public function testApiAppend_AppendsToFile_WhenNodeIsFile()
{
$test = $this->getTest();
$fs = $this->createFilesystem();
$dest = $this->getPrefixed('FILE_A');
$before = 'FILE_A_TEXT';
$after = 'FILE_A_NEW_TEXT';
$test->assertTrue($fs->exists($dest));
$test->assertSame($before, $fs->read($dest));
$fs->append($dest, $after);
$test->assertTrue($fs->exists($dest));
$test->assertSame($before . $after, $fs->read($dest));
}