PHPLIB-245: Require chunkSizeBytes to be a positive integer

src/GridFS/Bucket.php

@@ -80,6 +80,10 @@ class Bucket
             throw InvalidArgumentException::invalidType('"chunkSizeBytes" option', $options['chunkSizeBytes'], 'integer');
         }
 
+        if (isset($options['chunkSizeBytes']) && $options['chunkSizeBytes'] < 1) {
+            throw new InvalidArgumentException(sprintf('Expected "chunkSizeBytes" option to be >= 1, %d given', $options['chunkSizeBytes']));
+        }
+
         if (isset($options['readConcern']) && ! $options['readConcern'] instanceof ReadConcern) {
             throw InvalidArgumentException::invalidType('"readConcern" option', $options['readConcern'], 'MongoDB\Driver\ReadConcern');
         }

src/GridFS/WritableStream.php

@@ -67,6 +67,10 @@ class WritableStream
             throw InvalidArgumentException::invalidType('"chunkSizeBytes" option', $options['chunkSizeBytes'], 'integer');
         }
 
+        if (isset($options['chunkSizeBytes']) && $options['chunkSizeBytes'] < 1) {
+            throw new InvalidArgumentException(sprintf('Expected "chunkSizeBytes" option to be >= 1, %d given', $options['chunkSizeBytes']));
+        }
+
         if (isset($options['contentType']) && ! is_string($options['contentType'])) {
             throw InvalidArgumentException::invalidType('"contentType" option', $options['contentType'], 'string');
         }

tests/GridFS/BucketFunctionalTest.php

@@ -68,6 +68,15 @@ class BucketFunctionalTest extends FunctionalTestCase
         return $options;
     }
 
+    /**
+     * @expectedException MongoDB\Exception\InvalidArgumentException
+     * @expectedExceptionMessage Expected "chunkSizeBytes" option to be >= 1, 0 given
+     */
+    public function testConstructorShouldRequireChunkSizeBytesOptionToBePositive()
+    {
+        new Bucket($this->manager, $this->getDatabaseName(), ['chunkSizeBytes' => 0]);
+    }
+
     /**
      * @dataProvider provideInputDataAndExpectedChunks
      */

tests/GridFS/WritableStreamFunctionalTest.php

@@ -52,6 +52,15 @@ class WritableStreamFunctionalTest extends FunctionalTestCase
         return $options;
     }
 
+    /**
+     * @expectedException MongoDB\Exception\InvalidArgumentException
+     * @expectedExceptionMessage Expected "chunkSizeBytes" option to be >= 1, 0 given
+     */
+    public function testConstructorShouldRequireChunkSizeBytesOptionToBePositive()
+    {
+        new WritableStream($this->collectionWrapper, 'filename', ['chunkSizeBytes' => 0]);
+    }
+
     /**
      * @dataProvider provideInputDataAndExpectedMD5
      */