public function testClear() {
		$key = 'key_to_clear';
		$time = time() + 1;
		$path = Libraries::get(true, 'resources') . "/tmp/cache/{$key}";
		file_put_contents($path, "{:expiry:$time}\ndata");

		$result = $this->File->clear();
		$this->assertTrue($result);
		$this->assertFalse(file_exists($path));

		$result = touch(Libraries::get(true, 'resources') . "/tmp/cache/empty");
		$this->assertTrue($result);
	}