Add IMAP local calendar operation tests using in-memory DB (#807)

* Add IMAP local calendar operation handler tests

* Fix tests.

* Fix calendar item show as not updating.

* Create one default calendar for local calendar accounts.

Wino.Core.Tests/Synchronizers/ImapSynchronizerCalDavConfigurationTests.cs

@@ -119,7 +119,8 @@ public class ImapSynchronizerCalDavConfigurationTests
             unifiedSynchronizer,
             Mock.Of<IImapSynchronizerErrorHandlerFactory>(),
             Mock.Of<ICalDavClient>(),
-            autoDiscoveryService ?? Mock.Of<IAutoDiscoveryService>());
+            autoDiscoveryService ?? Mock.Of<IAutoDiscoveryService>(),
+            Mock.Of<ICalendarService>());
     }
 
     private static CustomServerInformation CreateServerInformation()

Wino.Core.Tests/Synchronizers/ImapSynchronizerIdleTests.cs

@@ -76,6 +76,7 @@ public class ImapSynchronizerIdleTests
             unifiedSynchronizer,
             Mock.Of<IImapSynchronizerErrorHandlerFactory>(),
             Mock.Of<ICalDavClient>(),
-            Mock.Of<IAutoDiscoveryService>());
+            Mock.Of<IAutoDiscoveryService>(),
+            Mock.Of<ICalendarService>());
     }
 }