Set up CI with JDK 18

Closes gh-30104

ci/images/ci-image-jdk18/Dockerfile

@@ -0,0 +1,12 @@
+FROM ubuntu:focal-20220113
+
+ADD setup.sh /setup.sh
+ADD get-jdk-url.sh /get-jdk-url.sh
+ADD get-docker-url.sh /get-docker-url.sh
+RUN ./setup.sh java8 java18
+
+ENV JAVA_HOME /opt/openjdk
+ENV PATH $JAVA_HOME/bin:$PATH
+ADD docker-lib.sh /docker-lib.sh
+
+ENTRYPOINT [ "switch", "shell=/bin/bash", "--", "codep", "/bin/docker daemon" ]

ci/images/get-jdk-url.sh

@@ -11,6 +11,9 @@ case "$1" in
 	java17)
 		 echo "https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17.0.2%2B8/OpenJDK17U-jdk_x64_linux_hotspot_17.0.2_8.tar.gz"
 	;;
+	java18)
+		 echo "https://github.com/adoptium/temurin18-binaries/releases/download/jdk18-2022-02-15-13-13-beta/OpenJDK18-jdk_x64_linux_hotspot_2022-02-15-13-13.tar.gz"
+	;;
   *)
 		echo $"Unknown java version"
 		exit 1

ci/pipeline.yml

@@ -175,6 +175,12 @@ resources:
   source:
     <<: *registry-image-resource-source
     repository: ((docker-hub-organization))/spring-boot-ci-jdk17
+- name: ci-image-jdk18
+  type: registry-image
+  icon: docker
+  source:
+    <<: *registry-image-resource-source
+    repository: ((docker-hub-organization))/spring-boot-ci-jdk18
 - name: artifactory-repo
   type: artifactory-resource
   icon: package-variant
@@ -207,6 +213,14 @@ resources:
     access_token: ((github-ci-status-token))
     branch: ((branch))
     context: jdk17-build
+- name: repo-status-jdk18-build
+  type: github-status-resource
+  icon: eye-check-outline
+  source:
+    repository: ((github-repo-name))
+    access_token: ((github-ci-status-token))
+    branch: ((branch))
+    context: jdk18-build
 - name: slack-alert
   type: slack-notification
   icon: slack
@@ -259,6 +273,14 @@ jobs:
       vars:
         ci-image-name: ci-image-jdk17
         <<: *docker-hub-mirror-vars
+    - task: build-ci-image-jdk18
+      privileged: true
+      file: git-repo/ci/tasks/build-ci-image.yml
+      output_mapping:
+        image: ci-image-jdk18
+      vars:
+        ci-image-name: ci-image-jdk18
+        <<: *docker-hub-mirror-vars
   - in_parallel:
     - put: ci-image
       params:
@@ -269,6 +291,9 @@ jobs:
     - put: ci-image-jdk17
       params:
         image: ci-image-jdk17/image.tar
+    - put: ci-image-jdk18
+      params:
+        image: ci-image-jdk18/image.tar
 - name: detect-jdk-updates
   plan:
   - get: git-repo
@@ -294,6 +319,12 @@ jobs:
       params:
         <<: *github-task-params
         JDK_VERSION: java17
+    - task: detect-jdk18-update
+      image: ci-image
+      file: git-repo/ci/tasks/detect-jdk-updates.yml
+      params:
+        <<: *github-task-params
+        JDK_VERSION: java18
 - name: detect-ubuntu-image-updates
   plan:
   - get: git-repo
@@ -438,6 +469,38 @@ jobs:
     - put: slack-alert
       params:
         <<: *slack-success-params
+- name: jdk18-build
+  serial: true
+  public: true
+  plan:
+    - get: ci-image-jdk18
+    - get: git-repo
+      trigger: true
+    - put: repo-status-jdk18-build
+      params: { state: "pending", commit: "git-repo" }
+    - do:
+        - task: build-project
+          image: ci-image-jdk18
+          privileged: true
+          timeout: ((task-timeout))
+          file: git-repo/ci/tasks/build-project.yml
+          params:
+            BRANCH: ((branch))
+            TOOLCHAIN_JAVA_VERSION: 18
+            <<: *gradle-enterprise-task-params
+            <<: *docker-hub-task-params
+      on_failure:
+        do:
+          - put: repo-status-jdk18-build
+            params: { state: "failure", commit: "git-repo" }
+          - put: slack-alert
+            params:
+              <<: *slack-fail-params
+    - put: repo-status-jdk18-build
+      params: { state: "success", commit: "git-repo" }
+    - put: slack-alert
+      params:
+        <<: *slack-success-params
 - name: windows-build
   serial: true
   plan:
@@ -691,7 +754,7 @@ jobs:
         repository: updated-homebrew-tap-repo
 groups:
 - name: "builds"
-  jobs: ["build", "jdk11-build", "jdk17-build", "windows-build"]
+  jobs: ["build", "jdk11-build", "jdk17-build", "jdk18-build", "windows-build"]
 - name: "releases"
   jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone", "promote-rc", "promote-release", "create-github-release", "publish-gradle-plugin", "publish-to-sdkman", "update-homebrew-tap"]
 - name: "ci-images"

ci/scripts/detect-jdk-updates.sh

@@ -20,6 +20,10 @@ case "$JDK_VERSION" in
 		 BASE_URL="https://api.adoptium.net/v3/assets/feature_releases/17/ga"
 		 ISSUE_TITLE="Upgrade Java 17 version in CI image"
 	;;
+	java18)
+		 BASE_URL="https://api.adoptium.net/v3/assets/feature_releases/18/ea"
+		 ISSUE_TITLE="Upgrade Java 18 version in CI image"
+	;;
 	*)
 		echo $"Unknown java version"
 		exit 1;

