add test for GetAddress with show flag on

tests/test_msg_getaddress_show.py

@@ -0,0 +1,14 @@
+import unittest
+import common
+import trezorlib.ckd_public as bip32
+
+class TestMsgGetaddress(common.TrezorTest):
+
+    def test_show(self):
+        self.setup_mnemonic_nopin_nopassphrase()
+        self.assertEqual(self.client.get_address('Bitcoin', [1], show_display=True), '1CK7SJdcb8z9HuvVft3D91HLpLC6KSsGb')
+        self.assertEqual(self.client.get_address('Bitcoin', [2], show_display=True), '15AeAhtNJNKyowK8qPHwgpXkhsokzLtUpG')
+        self.assertEqual(self.client.get_address('Bitcoin', [3], show_display=True), '1CmzyJp9w3NafXMSEFH4SLYUPAVCSUrrJ5')
+
+if __name__ == '__main__':
+    unittest.main()