Add Configuration as Code test + update to Jenkins 2.222.1 as a minimum requirement

pom.xml

@@ -4,14 +4,14 @@
     <parent>
         <groupId>org.jenkins-ci.plugins</groupId>
         <artifactId>plugin</artifactId>
-        <version>3.57</version>
+        <version>4.2</version>
         <relativePath />
     </parent>
     <artifactId>jdk-tool</artifactId>
     <version>1.5-SNAPSHOT</version>
     <packaging>hpi</packaging>
     <properties>
-        <jenkins.version>2.112</jenkins.version>
+        <jenkins.version>2.176.1</jenkins.version>
         <java.level>8</java.level>
     </properties>
     <name>Oracle Java SE Development Kit Installer Plugin</name>
@@ -41,4 +41,27 @@
             <url>https://repo.jenkins-ci.org/public/</url>
         </pluginRepository>
     </pluginRepositories>
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>io.jenkins.tools.bom</groupId>
+                <artifactId>bom-2.176.x</artifactId>
+                <version>11</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+    <dependencies>
+        <dependency>
+            <groupId>io.jenkins</groupId>
+            <artifactId>configuration-as-code</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.jenkins.configuration-as-code</groupId>
+            <artifactId>test-harness</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 </project>

src/test/java/hudson/tools/JDKInstallerCascTest.java

@@ -0,0 +1,34 @@
+package hudson.tools;
+
+import hudson.ExtensionList;
+import hudson.model.JDK;
+import io.jenkins.plugins.casc.misc.ConfiguredWithCode;
+import io.jenkins.plugins.casc.misc.JenkinsConfiguredWithCodeRule;
+import org.junit.Rule;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class JDKInstallerCascTest {
+    @Rule
+    public JenkinsConfiguredWithCodeRule r = new JenkinsConfiguredWithCodeRule();
+
+    @ConfiguredWithCode("casc.yaml")
+    @Test
+    public void configuredByCasC() {
+        final JDK.DescriptorImpl descriptor = ExtensionList.lookupSingleton(JDK.DescriptorImpl.class);
+        assertEquals(1, descriptor.getInstallations().length);
+
+        JDK jdk = descriptor.getInstallations()[0];
+        assertEquals("jdk8", jdk.getName());
+        assertEquals("/jdk", jdk.getHome());
+
+        InstallSourceProperty installSourceProperty = jdk.getProperties().get(InstallSourceProperty.class);
+        assertEquals(1, installSourceProperty.installers.size());
+
+        JDKInstaller installer = installSourceProperty.installers.get(JDKInstaller.class);
+        assertEquals("jdk-8u181-oth-JPR", installer.id);
+        assertTrue(installer.acceptLicense);
+    }
+}

src/test/resources/hudson/tools/casc.yaml

@@ -0,0 +1,11 @@
+tool:
+  jdk:
+    installations:
+      - home: "/jdk"
+        name: "jdk8"
+        properties:
+          - installSource:
+              installers:
+                - jdkInstaller:
+                    acceptLicense: true
+                    id: "jdk-8u181-oth-JPR"