Fix test related Gradle deprecation warnings (#936)

The following deprecation warnings have been fixed:

> Task :common:jvmTest
The automatic loading of test framework implementation dependencies has
been deprecated. This is scheduled to be removed in Gradle 9.0. Declare
the desired test framework directly on the test suite or explicitly
declare the test framework implementation dependencies on the test's
runtime classpath. Consult the upgrading guide for further information:
https://docs.gradle.org/8.6/userguide/upgrading_version_8.html#test_framework_implementation_dependencies

-> fixed by adding an explicit runtimeOnly dependency on
   org.junit.platform:junit-platform-launcher

> Task :core:live-tests:jvmTest
No test executed. This behavior has been deprecated. This will fail with
an error in Gradle 9.0. There are test sources present but no test was
executed. Please check your test configuration. Consult the upgrading
guide for further information:
https://docs.gradle.org/8.6/userguide/upgrading_version_8.html#test_task_fail_on_no_test_executed

-> fixed by configuring Test tasks with useJUnitPlatform() in
   kord-internal-multiplatform-module (used by :core:live-tests)

org.gradle.warning.mode was set to all to verify that these deprecation
warnings are indeed fixed on CI.

buildSrc/src/main/kotlin/kord-internal-multiplatform-module.gradle.kts

@@ -20,3 +20,9 @@ kotlin {
         }
     }
 }
+
+tasks {
+    withType<Test>().configureEach {
+        useJUnitPlatform()
+    }
+}

gradle.properties

@@ -4,6 +4,7 @@ nextPlannedVersion=0.14.0
 #dokka will run out of memory with the default meta space
 org.gradle.jvmargs=-XX:MaxMetaspaceSize=1024m
 org.gradle.parallel=true
+org.gradle.warning.mode=all
 org.gradle.kotlin.dsl.allWarningsAsErrors=true
 kotlin.code.style=official
 

gradle/libs.versions.toml

@@ -22,7 +22,8 @@ ksp = "1.9.22-1.0.17" # https://github.com/google/ksp
 kotlinpoet = "1.16.0" # https://github.com/square/kotlinpoet
 
 # tests
-junit5 = "5.10.2" # https://github.com/junit-team/junit5
+junit-jupiter = "5.10.2" # https://github.com/junit-team/junit5
+junit-platform = "1.10.2"
 mockk = "1.13.10" # https://github.com/mockk/mockk
 
 # plugins
@@ -75,7 +76,9 @@ kotlin-test-annotations-common = { module = "org.jetbrains.kotlin:kotlin-test-an
 kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test-common", version.ref = "kotlin" }
 kotlin-test-js = { module = "org.jetbrains.kotlin:kotlin-test-js", version.ref = "kotlin" }
 kotlin-test-junit5 = { module = "org.jetbrains.kotlin:kotlin-test-junit5", version.ref = "kotlin" }
-junit-jupiter-engine = { module = "org.junit.jupiter:junit-jupiter-engine", version.ref = "junit5" }
+junit-jupiter-api = { module = "org.junit.jupiter:junit-jupiter-api", version.ref = "junit-jupiter" }
+junit-jupiter-engine = { module = "org.junit.jupiter:junit-jupiter-engine", version.ref = "junit-jupiter" }
+junit-platform-launcher = { module = "org.junit.platform:junit-platform-launcher", version = "junit-platform" }
 mockk = { module = "io.mockk:mockk", version.ref = "mockk" }
 slf4j-simple = { module = "org.slf4j:slf4j-simple", version.ref = "slf4j" }
 
@@ -95,7 +98,8 @@ ktor-client-serialization = ["ktor-client-content-negotiation", "ktor-serializat
 
 test-common = ["kotlin-test-annotations-common", "kotlin-test", "kotlinx-coroutines-test"]
 test-js = ["kotlin-test-js", "kotlin-node"]
-test-jvm = ["kotlin-test-junit5", "junit-jupiter-engine", "slf4j-simple"]
+test-jvm = ["kotlin-test-junit5", "junit-jupiter-api"]
+test-jvm-runtime = ["junit-jupiter-engine", "junit-platform-launcher", "slf4j-simple"]
 
 pluginsForBuildSrc = [
     "kotlin-jvm-plugin",

test-kit/build.gradle.kts

@@ -18,6 +18,7 @@ kotlin {
         jvmMain {
             dependencies {
                 api(libs.bundles.test.jvm)
+                runtimeOnly(libs.bundles.test.jvm.runtime)
             }
         }
     }