org\bovigo\vfs\vfsStreamWrapperFileTestCase::appendContentIfOpenedWithModeA PHP Method

    public function appendContentIfOpenedWithModeA()
    {
        $vfsFile = vfsStream::url('foo/overwrite.txt');
        file_put_contents($vfsFile, 'test');
        $fp = fopen($vfsFile, 'ab');
        fwrite($fp, 'd');
        fclose($fp);
        $this->assertEquals('testd', file_get_contents($vfsFile));
    }