Test against multiple Java versions (#8988)

Author: eddumelendez

.github/actions/setup-build/action.yml

@@ -1,9 +1,16 @@
 name: Set up Build
 description: Sets up Build
+inputs:
+  java-version:
+    description: 'The Java version to set up'
+    required: true
+    default: '17'
 runs:
   using: "composite"
   steps:
     - uses: ./.github/actions/setup-java
+      with:
+        java-version: ${{ inputs.java-version }}
     - name: Clear existing docker image cache
       shell: bash
       run: docker image prune -af

.github/actions/setup-java/action.yml

@@ -1,9 +1,14 @@
 name: Set up Java
 description: Sets up Java version
+inputs:
+  java-version:
+    description: 'The Java version to set up'
+    required: true
+    default: '17'
 runs:
   using: "composite"
   steps:
     - uses: actions/setup-java@v4
       with:
-        java-version: '8'
+        java-version: ${{ inputs.java-version }}
         distribution: temurin

.github/settings.yml

@@ -400,7 +400,7 @@ branches:
         # Required. Require branches to be up to date before merging.
         strict: true
         # Required. The list of status checks to require in order to merge into this branch
-        contexts: ["core", "check_docs_examples (:docs:examples:check)", "in-docker_test", "ci/circleci: minimal_core", "test"]
+        contexts: ["core (17)", "core (21)", "check_docs_examples (:docs:examples:check)", "in-docker_test", "ci/circleci: minimal_core", "test"]
       # Required. Enforce all configured restrictions for administrators. Set to true to enforce required status checks for repository administrators. Set to null to disable.
       enforce_admins: false
       # Prevent merge commits from being pushed to matching branches

.github/workflows/ci-docker-wormhole.yml

@@ -53,5 +53,5 @@ jobs:
             -v "$PWD:$PWD" \
             -w "$PWD" \
             -e AUTO_APPLY_GIT_HOOKS=false \
-            openjdk:8-jdk-alpine \
+            eclipse-temurin:17-jdk-alpine \
             ./gradlew --no-daemon --continue --scan testcontainers:test --tests '*GenericContainerRuleTest'

.github/workflows/ci.yml

@@ -50,9 +50,14 @@ jobs:
     runs-on: ubuntu-22.04
     permissions:
       checks: write
+    strategy:
+      matrix:
+        java: [ '17', '21' ]
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup-build
+        with:
+          java-version: ${{ matrix.java }}
       - name: Build and test with Gradle
         run: |
           ./gradlew :testcontainers:check --no-daemon --continue --scan

.sdkmanrc

@@ -1,3 +1,3 @@
 # Enable auto-env through the sdkman_auto_env config
 # Add key=value pairs of SDKs to use below
-java=8.0.372-tem
+java=17.0.12-tem

build.gradle

@@ -14,7 +14,7 @@ plugins {
     id 'io.franzbecker.gradle-lombok' version '5.0.0'
     id 'com.gradleup.shadow' version '8.3.0'
     id 'me.champeau.gradle.japicmp' version '0.4.3' apply false
-    id 'com.diffplug.spotless' version '6.13.0' apply false
+    id 'com.diffplug.spotless' version '6.22.0' apply false
 }
 
 apply from: "$rootDir/gradle/ci-support.gradle"
@@ -26,6 +26,7 @@ captainHook {
 }
 
 subprojects {
+    apply plugin: 'java'
     apply plugin: 'java-library'
     apply plugin: 'idea'
     apply plugin: 'io.franzbecker.gradle-lombok'
@@ -35,9 +36,17 @@ subprojects {
 
     group = "org.testcontainers"
 
-    sourceCompatibility = 1.8
-    targetCompatibility = 1.8
-    compileJava.options.encoding = 'UTF-8'
+    java {
+        toolchain {
+            languageVersion = JavaLanguageVersion.of(17)
+        }
+    }
+
+    tasks.withType(JavaCompile) {
+        options.release.set(8)
+        options.encoding = 'UTF-8'
+    }
+
     compileTestJava.options.encoding = 'UTF-8'
     javadoc.options.encoding = 'UTF-8'
 
@@ -126,7 +135,7 @@ subprojects {
     }
 
     checkstyle {
-        toolVersion = "9.3"
+        toolVersion = "10.12.4"
         configFile = rootProject.file('config/checkstyle/checkstyle.xml')
     }
 }

core/src/main/java/org/testcontainers/containers/DockerCompose.java

@@ -4,6 +4,7 @@
 
 interface DockerCompose {
     String ENV_PROJECT_NAME = "COMPOSE_PROJECT_NAME";
+
     String ENV_COMPOSE_FILE = "COMPOSE_FILE";
 
     DockerCompose withCommand(String cmd);

core/src/main/java/org/testcontainers/images/builder/Transferable.java

@@ -10,6 +10,7 @@
 
 public interface Transferable {
     int DEFAULT_FILE_MODE = 0100644;
+
     int DEFAULT_DIR_MODE = 040755;
 
     static Transferable of(String string) {

core/src/test/java/org/testcontainers/TestImages.java

@@ -4,9 +4,14 @@
 
 public interface TestImages {
     DockerImageName REDIS_IMAGE = DockerImageName.parse("redis:6-alpine");
+
     DockerImageName RABBITMQ_IMAGE = DockerImageName.parse("rabbitmq:3.7.25");
+
     DockerImageName MONGODB_IMAGE = DockerImageName.parse("mongo:4.4");
+
     DockerImageName ALPINE_IMAGE = DockerImageName.parse("alpine:3.17");
+
     DockerImageName DOCKER_REGISTRY_IMAGE = DockerImageName.parse("registry:2.7.0");
+
     DockerImageName TINY_IMAGE = DockerImageName.parse("alpine:3.17");
 }