Backport RestActionTestCase.

Author: jtibshirani

test/framework/src/main/java/org/elasticsearch/test/rest/RestActionTestCase.java

@@ -0,0 +1,67 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch 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.elasticsearch.test.rest;
+
+import org.elasticsearch.client.node.NodeClient;
+import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.util.concurrent.ThreadContext;
+import org.elasticsearch.indices.breaker.NoneCircuitBreakerService;
+import org.elasticsearch.rest.RestController;
+import org.elasticsearch.rest.RestRequest;
+import org.elasticsearch.test.ESTestCase;
+import org.elasticsearch.usage.UsageService;
+import org.junit.Before;
+
+import java.util.Collections;
+
+import static org.mockito.Mockito.mock;
+
+/**
+ * A common base class for Rest*ActionTests. Provides access to a {@link RestController}
+ * that can be used to register individual REST actions, and test request handling.
+ */
+public abstract class RestActionTestCase extends ESTestCase {
+    private RestController controller;
+
+    @Before
+    public void setUpController() {
+        controller = new RestController(Collections.emptySet(), null,
+            mock(NodeClient.class),
+            new NoneCircuitBreakerService(),
+            new UsageService());
+    }
+
+    /**
+     * A test {@link RestController}. This controller can be used to register and delegate
+     * to handlers, but uses a mock client and cannot carry out the full request.
+     */
+    protected RestController controller() {
+        return controller;
+    }
+
+    /**
+     * Sends the given request to the test controller in {@link #controller()}.
+     */
+    protected void dispatchRequest(RestRequest request) {
+        FakeRestChannel channel = new FakeRestChannel(request, false, 1);
+        ThreadContext threadContext = new ThreadContext(Settings.EMPTY);
+        controller.dispatchRequest(request, channel, threadContext);
+    }
+}