Add MatchNone the inverse of MatchAll (ruflin#1276)

This query is sometimes handy and I think Elastica should support it.

CHANGELOG.md

@@ -16,6 +16,7 @@ All notable changes to this project will be documented in this file based on the
 
 - Added `\Elastica\Client::requestEndpoint`, `\Elastica\Index::requestEndpoint`, `\Elastica\Type::requestEndpoint` that allow make requests with official client Endpoint usage. [#1275](https://github.com/ruflin/Elastica/pull/1275)
 - Added `\Elastica\Aggregation\GeoBounds` that computes the bounding box containing all geo_point values for a field. [#1271](https://github.com/ruflin/Elastica/pull/1271)
+- Added `\Elastica\Query\MatchNone` the inverse of MatchAll.
 
 ### Improvements
 

lib/Elastica/Query/MatchNone.php

@@ -0,0 +1,20 @@
+<?php
+namespace Elastica\Query;
+
+/**
+ * Match none query. Returns no results.
+ *
+ * @author David Causse
+ *
+ * @link https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-match-all-query.html#query-dsl-match-none-query
+ */
+class MatchNone extends AbstractQuery
+{
+    /**
+     * Creates match none query.
+     */
+    public function __construct()
+    {
+        $this->_params = new \stdClass();
+    }
+}

lib/Elastica/QueryBuilder/DSL/Query.php

@@ -16,6 +16,7 @@
 use Elastica\Query\Ids;
 use Elastica\Query\Match;
 use Elastica\Query\MatchAll;
+use Elastica\Query\MatchNone;
 use Elastica\Query\MoreLikeThis;
 use Elastica\Query\MultiMatch;
 use Elastica\Query\Nested;
@@ -237,6 +238,18 @@ public function match_all()
         return new MatchAll();
     }
 
+    /**
+     * match none query.
+     *
+     * @link https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-match-all-query.html#query-dsl-match-none-query
+     *
+     * @return MatchNone
+     */
+    public function match_none()
+    {
+        return new MatchNone();
+    }
+
     /**
      * more like this query.
      *

test/Elastica/Query/MatchNoneTest.php

@@ -0,0 +1,41 @@
+<?php
+namespace Elastica\Test\Query;
+
+use Elastica\Document;
+use Elastica\Query\MatchNone;
+use Elastica\Search;
+use Elastica\Test\Base as BaseTest;
+
+class MatchNoneTest extends BaseTest
+{
+    /**
+     * @group unit
+     */
+    public function testToArray()
+    {
+        $query = new MatchNone();
+
+        $expectedArray = ['match_none' => new \stdClass()];
+
+        $this->assertEquals($expectedArray, $query->toArray());
+    }
+
+    /**
+     * @group functional
+     */
+    public function testMatchNone()
+    {
+        $index = $this->_createIndex();
+        $client = $index->getClient();
+
+        $doc = new Document(1, ['name' => 'ruflin']);
+        $index->getType('test')->addDocument($doc);
+
+        $index->refresh();
+
+        $search = new Search($client);
+        $resultSet = $search->search(new MatchNone());
+
+        $this->assertEquals(0, $resultSet->getTotalHits());
+    }
+}

test/Elastica/QueryBuilder/DSL/QueryTest.php

@@ -48,6 +48,7 @@ public function testInterface()
         $this->_assertImplemented($queryDSL, 'ids', Query\Ids::class, ['type', []]);
         $this->_assertImplemented($queryDSL, 'match', Match::class, ['field', 'values']);
         $this->_assertImplemented($queryDSL, 'match_all', Query\MatchAll::class, []);
+        $this->_assertImplemented($queryDSL, 'match_none', Query\MatchNone::class, []);
         $this->_assertImplemented($queryDSL, 'more_like_this', Query\MoreLikeThis::class, []);
         $this->_assertImplemented($queryDSL, 'multi_match', Query\MultiMatch::class, []);
         $this->_assertImplemented($queryDSL, 'nested', Query\Nested::class, []);