added a mechanism to run test without a Jenkins instance

test/src/main/java/org/jvnet/hudson/test/HudsonTestCase.java

@@ -300,6 +300,10 @@ public abstract class HudsonTestCase extends TestCase implements RootAction {
     protected void  setUp() throws Exception {
         env.pin();
         recipe();
+        for (Runner r : recipes) {
+            if (r instanceof WithoutJenkins.RunnerImpl)
+                return; // no setup
+        }
         AbstractProject.WORKSPACE.toString();
         User.clear();
 
@@ -404,11 +408,13 @@ public abstract class HudsonTestCase extends TestCase implements RootAction {
             }
 
         } finally {
-            server.stop();
+            if (server!=null)
+                server.stop();
             for (LenientRunnable r : tearDowns)
                 r.run();
 
-            jenkins.cleanUp();
+            if (jenkins!=null)
+                jenkins.cleanUp();
             env.dispose();
             ExtensionList.clearLegacyInstances();
             DescriptorExtensionList.clearLegacyInstances();

test/src/main/java/org/jvnet/hudson/test/WithoutJenkins.java

 package org.jvnet.hudson.test;
 
+import org.apache.commons.io.FileUtils;
+import org.jvnet.hudson.test.recipes.Recipe;
+import org.jvnet.hudson.test.recipes.WithPlugin;
+
+import java.io.File;
 import java.lang.annotation.Documented;
 import java.lang.annotation.Retention;
 import java.lang.annotation.Target;
+import java.net.URL;
 
 import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
 import static java.lang.annotation.ElementType.METHOD;
 import static java.lang.annotation.RetentionPolicy.RUNTIME;
 
 /**
- * An annotation for test methods that do not require the {@link JenkinsRule} to create and tear down the jenkins
+ * An annotation for test methods that do not require the {@link JenkinsRule}/{@link HudsonTestCase} to create and tear down the jenkins
  * instance.
  */
 @Retention(RUNTIME)
 @Documented
 @Target(METHOD)
+@Recipe(WithoutJenkins.RunnerImpl.class)
 public @interface WithoutJenkins {
+    class RunnerImpl extends Recipe.Runner<WithPlugin> {
+        // bogus. this recipe is handled differently by HudsonTestCase
+    }
 }