public function testWriteDefaultCacheExpiry() {
		$File = new File(array('expiry' => '+1 minute'));
		$key = 'default_keykey';
		$data = 'data';
		$time = time() + 60;

		$closure = $File->write($key, $data);
		$this->assertTrue(is_callable($closure));

		$params = compact('key', 'data');
		$result = $closure($File, $params, null);
		$expected = 25;
		$this->assertEqual($expected, $result);

		$this->assertTrue(file_exists(Libraries::get(true, 'resources') . "/tmp/cache/{$key}"));
		$this->assertEqual(
			file_get_contents(Libraries::get(true, 'resources') . "/tmp/cache/{$key}"),
			"{:expiry:{$time}}\ndata"
		);

		$this->assertTrue(unlink(Libraries::get(true, 'resources') . "/tmp/cache/{$key}"));
		$this->assertFalse(file_exists(Libraries::get(true, 'resources') . "/tmp/cache/{$key}"));
	}