Add demo for the NodeJS plugin (#1153)

* Add demo for NodeJS

* Add integration test for NodeJS

* Fix build

* Fix readme file extension case

demos/nodejs/README.md

@@ -0,0 +1,19 @@
+# Configure NodeJS
+
+Basic configuration of [NodeJS](https://plugins.jenkins.io/nodejs)
+
+## Sample configuration
+
+```yaml
+tool:
+  nodejs:
+    installations:
+      - name: "NodeJS Latest"
+        home: "" #required until nodejs-1.3.4 release (JENKINS-57508)
+        properties:
+          - installSource:
+              installers:
+                - nodeJSInstaller:
+                    id: "12.11.1"
+                    npmPackagesRefreshHours: 48 #default is 72
+```

integrations/pom.xml

@@ -406,6 +406,19 @@
       <version>0.50.40</version>
       <scope>test</scope>
     </dependency>
+
+    <dependency>
+      <groupId>org.jenkins-ci.plugins</groupId>
+      <artifactId>nodejs</artifactId>
+      <version>1.3.3</version>
+      <scope>test</scope>
+      <exclusions>
+        <exclusion>
+          <groupId>org.jenkins-ci.plugins</groupId>
+          <artifactId>config-file-provider</artifactId>
+        </exclusion>
+      </exclusions>
+    </dependency>
   </dependencies>
 
   <dependencyManagement>

integrations/src/test/java/io/jenkins/plugins/casc/NodeJSTest.java

@@ -0,0 +1,31 @@
+package io.jenkins.plugins.casc;
+
+import hudson.ExtensionList;
+import hudson.tools.InstallSourceProperty;
+import io.jenkins.plugins.casc.misc.ConfiguredWithReadme;
+import io.jenkins.plugins.casc.misc.JenkinsConfiguredWithReadmeRule;
+import jenkins.plugins.nodejs.tools.NodeJSInstallation;
+import jenkins.plugins.nodejs.tools.NodeJSInstaller;
+import org.junit.Rule;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class NodeJSTest {
+
+    @Rule
+    public JenkinsConfiguredWithReadmeRule j = new JenkinsConfiguredWithReadmeRule();
+
+    @Test
+    @ConfiguredWithReadme("nodejs/README.md")
+    public void configure_nodejs() throws Exception {
+        final NodeJSInstallation.DescriptorImpl descriptor = ExtensionList.lookupSingleton(NodeJSInstallation.DescriptorImpl.class);
+        assertEquals(1, descriptor.getInstallations().length);
+
+        final NodeJSInstallation nodejs = descriptor.getInstallations()[0];
+        final InstallSourceProperty installSourceProperty = nodejs.getProperties().get(InstallSourceProperty.class);
+        final NodeJSInstaller nodeJSInstaller = installSourceProperty.installers.get(NodeJSInstaller.class);
+        assertEquals("12.11.1", nodeJSInstaller.id);
+        assertEquals(48, nodeJSInstaller.getNpmPackagesRefreshHours().longValue());
+    }
+}