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/junit/GradleCompatibilityExtension.java

@@ -47,7 +47,10 @@ final class GradleCompatibilityExtension implements TestTemplateInvocationContex
 
 	static {
 		JavaVersion javaVersion = JavaVersion.current();
-		if (javaVersion.isCompatibleWith(JavaVersion.VERSION_17)) {
+		if (javaVersion.isCompatibleWith(JavaVersion.VERSION_HIGHER)) {
+			GRADLE_VERSIONS = Arrays.asList("7.3.3", "7.4");
+		}
+		else if (javaVersion.isCompatibleWith(JavaVersion.VERSION_17)) {
 			GRADLE_VERSIONS = Arrays.asList("7.2", "7.3.3", "7.4");
 		}
 		else if (javaVersion.isCompatibleWith(JavaVersion.VERSION_16)) {

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/junit/GradleProjectBuilder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -30,7 +30,7 @@ import org.springframework.util.StringUtils;
 /**
  * Helper class to build Gradle {@link Project Projects} for test fixtures. Wraps
  * functionality of Gradle's own {@link ProjectBuilder} in order to workaround an issue on
- * JDK 17.
+ * JDK 17 and 18.
  *
  * @author Christoph Dreis
  * @see <a href="https://github.com/gradle/gradle/issues/16857">Gradle Support JDK 17</a>
@@ -67,7 +67,7 @@ public final class GradleProjectBuilder {
 		if (StringUtils.hasText(this.name)) {
 			builder.withName(this.name);
 		}
-		if (JavaVersion.current() == JavaVersion.VERSION_17) {
+		if (JavaVersion.current().isCompatibleWith(JavaVersion.VERSION_17)) {
 			NativeServices.initialize(userHome);
 			try {
 				ProjectBuilderImpl.getGlobalServices();

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/bind/ArrayBinderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,6 +28,7 @@ import org.springframework.boot.context.properties.source.ConfigurationProperty;
 import org.springframework.boot.context.properties.source.ConfigurationPropertyName;
 import org.springframework.boot.context.properties.source.ConfigurationPropertySource;
 import org.springframework.boot.context.properties.source.MockConfigurationPropertySource;
+import org.springframework.boot.testsupport.classpath.ClassPathOverrides;
 import org.springframework.core.ResolvableType;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -44,6 +45,7 @@ import static org.mockito.Mockito.mock;
  * @author Phillip Webb
  * @author Madhura Bhave
  */
+@ClassPathOverrides({ "org.mockito:mockito-core:4.0.0", "org.mockito:mockito-junit-jupiter:4.0.0" })
 class ArrayBinderTests {
 
 	private static final Bindable<List<Integer>> INTEGER_LIST = Bindable.listOf(Integer.class);

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/bind/BinderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,6 +36,7 @@ import org.springframework.boot.context.properties.source.ConfigurationPropertyN
 import org.springframework.boot.context.properties.source.ConfigurationPropertySource;
 import org.springframework.boot.context.properties.source.ConfigurationPropertySources;
 import org.springframework.boot.context.properties.source.MockConfigurationPropertySource;
+import org.springframework.boot.testsupport.classpath.ClassPathOverrides;
 import org.springframework.core.annotation.AnnotationUtils;
 import org.springframework.core.convert.ConversionFailedException;
 import org.springframework.core.env.MapPropertySource;
@@ -63,6 +64,7 @@ import static org.mockito.Mockito.mock;
  * @author Phillip Webb
  * @author Madhura Bhave
  */
+@ClassPathOverrides({ "org.mockito:mockito-core:4.0.0", "org.mockito:mockito-junit-jupiter:4.0.0" })
 class BinderTests {
 
 	private final List<ConfigurationPropertySource> sources = new ArrayList<>();

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/bind/MapBinderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,6 +37,7 @@ import org.springframework.boot.context.properties.source.ConfigurationPropertyN
 import org.springframework.boot.context.properties.source.ConfigurationPropertySource;
 import org.springframework.boot.context.properties.source.MapConfigurationPropertySource;
 import org.springframework.boot.context.properties.source.MockConfigurationPropertySource;
+import org.springframework.boot.testsupport.classpath.ClassPathOverrides;
 import org.springframework.core.ResolvableType;
 import org.springframework.core.convert.converter.Converter;
 import org.springframework.core.convert.support.DefaultConversionService;
@@ -59,6 +60,7 @@ import static org.mockito.Mockito.mock;
  * @author Phillip Webb
  * @author Madhura Bhave
  */
+@ClassPathOverrides({ "org.mockito:mockito-core:4.0.0", "org.mockito:mockito-junit-jupiter:4.0.0" })
 class MapBinderTests {
 
 	private static final Bindable<Map<String, String>> STRING_STRING_MAP = Bindable.mapOf(String.class, String.class);

