chore(build): Correctly set version restrictions on different Gradle versions

also bring in cross-version testing

Author: zml2008

build.gradle.kts

@@ -22,6 +22,8 @@ subprojects {
     apply(plugin = "net.kyori.indra.licenser.spotless")
     apply(plugin = "net.kyori.indra.git")
 
+    val indra = extensions.getByType(IndraExtension::class)
+    val testTargets = listOf(11, 17, 21)
     if (project.name != "spongegradle-testlib") {
         plugins.apply(JavaGradlePluginPlugin::class)
         apply(plugin = "com.gradle.plugin-publish")
@@ -43,6 +45,16 @@ subprojects {
                     implementation(project(":spongegradle-testlib"))
                 }
                 testType.set(TestSuiteType.FUNCTIONAL_TEST)
+                targets {
+                    testTargets.forEach { runtimeVersion ->
+                        register("functionalTestJava$runtimeVersion") {
+                            testTask.configure {
+                                javaLauncher = project.extensions.getByType(JavaToolchainService::class).launcherFor { languageVersion = JavaLanguageVersion.of(runtimeVersion) }
+                                onlyIf { JavaVersion.current().ordinal + 1 != runtimeVersion && indra.javaVersions().strictVersions().get() }
+                            }
+                        }
+                    }
+                }
             }
 
             tasks.named("check") {
@@ -71,13 +83,17 @@ subprojects {
         )
     }
 
-    extensions.configure(IndraExtension::class) {
+    with(indra) {
         github("SpongePowered", "SpongeGradle") {
             ci(true)
             publishing(true)
         }
         mitLicense()
 
+        javaVersions {
+            testWith().addAll(testTargets)
+        }
+
         configurePublications {
             pom {
                 developers {

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ indra = "3.1.3"
 pluginPublish = "1.2.1"
 spotless = "6.25.0"
 junit = "5.9.3"
-mammoth = "1.3.1"
+mammoth = "1.4.0"
 
 [libraries]
 gson = { module = "com.google.code.gson:gson", version = "2.11.0" }

testlib/src/main/java/org/spongepowered/gradle/build/SpongeGradleFunctionalTest.java

@@ -40,9 +40,10 @@
  */
 @GradleFunctionalTest
 @GradleParameters({"--warning-mode", "fail", "--stacktrace"})
-@TestVariant(gradleVersion = "7.5.1")
-@TestVariant(gradleVersion = "7.5.1", extraArguments = "--configuration-cache")
-@TestVariantResource(value = "/injected-gradle-versions", optional = true)
+@TestVariant(gradleVersion = "7.6.4", maximumRuntimeVersion = 20)
+@TestVariant(gradleVersion = "7.6.4", extraArguments = "--configuration-cache", maximumRuntimeVersion = 20)
+@TestVariant(gradleVersion = "8.10", extraArguments = "--configuration-cache", minimumRuntimeVersion = 17)
+@TestVariantResource(value = "/injected-gradle-versions", optional = true, minimumRuntimeVersion = 17)
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.ANNOTATION_TYPE, ElementType.METHOD})