add test for encrypted xprv

tests/test_msg_loaddevice.py

@@ -29,6 +29,18 @@ class TestDeviceLoad(common.TrezorTest):
         passphrase_protection = self.client.debug.read_passphrase_protection()
         self.assertEqual(passphrase_protection, True)
 
+    def test_load_device_3(self):
+        self.client.wipe_device()
+        self.client.load_device_by_xprv(xprv='xprv9s21ZrQH143K2JF8RafpqtKiTbsbaxEeUaMnNHsm5o6wCW3z8ySyH4UxFVSfZ8n7ESu7fgir8imbZKLYVBxFPND1pniTZ81vKfd45EHKX73', pin='', passphrase_protection=False, label='test', language='english')
+        address = self.client.get_address('Bitcoin', [])
+        self.assertEqual(address, '128RdrAkJDmqasgvfRf6MC5VcX4HKqH4mR')
+
+        self.client.wipe_device()
+        self.client.load_device_by_xprv(xprv='xprv9s21ZrQH143K2JF8RafpqtKiTbsbaxEeUaMnNHsm5o6wCW3z8ySyH4UxFVSfZ8n7ESu7fgir8imbZKLYVBxFPND1pniTZ81vKfd45EHKX73', pin='', passphrase_protection=True, label='test', language='english')
+        self.client.set_passphrase('passphrase')
+        address = self.client.get_address('Bitcoin', [])
+        self.assertEqual(address, '1CHUbFa4wTTPYgkYaw2LHSd5D4qJjMU8ri')
+
     def test_load_device_utf(self):
         words_nfkd = u'Pr\u030ci\u0301s\u030cerne\u030c z\u030clut\u030couc\u030cky\u0301 ku\u030an\u030c u\u0301pe\u030cl d\u030ca\u0301belske\u0301 o\u0301dy za\u0301ker\u030cny\u0301 uc\u030cen\u030c be\u030cz\u030ci\u0301 pode\u0301l zo\u0301ny u\u0301lu\u030a'
         words_nfc = u'P\u0159\xed\u0161ern\u011b \u017elu\u0165ou\u010dk\xfd k\u016f\u0148 \xfap\u011bl \u010f\xe1belsk\xe9 \xf3dy z\xe1ke\u0159n\xfd u\u010de\u0148 b\u011b\u017e\xed pod\xe9l z\xf3ny \xfal\u016f'