Marvel: Add integration test

Closes elastic/elasticsearch#314

Original commit: elastic/x-pack-elasticsearch@9c5d3ab862

marvel/pom.xml

@@ -17,8 +17,8 @@
 
     <properties>
         <elasticsearch.integ.antfile>dev-tools/integration-tests.xml</elasticsearch.integ.antfile>
-        <!-- FIXME add a integration test -->
-        <skip.integ.tests>true</skip.integ.tests>
+        <tests.rest.suite>marvel</tests.rest.suite>
+        <tests.rest.load_packaged>false</tests.rest.load_packaged>
     </properties>
 
     <dependencies>

marvel/rest-api-spec/test/marvel/10_basic.yaml

@@ -0,0 +1,16 @@
+# Integration tests for Marvel plugin
+#
+"Marvel loaded":
+    - do:
+        cluster.state: {}
+
+    # Get master node id
+    - set: { master_node: master }
+
+    - do:
+        nodes.info: {}
+
+    - match:  { nodes.$master.plugins.0.name: license  }
+    - match:  { nodes.$master.plugins.0.jvm: true  }
+    - match:  { nodes.$master.plugins.1.name: marvel  }
+    - match:  { nodes.$master.plugins.1.jvm: true  }

marvel/src/test/java/org/elasticsearch/marvel/MarvelRestIT.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+package org.elasticsearch.marvel;
+
+import com.carrotsearch.randomizedtesting.annotations.Name;
+import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;
+import org.elasticsearch.test.rest.ElasticsearchRestTestCase;
+import org.elasticsearch.test.rest.RestTestCandidate;
+import org.elasticsearch.test.rest.parser.RestTestParseException;
+
+import java.io.IOException;
+
+public class MarvelRestIT extends ElasticsearchRestTestCase {
+
+    public MarvelRestIT(@Name("yaml") RestTestCandidate testCandidate) {
+        super(testCandidate);
+    }
+
+    @ParametersFactory
+    public static Iterable<Object[]> parameters() throws IOException, RestTestParseException {
+        return ElasticsearchRestTestCase.createParameters(0, 1);
+    }
+}
+