Add tests on gridfs examples

Author: GromNaN

examples/atlas-search.php renamed to examples/atlas_search.php

@@ -17,9 +17,9 @@
 use function fwrite;
 use function getenv;
 use function rewind;
+use function stream_get_contents;
 
 use const PHP_EOL;
-use const STDOUT;
 
 require __DIR__ . '/../vendor/autoload.php';
 
@@ -38,10 +38,11 @@
 echo 'Inserted file with ID: ' . $id . PHP_EOL;
 fclose($stream);
 
-// Download the file and print the contents directly to STDOUT, chunk by chunk
-echo 'File contents: ';
-$gridfs->downloadToStreamByName('hello.txt', STDOUT);
-echo PHP_EOL;
+// Download the file and print the contents directly to an in-memory stream, chunk by chunk
+$stream = fopen('php://temp', 'w+');
+$gridfs->downloadToStreamByName('hello.txt', $stream);
+rewind($stream);
+echo 'File contents: ' . stream_get_contents($stream) . PHP_EOL;
 
 // Delete the file
 $gridfs->delete($id);

examples/gridfs-stream.php renamed to examples/gridfs_stream.php

@@ -5,7 +5,7 @@
       <code><![CDATA[$clientEncryption->decrypt($document->encryptedField)]]></code>
     </MixedArgument>
   </file>
-  <file src="examples/atlas-search.php">
+  <file src="examples/atlas_search.php">
     <MixedArgument>
       <code><![CDATA[$document['name']]]></code>
       <code><![CDATA[$index->name]]></code>

examples/gridfs-upload.php renamed to examples/gridfs_upload.php

@@ -99,6 +99,26 @@ public static function provideExamples(): Generator
             'expectedOutput' => $expectedOutput,
         ];
 
+        $expectedOutput = <<<'OUTPUT'
+Read a total of 17888890 bytes
+OUTPUT;
+
+        yield 'gridfs_stream' => [
+            'file' => __DIR__ . '/../examples/gridfs_stream.php',
+            'expectedOutput' => $expectedOutput,
+        ];
+
+        $expectedOutput = <<<'OUTPUT'
+Inserted file with ID: %s
+File contents: Hello world!
+
+OUTPUT;
+
+        yield 'gridfs_upload' => [
+            'file' => __DIR__ . '/../examples/gridfs_upload.php',
+            'expectedOutput' => $expectedOutput,
+        ];
+
         $expectedOutput = <<<'OUTPUT'
 File exists: no
 Writing file
@@ -243,7 +263,7 @@ public function testAtlasSearch(): void
 
 OUTPUT;
 
-        $this->assertExampleOutput(__DIR__ . '/../examples/atlas-search.php', $expectedOutput);
+        $this->assertExampleOutput(__DIR__ . '/../examples/atlas_search.php', $expectedOutput);
     }
 
     public function testChangeStream(): void