PHPLIB-63: Empty input to createIndexes() is a NOP

src/Collection.php

@@ -290,6 +290,10 @@ class Collection
      */
     public function createIndexes(array $indexes)
     {
+        if (empty($indexes)) {
+            return array();
+        }
+
         foreach ($indexes as $i => $index) {
             if ( ! is_array($index)) {
                 throw new UnexpectedTypeException($index, 'array');

tests/CollectionFunctionalTest.php

@@ -132,6 +132,11 @@ class CollectionFunctionalTest extends FunctionalTestCase
         });
     }
 
+    public function testCreateIndexesWithEmptyInputIsNop()
+    {
+        $this->assertSame(array(), $this->collection->createIndexes(array()));
+    }
+
     public function testDropIndex()
     {
         $this->assertSame('x_1', $this->collection->createIndex(array('x' => 1)));