[Test] Add highlighting test

Closes elastic#108.

(cherry picked from commit 2c96550)
(cherry picked from commit 440e534)

Author: dadoonet

src/test/java/org/elasticsearch/plugin/mapper/attachments/test/HighlightAttachmentIntegrationTests.java

@@ -0,0 +1,86 @@
+/*
+ * 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.plugin.mapper.attachments.test;
+
+import org.elasticsearch.action.search.SearchResponse;
+import org.elasticsearch.common.settings.ImmutableSettings;
+import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.text.Text;
+import org.elasticsearch.plugins.PluginsService;
+import org.elasticsearch.search.highlight.HighlightField;
+import org.elasticsearch.test.ElasticsearchIntegrationTest;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.elasticsearch.client.Requests.putMappingRequest;
+import static org.elasticsearch.common.io.Streams.copyToBytesFromClasspath;
+import static org.elasticsearch.common.io.Streams.copyToStringFromClasspath;
+import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
+import static org.elasticsearch.index.query.QueryBuilders.matchQuery;
+import static org.hamcrest.Matchers.*;
+
+/**
+ *
+ */
+@ElasticsearchIntegrationTest.ClusterScope(scope = ElasticsearchIntegrationTest.Scope.SUITE)
+public class HighlightAttachmentIntegrationTests extends ElasticsearchIntegrationTest {
+
+    @Override
+    protected Settings nodeSettings(int nodeOrdinal) {
+        return ImmutableSettings.builder()
+                .put(super.nodeSettings(nodeOrdinal))
+                .put("plugins." + PluginsService.LOAD_PLUGIN_FROM_CLASSPATH, true)
+                .build();
+    }
+
+    @Before
+    public void createEmptyIndex() throws Exception {
+        logger.info("creating index [test]");
+        createIndex("test");
+    }
+
+    @Test
+    public void testHighlightAttachment() throws Exception {
+        String mapping = copyToStringFromClasspath("/org/elasticsearch/index/mapper/xcontent/test-highlight-mapping.json");
+        byte[] html = copyToBytesFromClasspath("/org/elasticsearch/index/mapper/xcontent/testXHTML.html");
+
+        client().admin().indices().putMapping(putMappingRequest("test").type("person").source(mapping)).actionGet();
+
+        index("test", "person", jsonBuilder().startObject().field("file", html).endObject());
+        refresh();
+
+        SearchResponse searchResponse = client().prepareSearch("test")
+                .setQuery(matchQuery("file", "apache tika"))
+                .addHighlightedField("file")
+                .setNoFields().get();
+
+        logger.info("{}", searchResponse);
+        assertThat(searchResponse.getHits().getTotalHits(), equalTo(1l));
+        assertThat(searchResponse.getHits().getAt(0).getHighlightFields(), notNullValue());
+        assertThat(searchResponse.getHits().getAt(0).getHighlightFields().keySet(), contains("file"));
+        searchResponse.getHits().getAt(0).getHighlightFields();
+        for (HighlightField highlightField : searchResponse.getHits().getAt(0).getHighlightFields().values()) {
+            for (Text fragment : highlightField.getFragments()) {
+                assertThat(fragment.string(), containsString("<em>Apache</em>"));
+                assertThat(fragment.string(), containsString("<em>Tika</em>"));
+            }
+        }
+    }
+}

src/test/resources/org/elasticsearch/index/mapper/xcontent/test-highlight-mapping.json

@@ -0,0 +1,16 @@
+{
+  "person":{
+    "properties":{
+      "file":{
+        "type":"attachment",
+        "fields": {
+          "file" : {
+            "type": "string",
+            "store" : "yes",
+            "term_vector": "with_positions_offsets"
+          }
+        }
+      }
+    }
+  }
+}