add asserts to debuglink tests

tests/test_debuglink.py

@@ -11,15 +11,15 @@ class TestDebugLink(common.TrezorTest):
 
     def test_layout(self):
         layout = self.client.debuglink.read_layout()
-        print binascii.hexlify(layout)
+        self.assertEqual(len(layout), 1024)
 
     def test_mnemonic(self):
         mnemonic = self.client.debuglink.read_mnemonic()
-        print mnemonic
+        self.assertEqual(mnemonic, self.mnemonic1)
 
     def test_node(self):
         node = self.client.debuglink.read_node()
-        print node
+        self.assertIsNotNone(node)
 
 if __name__ == '__main__':
     unittest.main()

trezorlib/ckd_public.py

@@ -30,7 +30,7 @@ def sec_to_public_pair(pubkey):
         curve = generator.curve()
         p = curve.p()
         alpha = (pow(x, 3, p) + curve.a() * x + curve.b()) % p
-        beta = ecdsa.number_theory.square_root_mod_prime(alpha, p)
+        beta = ecdsa.numbertheory.square_root_mod_prime(alpha, p)
         if is_even == bool(beta & 1):
             return (x, p - beta)
         return (x, beta)