core/tests: add storage.cache tests

core/tests/test_storage.cache.py

@@ -0,0 +1,99 @@
+from common import *
+from mock import patch
+from mock_storage import mock_storage
+
+import storage
+from storage import cache
+from trezor.messages.Initialize import Initialize
+from trezor.messages.ClearSession import ClearSession
+from trezor.wire import DUMMY_CONTEXT
+
+from apps.homescreen import handle_Initialize, handle_ClearSession
+
+KEY = 99
+
+
+class TestStorageCache(unittest.TestCase):
+    def test_session_id(self):
+        session_id_a = cache.get_session_id()
+        self.assertIsNotNone(session_id_a)
+        session_id_b = cache.get_session_id()
+        self.assertEqual(session_id_a, session_id_b)
+
+        cache.clear()
+        session_id_c = cache.get_session_id()
+        self.assertIsNotNone(session_id_c)
+        self.assertNotEqual(session_id_a, session_id_c)
+
+    def test_get_set(self):
+        value = cache.get(KEY)
+        self.assertIsNone(value)
+
+        cache.set(KEY, "hello")
+        value = cache.get(KEY)
+        self.assertEqual(value, "hello")
+
+        cache.clear()
+        value = cache.get(KEY)
+        self.assertIsNone(value)
+
+    @mock_storage
+    def test_Initialize(self):
+        def call_Initialize(**kwargs):
+            msg = Initialize(**kwargs)
+            return await_result(handle_Initialize(DUMMY_CONTEXT, msg))
+
+        # calling Initialize without an ID allocates a new one
+        session_id = cache.get_session_id()
+        features = call_Initialize()
+        new_session_id = cache.get_session_id()
+        self.assertNotEqual(session_id, new_session_id)
+        self.assertEqual(new_session_id, features.session_id)
+
+        # calling Initialize with the current ID does not allocate a new one
+        features = call_Initialize(session_id=new_session_id)
+        same_session_id = cache.get_session_id()
+        self.assertEqual(new_session_id, same_session_id)
+        self.assertEqual(same_session_id, features.session_id)
+
+        call_Initialize()
+        # calling Initialize with a non-current ID returns a different one
+        features = call_Initialize(session_id=new_session_id)
+        self.assertNotEqual(new_session_id, features.session_id)
+
+        # allocating a new session ID clears the cache
+        cache.set(KEY, "hello")
+        features = call_Initialize()
+        self.assertIsNone(cache.get(KEY))
+
+        # resuming a session does not clear the cache
+        cache.set(KEY, "hello")
+        call_Initialize(session_id=features.session_id)
+        self.assertEqual(cache.get(KEY), "hello")
+
+        # supplying a different session ID clears the cache
+        self.assertNotEqual(new_session_id, features.session_id)
+        call_Initialize(session_id=new_session_id)
+        self.assertIsNone(cache.get(KEY))
+
+    @mock_storage
+    def test_ClearSession(self):
+        def call_Initialize(**kwargs):
+            msg = Initialize(**kwargs)
+            return await_result(handle_Initialize(DUMMY_CONTEXT, msg))
+
+        def call_ClearSession():
+            return await_result(handle_ClearSession(DUMMY_CONTEXT, ClearSession()))
+
+        session_id = call_Initialize().session_id
+        cache.set(KEY, "hello")
+        self.assertEqual(cache.get(KEY), "hello")
+
+        call_ClearSession()
+        self.assertIsNone(cache.get(KEY))
+        new_session_id = cache.get_session_id()
+        self.assertNotEqual(session_id, new_session_id)
+
+
+if __name__ == "__main__":
+    unittest.main()