Not new db for every test. Instead clear it.

Author: rohe

src/oidcendpoint/shelve_db.py

@@ -28,3 +28,9 @@ def delete(self, key):
 
     def keys(self):
         return self.db.keys()
+
+    def clear(self):
+        self.db.clear()
+
+    def close(self):
+        self.db.close()

tests/test_08_session.py

@@ -490,8 +490,9 @@ def test_sub_minting_class():
 class TestSessionShelveDB(object):
     @pytest.fixture(autouse=True)
     def create_sdb(self):
-        # Create fresh database each time
-        _db = ShelveDataBase(filename='shelf', flag='n', writeback=True)
+        # Create database once
+        _db = ShelveDataBase(filename='shelf', flag='c', writeback=True)
+        _db.clear()
         _sso_db = SSODb(_db)
         passwd = rndstr(24)
         _th_args = {