7467: File Put Contents file with empty content.

Author: nmalevanec

dev/tests/integration/testsuite/Magento/Framework/Filesystem/Driver/FileTest.php

@@ -7,7 +7,10 @@
  */
 namespace Magento\Framework\Filesystem\Driver;
 
-use Magento\Framework\Filesystem\DriverInterface;
+use Magento\Framework\App\Filesystem\DirectoryList;
+use Magento\Framework\Filesystem;
+use Magento\Framework\Filesystem\Directory\WriteInterface;
+use Magento\TestFramework\Helper\Bootstrap;
 
 class FileTest extends \PHPUnit\Framework\TestCase
 {
@@ -80,4 +83,44 @@ public function testCreateDirectory()
         $this->assertTrue($this->driver->createDirectory($generatedPath));
         $this->assertTrue(is_dir($generatedPath));
     }
+
+    /**
+     * Check, driver can create file with content or without one.
+     *
+     * @dataProvider createFileDataProvider
+     * @param int $result
+     * @param string $fileName
+     * @param string $fileContent
+     * @return void
+     * @throws \Magento\Framework\Exception\FileSystemException
+     */
+    public function testCreateFile(int $result, string $fileName, string $fileContent)
+    {
+        /** @var WriteInterface $directory */
+        $directory = Bootstrap::getObjectManager()->get(Filesystem::class)->getDirectoryWrite(DirectoryList::VAR_DIR);
+        $filePath = $directory->getAbsolutePath() . '/' . $fileName;
+        $this->assertSame($result, $this->driver->filePutContents($filePath, $fileContent));
+        $this->assertTrue($this->driver->deleteFile($filePath));
+    }
+
+    /**
+     * Provides test data for testCreateFile().
+     *
+     * @return array
+     */
+    public function createFileDataProvider()
+    {
+        return [
+            'file_with_content' => [
+                'result' => 11,
+                'fileName' => 'test.txt',
+                'fileContent' => 'testContent',
+            ],
+            'empty_file' => [
+                'result' => 0,
+                'filePath' => 'test.txt',
+                'fileContent' => '',
+            ]
+        ];
+    }
 }

lib/internal/Magento/Framework/Filesystem/Driver/File.php

@@ -528,7 +528,7 @@ public function touch($path, $modificationTime = null)
     public function filePutContents($path, $content, $mode = null)
     {
         $result = @file_put_contents($this->getScheme() . $path, $content, $mode);
-        if (!$result) {
+        if ($result === false) {
             throw new FileSystemException(
                 new \Magento\Framework\Phrase(
                     'The specified "%1" file could not be written %2',