+ * 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.federation.resolver;
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/test/java/org/apache/hadoop/yarn/server/federation/resolver/TestDefaultSubClusterResolver.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/test/java/org/apache/hadoop/yarn/server/federation/resolver/TestDefaultSubClusterResolver.java
new file mode 100644
index 00000000000..7396942c6b1
--- /dev/null
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/test/java/org/apache/hadoop/yarn/server/federation/resolver/TestDefaultSubClusterResolver.java
@@ -0,0 +1,184 @@
+/**
+* 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.federation.resolver;
+
+import java.net.URL;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.apache.hadoop.yarn.conf.YarnConfiguration;
+import org.apache.hadoop.yarn.exceptions.YarnException;
+import org.apache.hadoop.yarn.server.federation.store.records.SubClusterId;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test {@link SubClusterResolver} against correct and malformed Federation
+ * machine lists.
+ */
+public class TestDefaultSubClusterResolver {
+ private static YarnConfiguration conf;
+ private static SubClusterResolver resolver;
+
+ public static void setUpGoodFile() {
+ conf = new YarnConfiguration();
+ resolver = new DefaultSubClusterResolverImpl();
+
+ URL url =
+ Thread.currentThread().getContextClassLoader().getResource("nodes");
+ if (url == null) {
+ throw new RuntimeException(
+ "Could not find 'nodes' dummy file in classpath");
+ }
+
+ conf.set(YarnConfiguration.FEDERATION_MACHINE_LIST, url.getPath());
+ resolver.setConf(conf);
+ resolver.load();
+ }
+
+ private void setUpMalformedFile() {
+ conf = new YarnConfiguration();
+ resolver = new DefaultSubClusterResolverImpl();
+
+ URL url = Thread.currentThread().getContextClassLoader()
+ .getResource("nodes-malformed");
+ if (url == null) {
+ throw new RuntimeException(
+ "Could not find 'nodes-malformed' dummy file in classpath");
+ }
+
+ conf.set(YarnConfiguration.FEDERATION_MACHINE_LIST, url.getPath());
+ resolver.setConf(conf);
+ resolver.load();
+ }
+
+ private void setUpNonExistentFile() {
+ conf = new YarnConfiguration();
+ resolver = new DefaultSubClusterResolverImpl();
+
+ conf.set(YarnConfiguration.FEDERATION_MACHINE_LIST, "fileDoesNotExist");
+ resolver.setConf(conf);
+ resolver.load();
+ }
+
+ @Test
+ public void testGetSubClusterForNode() throws YarnException {
+ setUpGoodFile();
+
+ // All lowercase, no whitespace in machine list file
+ Assert.assertEquals(SubClusterId.newInstance("subcluster1"),
+ resolver.getSubClusterForNode("node1"));
+ // Leading and trailing whitespace in machine list file
+ Assert.assertEquals(SubClusterId.newInstance("subcluster2"),
+ resolver.getSubClusterForNode("node2"));
+ // Node name capitalization in machine list file
+ Assert.assertEquals(SubClusterId.newInstance("subcluster3"),
+ resolver.getSubClusterForNode("node3"));
+
+ try {
+ resolver.getSubClusterForNode("nodeDoesNotExist");
+ Assert.fail();
+ } catch (YarnException e) {
+ Assert.assertTrue(
+ e.getMessage().startsWith("Cannot find subClusterId for node"));
+ }
+ }
+
+ @Test
+ public void testGetSubClusterForNodeMalformedFile() throws YarnException {
+ setUpMalformedFile();
+
+ try {
+ resolver.getSubClusterForNode("node1");
+ Assert.fail();
+ } catch (YarnException e) {
+ Assert.assertTrue(
+ e.getMessage().startsWith("Cannot find subClusterId for node"));
+ }
+
+ try {
+ resolver.getSubClusterForNode("node2");
+ Assert.fail();
+ } catch (YarnException e) {
+ Assert.assertTrue(
+ e.getMessage().startsWith("Cannot find subClusterId for node"));
+ }
+
+ Assert.assertEquals(SubClusterId.newInstance("subcluster3"),
+ resolver.getSubClusterForNode("node3"));
+
+ try {
+ resolver.getSubClusterForNode("nodeDoesNotExist");
+ Assert.fail();
+ } catch (YarnException e) {
+ Assert.assertTrue(
+ e.getMessage().startsWith("Cannot find subClusterId for node"));
+ }
+ }
+
+ @Test
+ public void testGetSubClusterForNodeNoFile() throws YarnException {
+ setUpNonExistentFile();
+
+ try {
+ resolver.getSubClusterForNode("node1");
+ Assert.fail();
+ } catch (YarnException e) {
+ Assert.assertTrue(
+ e.getMessage().startsWith("Cannot find subClusterId for node"));
+ }
+ }
+
+ @Test
+ public void testGetSubClustersForRack() throws YarnException {
+ setUpGoodFile();
+
+ Set