.mockito:mockito-junit-jupiter:4.11.0")
     testImplementation("com.nhaarman.mockitokotlin2:mockito-kotlin:2.2.0")
 }
 

src/test/kotlin/io/github/gradlenexus/publishplugin/TaskOrchestrationTest.kt

@@ -167,6 +167,5 @@ class TaskOrchestrationTest {
         return tasks.first()
     }
 
-    @Suppress("unused")
     private fun transitioningTaskNamesForSonatype(): List<String> = listOf("closeSonatypeStagingRepository", "releaseSonatypeStagingRepository")
 }

src/test/kotlin/io/github/gradlenexus/publishplugin/internal/StagingRepositoryTransitionerTest.kt

@@ -79,7 +79,6 @@ internal class StagingRepositoryTransitionerTest {
         inOrder.verify(nexusClient).getStagingRepositoryStateById(TEST_STAGING_REPO_ID)
     }
 
-    @Suppress("unused") //Idea doesn't noticed @MethodSource usage - https://youtrack.jetbrains.com/issue/KT-21429
     private fun repositoryStatesForRelease(): List<StagingRepository.State> {
         return listOf(StagingRepository.State.RELEASED, StagingRepository.State.NOT_FOUND)
     }