Beautify SuggestSearchTests.

SuggestSearchTests had tons of duplicate code and didn't use all of the
fancy new integration test helper method.  I've removed a ton of duplicate
code and used as many of the nice test helper method I could think of.

Closes #3611

src/main/java/org/elasticsearch/search/suggest/phrase/PhraseSuggestionBuilder.java

@@ -18,19 +18,15 @@
  */
 package org.elasticsearch.search.suggest.phrase;
 
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
-
 import org.elasticsearch.ElasticSearchIllegalArgumentException;
 import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.search.suggest.SuggestBuilder.SuggestionBuilder;
 
+import java.io.IOException;
+import java.util.*;
+import java.util.Map.Entry;
+
 /**
  * Defines the actual suggest command for phrase suggestions ( <tt>phrase</tt>).
  */
@@ -126,6 +122,14 @@ public final class PhraseSuggestionBuilder extends SuggestionBuilder<PhraseSugge
         return this;
     }
 
+    /**
+     * Clear the candidate generators.
+     */
+    public PhraseSuggestionBuilder clearCandidateGenerators() {
+        this.generators.clear();
+        return this;
+    }
+    
     /**
      * If set to <code>true</code> the phrase suggester will fail if the analyzer only
      * produces ngrams. the default it <code>true</code>.
@@ -154,8 +158,8 @@ public final class PhraseSuggestionBuilder extends SuggestionBuilder<PhraseSugge
      * is returned with suggestions wrapping changed tokens with preTag and postTag.
      */
     public PhraseSuggestionBuilder highlight(String preTag, String postTag) {
-        if (preTag == null || postTag == null) {
+        if ((preTag == null) != (postTag == null)) {
-            throw new ElasticSearchIllegalArgumentException("Pre and post tag must not be null.");
+            throw new ElasticSearchIllegalArgumentException("Pre and post tag must both be null or both not be null.");
         }
         this.preTag = preTag;
         this.postTag = postTag;

src/test/java/org/elasticsearch/test/hamcrest/ElasticsearchAssertions.java

@@ -179,6 +179,23 @@ public class ElasticsearchAssertions {
         assertThat(searchSuggest.getSuggestion(key).getEntries().get(entry).getOptions().get(ord).getText().string(), equalTo(text));
     }
 
+    /**
+     * Assert suggestion returns exactly the provided text.
+     */
+    public static void assertSuggestion(Suggest searchSuggest, int entry, String key, String... text) {
+        assertSuggestion(searchSuggest, entry, key, text.length, text);
+    }
+
+    /**
+     * Assert suggestion returns size suggestions and the first are the provided text.
+     */
+    public static void assertSuggestion(Suggest searchSuggest, int entry, String key, int size, String... text) {
+        assertSuggestionSize(searchSuggest, entry, size, key);
+        for( int i = 0; i < text.length; i++) {
+            assertSuggestion(searchSuggest, entry, i, key, text[i]);
+        }
+    }
+
     /*
      * matchers
      */

src/test/java/org/elasticsearch/test/integration/AbstractSharedClusterTest.java

@@ -217,8 +217,24 @@ public abstract class AbstractSharedClusterTest extends ElasticsearchTestCase {
 
     public CreateIndexRequestBuilder addMapping(CreateIndexRequestBuilder builder, String type, Object[]... mapping) throws IOException {
         XContentBuilder mappingBuilder = jsonBuilder();
-        mappingBuilder.startObject().startObject(type).startObject("properties");
+        mappingBuilder.startObject().startObject(type);
         for (Object[] objects : mapping) {
+            if (!objects[0].toString().equals("_all")) {
+                continue;
+            }
+            mappingBuilder.startObject("_all");
+            for (int i = 1; i < objects.length; i++) {
+                String name = objects[i++].toString();
+                Object value = objects[i];
+                mappingBuilder.field(name, value);
+            }
+            mappingBuilder.endObject();
+        }
+        mappingBuilder.startObject("properties");
+        for (Object[] objects : mapping) {
+            if (objects[0].toString().equals("_all")) {
+                continue;
+            }
             mappingBuilder.startObject(objects[0].toString());
             for (int i = 1; i < objects.length; i++) {
                 String name = objects[i++].toString();
@@ -323,7 +339,7 @@ public abstract class AbstractSharedClusterTest extends ElasticsearchTestCase {
         return client().prepareIndex(index, type).setSource(source).execute().actionGet();
     }
 
-    protected IndexResponse index(String index, String type, String id, Map<String, Object> source) {
+    protected IndexResponse index(String index, String type, String id, Map<String, ? extends Object> source) {
         return client().prepareIndex(index, type, id).setSource(source).execute().actionGet();
     }
 
@@ -336,8 +352,8 @@ public abstract class AbstractSharedClusterTest extends ElasticsearchTestCase {
         return client().prepareIndex(index, type, id).setSource(source).execute().actionGet();
     }
 
-    protected IndexResponse index(String index, String type, String id, String field, Object value) {
+    protected IndexResponse index(String index, String type, String id, Object... source) {
-        return client().prepareIndex(index, type, id).setSource(field, value).execute().actionGet();
+        return client().prepareIndex(index, type, id).setSource(source).execute().actionGet();
     }
 
     protected RefreshResponse refresh() {