Amending YARN-589. Adding missing file from patch

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1512116 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestRMWebServicesFairScheduler.java

@@ -0,0 +1,118 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.yarn.server.resourcemanager.webapp;
+
+import static org.junit.Assert.assertEquals;
+
+import javax.ws.rs.core.MediaType;
+
+import org.apache.hadoop.yarn.conf.YarnConfiguration;
+import org.apache.hadoop.yarn.server.resourcemanager.MockRM;
+import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
+import org.apache.hadoop.yarn.server.resourcemanager.ResourceManager;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ResourceScheduler;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler;
+import org.apache.hadoop.yarn.server.security.ApplicationACLsManager;
+import org.apache.hadoop.yarn.webapp.GenericExceptionHandler;
+import org.codehaus.jettison.json.JSONException;
+import org.codehaus.jettison.json.JSONObject;
+import org.junit.Test;
+
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import com.google.inject.servlet.GuiceServletContextListener;
+import com.google.inject.servlet.ServletModule;
+import com.sun.jersey.api.client.ClientResponse;
+import com.sun.jersey.api.client.WebResource;
+import com.sun.jersey.guice.spi.container.servlet.GuiceContainer;
+import com.sun.jersey.test.framework.JerseyTest;
+import com.sun.jersey.test.framework.WebAppDescriptor;
+
+public class TestRMWebServicesFairScheduler extends JerseyTest {
+  private static MockRM rm;
+  private YarnConfiguration conf;
+  
+  private Injector injector = Guice.createInjector(new ServletModule() {
+    @Override
+    protected void configureServlets() {
+      bind(JAXBContextResolver.class);
+      bind(RMWebServices.class);
+      bind(GenericExceptionHandler.class);
+      conf = new YarnConfiguration();
+      conf.setClass(YarnConfiguration.RM_SCHEDULER, FairScheduler.class,
+        ResourceScheduler.class);
+      rm = new MockRM(conf);
+      bind(ResourceManager.class).toInstance(rm);
+      bind(RMContext.class).toInstance(rm.getRMContext());
+      bind(ApplicationACLsManager.class).toInstance(
+          rm.getApplicationACLsManager());
+      serve("/*").with(GuiceContainer.class);
+    }
+  });
+  
+  public class GuiceServletConfig extends GuiceServletContextListener {
+
+    @Override
+    protected Injector getInjector() {
+      return injector;
+    }
+  }
+  
+  public TestRMWebServicesFairScheduler() {
+    super(new WebAppDescriptor.Builder(
+        "org.apache.hadoop.yarn.server.resourcemanager.webapp")
+        .contextListenerClass(GuiceServletConfig.class)
+        .filterClass(com.google.inject.servlet.GuiceFilter.class)
+        .contextPath("jersey-guice-filter").servletPath("/").build());
+  }
+  
+  @Test
+  public void testClusterScheduler() throws JSONException, Exception {
+    WebResource r = resource();
+    ClientResponse response = r.path("ws").path("v1").path("cluster")
+        .path("scheduler").accept(MediaType.APPLICATION_JSON)
+        .get(ClientResponse.class);
+    assertEquals(MediaType.APPLICATION_JSON_TYPE, response.getType());
+    JSONObject json = response.getEntity(JSONObject.class);
+    verifyClusterScheduler(json);
+  }
+
+  @Test
+  public void testClusterSchedulerSlash() throws JSONException, Exception {
+    WebResource r = resource();
+    ClientResponse response = r.path("ws").path("v1").path("cluster")
+        .path("scheduler/").accept(MediaType.APPLICATION_JSON)
+        .get(ClientResponse.class);
+    assertEquals(MediaType.APPLICATION_JSON_TYPE, response.getType());
+    JSONObject json = response.getEntity(JSONObject.class);
+    verifyClusterScheduler(json);
+  }
+  
+  private void verifyClusterScheduler(JSONObject json) throws JSONException,
+      Exception {
+    assertEquals("incorrect number of elements", 1, json.length());
+    JSONObject info = json.getJSONObject("scheduler");
+    assertEquals("incorrect number of elements", 1, info.length());
+    info = info.getJSONObject("schedulerInfo");
+    assertEquals("incorrect number of elements", 2, info.length());
+    JSONObject rootQueue = info.getJSONObject("rootQueue");
+    assertEquals("root", rootQueue.getString("queueName"));
+  }
+
+}