def test_nowhere_leningrad(self): self.assertIs(reachable_destination('', 'LED'), False)
def test_gatwick_leningrad(self): self.assertIs(reachable_destination('LGW', 'LED'), True)
def test_nowhere_nowhere(self): self.assertIs(reachable_destination('', ''), False)
def test_heathrow_lunarcity7(self): self.assertIs(reachable_destination('LHR', 'LC7'), False)
def test_seattle_manchester(self): self.assertIs(reachable_destination('SEA', 'MAN'), True)
def test_stanstead_leningrad(self): self.assertIs(reachable_destination('STD', 'LED'), False)
def test_stanstead_leningrad(self): self.assertIs(reachable_destination('STD','LED'), False)
def test_stanstead_toronto(self): self.assertIs(reachable_destination('YYZ','LED'), False)
def test_heathrow_leningrad(self): self.assertIs(reachable_destination('LHR','LED'), False)
def test_manchester_leningrad(self): self.assertIs(reachable_destination('MAN', 'LED'), True)
def test_leedsbradford_lunarcity7(self): self.assertIs(reachable_destination('LBA', 'LC7'), False)
def test_heathrow_leningrad(self): self.assertIs(reachable_destination('LHR', 'LED'), False)
def test_stanstead_toronto(self): self.assertIs(reachable_destination('YYZ', 'LED'), False)
def test_manchester_lunarcity7(self): self.assertIs(reachable_destination('MAN','LC7'), True)
def test_manchester_lunarcity7(self): self.assertIs(reachable_destination('MAN', 'LC7'), True)
def test_heathrow_nowhere(self): self.assertIs(reachable_destination('LHR', ''), False)
def test_toronto_leningrad(self): self.assertIs(reachable_destination('YYZ', 'LED'), False)