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/AliasedConfigurationPropertySourceTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,7 +21,10 @@ import java.util.Collections;
 import org.junit.jupiter.api.Test;
 import org.mockito.Answers;
 
+import org.springframework.boot.testsupport.classpath.ClassPathOverrides;
+
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.Mockito.mock;
 
@@ -31,6 +34,7 @@ import static org.mockito.Mockito.mock;
  * @author Phillip Webb
  * @author Madhura Bhave
  */
+@ClassPathOverrides({ "org.mockito:mockito-core:4.0.0", "org.mockito:mockito-junit-jupiter:4.0.0" })
 class AliasedConfigurationPropertySourceTests {
 
 	@Test
@@ -90,7 +94,7 @@ class AliasedConfigurationPropertySourceTests {
 	@Test
 	void containsDescendantOfWhenAnyIsPresentShouldReturnPresent() {
 		ConfigurationPropertyName name = ConfigurationPropertyName.of("foo");
-		ConfigurationPropertySource source = mock(ConfigurationPropertySource.class, Answers.CALLS_REAL_METHODS);
+		ConfigurationPropertySource source = mockConfigurationPropertySource();
 		given(source.containsDescendantOf(name)).willReturn(ConfigurationPropertyState.ABSENT);
 		given(source.containsDescendantOf(ConfigurationPropertyName.of("bar")))
 				.willReturn(ConfigurationPropertyState.PRESENT);
@@ -113,4 +117,10 @@ class AliasedConfigurationPropertySourceTests {
 		return (property != null) ? property.getValue() : null;
 	}
 
+	private ConfigurationPropertySource mockConfigurationPropertySource() {
+		ConfigurationPropertySource mock = mock(ConfigurationPropertySource.class);
+		given(mock.withAliases(any())).willAnswer((invocation) -> invocation.callRealMethod());
+		return mock;
+	}
+
 }

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/AliasedIterableConfigurationPropertySourceTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,6 +18,8 @@ package org.springframework.boot.context.properties.source;
 
 import org.junit.jupiter.api.Test;
 
+import org.springframework.boot.testsupport.classpath.ClassPathOverrides;
+
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
@@ -26,6 +28,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Phillip Webb
  * @author Madhura Bhave
  */
+@ClassPathOverrides({ "org.mockito:mockito-core:4.0.0", "org.mockito:mockito-junit-jupiter:4.0.0" })
 class AliasedIterableConfigurationPropertySourceTests extends AliasedConfigurationPropertySourceTests {
 
 	@Test

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/FilteredConfigurationPropertiesSourceTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,8 @@ import java.util.Objects;
 import org.junit.jupiter.api.Test;
 import org.mockito.Answers;
 
+import org.springframework.boot.testsupport.classpath.ClassPathOverrides;
+
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
 import static org.mockito.BDDMockito.given;
@@ -32,6 +34,7 @@ import static org.mockito.Mockito.mock;
  * @author Phillip Webb
  * @author Madhura Bhave
  */
+@ClassPathOverrides({ "org.mockito:mockito-core:4.0.0", "org.mockito:mockito-junit-jupiter:4.0.0" })
 class FilteredConfigurationPropertiesSourceTests {
 
 	@Test

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/FilteredIterableConfigurationPropertiesSourceTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,6 +18,8 @@ package org.springframework.boot.context.properties.source;
 
 import org.junit.jupiter.api.Test;
 
+import org.springframework.boot.testsupport.classpath.ClassPathOverrides;
+
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
@@ -26,6 +28,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Phillip Webb
  * @author Madhura Bhave
  */
+@ClassPathOverrides({ "org.mockito:mockito-core:4.0.0", "org.mockito:mockito-junit-jupiter:4.0.0" })
 class FilteredIterableConfigurationPropertiesSourceTests extends FilteredConfigurationPropertiesSourceTests {
 
 	@Test

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/PrefixedConfigurationPropertySourceTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,6 +19,8 @@ package org.springframework.boot.context.properties.source;
 import org.junit.jupiter.api.Test;
 import org.mockito.Answers;
 
+import org.springframework.boot.testsupport.classpath.ClassPathOverrides;
+
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.Mockito.mock;
@@ -28,6 +30,7 @@ import static org.mockito.Mockito.mock;
  *
  * @author Madhura Bhave
  */
+@ClassPathOverrides({ "org.mockito:mockito-core:4.0.0", "org.mockito:mockito-junit-jupiter:4.0.0" })
 class PrefixedConfigurationPropertySourceTests {
 
 	@Test