import unittest
import yaml
import config.tap as tap

class TestTAPMethods(unittest.TestCase):
    def setUp(self):
        with open("unittest/test_tap.yaml", "r") as f:
            self.cfg = yaml.load(f, Loader = yaml.FullLoader)

    def test_get_by_name(self):
        ifname, iface = tap.get_by_name(self.cfg, "tap0")
        self.assertIsNotNone(iface)
        self.assertEqual("tap0", ifname)

        ifname, iface = tap.get_by_name(self.cfg, "tap-noexist")
        self.assertIsNone(ifname)
        self.assertIsNone(iface)

    def test_is_tap(self):
        self.assertTrue(tap.is_tap(self.cfg, "tap0"))
        self.assertTrue(tap.is_tap(self.cfg, "tap1"))
        self.assertFalse(tap.is_tap(self.cfg, "tap-noexist"))

    def test_is_host_name_unique(self):
        self.assertTrue(tap.is_host_name_unique(self.cfg, "tap0"))
        self.assertTrue(tap.is_host_name_unique(self.cfg, "tap1"))
        self.assertTrue(tap.is_host_name_unique(self.cfg, "tap-noexist"))
        self.assertFalse(tap.is_host_name_unique(self.cfg, "vpp-tap"))

    def test_enumerators(self):
        ifs = tap.get_taps(self.cfg)
        self.assertEqual(len(ifs), 4)
        self.assertIn("tap0", ifs)
        self.assertIn("tap1", ifs)
        self.assertNotIn("tap-noexist", ifs)