PHPLIB-272: Implement chunkSizeBytes accessor for Bucket class

docs/reference/class/MongoDBGridFSBucket.txt

@@ -42,6 +42,7 @@ Methods
    /reference/method/MongoDBGridFSBucket-find
    /reference/method/MongoDBGridFSBucket-findOne
    /reference/method/MongoDBGridFSBucket-getBucketName
+   /reference/method/MongoDBGridFSBucket-getChunkSizeBytes
    /reference/method/MongoDBGridFSBucket-getDatabaseName
    /reference/method/MongoDBGridFSBucket-getFileDocumentForStream
    /reference/method/MongoDBGridFSBucket-getFileIdForStream

docs/reference/method/MongoDBGridFSBucket-getChunkSizeBytes.txt

+============================================
+MongoDB\\GridFS\\Bucket::getChunkSizeBytes()
+============================================
+
+.. default-domain:: mongodb
+
+.. contents:: On this page
+   :local:
+   :backlinks: none
+   :depth: 1
+   :class: singlecol
+
+Definition
+----------
+
+.. phpmethod:: MongoDB\\GridFS\\Bucket::getChunkSizeBytes()
+
+   Returns the chunk size of this bucket in bytes.
+
+   .. code-block:: php
+
+      function getChunkSizeBytes(): integer
+
+Return Values
+-------------
+
+The chunk size of this bucket in bytes.
+
+.. todo: add examples

src/GridFS/Bucket.php

@@ -278,6 +278,16 @@ class Bucket
         return $this->bucketName;
     }
 
+    /**
+     * Return the chunk size in bytes.
+     *
+     * @return integer
+     */
+    public function getChunkSizeBytes()
+    {
+        return $this->chunkSizeBytes;
+    }
+
     /**
      * Return the database name.
      *

tests/GridFS/BucketFunctionalTest.php

@@ -363,6 +363,18 @@ class BucketFunctionalTest extends FunctionalTestCase
         $this->assertEquals('fs', $this->bucket->getBucketName());
     }
 
+    public function testGetChunkSizeBytesWithCustomValue()
+    {
+        $bucket = new Bucket($this->manager, $this->getDatabaseName(), ['chunkSizeBytes' => 8192]);
+
+        $this->assertEquals(8192, $bucket->getChunkSizeBytes());
+    }
+
+    public function testGetChunkSizeBytesWithDefaultValue()
+    {
+        $this->assertEquals(261120, $this->bucket->getChunkSizeBytes());
+    }
+
     public function testGetDatabaseName()
     {
         $this->assertEquals($this->getDatabaseName(), $this->bucket->getDatabaseName());