from ID2TLib.IPGenerator import IPGenerator
import unittest

class IPGeneratorTestCase(unittest.TestCase):
	IP_GENERATOR = None
	IP_SAMPLES = None
	IP_SAMPLES_NUM = 1000
	
	@classmethod
	def setUpClass(cls):
		cls.IP_GENERATOR = IPGenerator()
		cls.IP_SAMPLES = [cls.IP_GENERATOR.random_ip() for _ in range(cls.IP_SAMPLES_NUM)]
	
	def test_valid_ips(self):
		ip = None
		
		try:
			for ip in self.IP_SAMPLES:
				parts = ip.split(".")
				self.assertTrue(len(parts) == 4)
				
				numbers = [int(i) for i in parts]
				self.assertTrue(all(n in range(256) for n in numbers))
		except:
			self.fail("%s is not a valid IPv4" % ip)
	
	def test_generates_localhost_ip(self):
		self.assertFalse(any(ip.startswith("127.") for ip in self.IP_SAMPLES))
	
	def test_generates_private_ip(self):
		def private_ip(ip):
			private_starts = ["10.", "192.168."] + ["172.%i." % i for i in range(16, 32)]
			return any(ip.startswith(start) for start in private_starts)
		
		self.assertFalse(any(map(private_ip, self.IP_SAMPLES)))
	
	def test_unique_ips(self):
		self.assertTrue(len(self.IP_SAMPLES) == len(set(self.IP_SAMPLES)))
	
	def test_blacklist(self):
		generator = IPGenerator(blacklist = ["42.0.0.0/8"])
		self.assertFalse(any(generator.random_ip().startswith("42.") for _ in range(self.IP_SAMPLES_NUM)))