PHPLIB-297 Support maxTimeMS option for DropIndexes operation (#434)

* PHPLIB-297 Support maxTimeMS option for DropIndexes operation

docs/includes/apiargs-MongoDBCollection-method-dropIndex-option.yaml

+source:
+  file: apiargs-common-option.yaml
+  ref: maxTimeMS
+---
 source:
   file: apiargs-MongoDBCollection-common-option.yaml
   ref: typeMap

docs/includes/apiargs-MongoDBCollection-method-dropIndexes-option.yaml

+source:
+  file: apiargs-common-option.yaml
+  ref: maxTimeMS
+---
 source:
   file: apiargs-MongoDBCollection-common-option.yaml
   ref: typeMap

src/Operation/DropIndexes.php

@@ -45,6 +45,9 @@ class DropIndexes implements Executable
      *
      * Supported options:
      *
+     *  * maxTimeMS (integer): The maximum amount of time to allow the query to
+     *    run.
+     *
      *  * typeMap (array): Type map for BSON deserialization. This will be used
      *    for the returned command result document.
      *
@@ -67,6 +70,10 @@ class DropIndexes implements Executable
             throw new InvalidArgumentException('$indexName cannot be empty');
         }
 
+        if (isset($options['maxTimeMS']) && ! is_integer($options['maxTimeMS'])) {
+            throw InvalidArgumentException::invalidType('"maxTimeMS" option', $options['maxTimeMS'], 'integer');
+        }
+
         if (isset($options['typeMap']) && ! is_array($options['typeMap'])) {
             throw InvalidArgumentException::invalidType('"typeMap" option', $options['typeMap'], 'array');
         }
@@ -121,6 +128,10 @@ class DropIndexes implements Executable
             'index' => $this->indexName,
         ];
 
+        if (isset($this->options['maxTimeMS'])) {
+            $cmd['maxTimeMS'] = $this->options['maxTimeMS'];
+        }
+
         if (isset($this->options['writeConcern'])) {
             $cmd['writeConcern'] = \MongoDB\write_concern_as_document($this->options['writeConcern']);
         }

tests/Operation/DropIndexesTest.php

@@ -27,6 +27,10 @@ class DropIndexesTest extends TestCase
     {
         $options = [];
 
+        foreach ($this->getInvalidIntegerValues() as $value) {
+            $options[][] = ['maxTimeMS' => $value];
+        }
+
         foreach ($this->getInvalidArrayValues() as $value) {
             $options[][] = ['typeMap' => $value];
         }