SLVS-1473 Refactor AliveConnectionTracker (#5717)

Author: gabriela-trutan-sonarsource

src/ConnectedMode.UnitTests/Persistence/ServerConnectionsRepositoryTests.cs

@@ -18,6 +18,7 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 
+using System.ComponentModel;
 using System.IO;
 using System.IO.Abstractions;
 using SonarLint.VisualStudio.ConnectedMode.Binding;
@@ -338,6 +339,32 @@ public void TryAdd_WritingThrowsException_DoesNotUpdateConnectionAndWritesLog()
         logger.Received(1).WriteLine($"Failed updating the {ServerConnectionsRepository.ConnectionsFileName}: {exceptionMsg}");
     }
 
+    [TestMethod]
+    public void TryAdd_DoesNotAddConnection_DoesNotInvokeConnectionChangedEvent()
+    {
+        MockReadingFile(new ServerConnectionsListJsonModel());
+        jsonFileHandler.TryWriteToFile(Arg.Any<string>(), Arg.Any<ServerConnectionsListJsonModel>()).Returns(false);
+        var eventHandler = Substitute.For<EventHandler>();
+        testSubject.ConnectionChanged += eventHandler;
+
+        testSubject.TryAdd(sonarCloudServerConnection);
+
+        eventHandler.DidNotReceive().Invoke(testSubject, Arg.Any<EventArgs>());
+    }
+
+    [TestMethod]
+    public void TryAdd_AddsConnection_InvokesConnectionChangedEvent()
+    {
+        MockReadingFile(new ServerConnectionsListJsonModel());
+        jsonFileHandler.TryWriteToFile(Arg.Any<string>(), Arg.Any<ServerConnectionsListJsonModel>()).Returns(true);
+        var eventHandler = Substitute.For<EventHandler>();
+        testSubject.ConnectionChanged += eventHandler;
+
+        testSubject.TryAdd(sonarCloudServerConnection);
+
+        eventHandler.Received().Invoke(testSubject, Arg.Any<EventArgs>());
+    }
+
     [TestMethod]
     public void TryDelete_FileCouldNotBeRead_ReturnsFalse()
     {
@@ -439,6 +466,32 @@ public void TryDelete_WritingThrowsException_DoesNotUpdateConnectionAndWritesLog
         logger.Received(1).WriteLine($"Failed updating the {ServerConnectionsRepository.ConnectionsFileName}: {exceptionMsg}");
     }
 
+    [TestMethod]
+    public void TryDelete_DoesNotDeleteConnection_DoesNotInvokeConnectionChangedEvent()
+    {
+        var sonarQube = MockFileWithOneSonarQubeConnection();
+        jsonFileHandler.TryWriteToFile(Arg.Any<string>(), Arg.Any<ServerConnectionsListJsonModel>()).Returns(false);
+        var eventHandler = Substitute.For<EventHandler>();
+        testSubject.ConnectionChanged += eventHandler;
+
+        testSubject.TryDelete(sonarQube.Id);
+
+        eventHandler.DidNotReceive().Invoke(testSubject, Arg.Any<EventArgs>());
+    }
+
+    [TestMethod]
+    public void TryDelete_DeletesConnection_InvokesConnectionChangedEvent()
+    {
+        var sonarQube = MockFileWithOneSonarQubeConnection();
+        jsonFileHandler.TryWriteToFile(Arg.Any<string>(), Arg.Any<ServerConnectionsListJsonModel>()).Returns(true);
+        var eventHandler = Substitute.For<EventHandler>();
+        testSubject.ConnectionChanged += eventHandler;
+
+        testSubject.TryDelete(sonarQube.Id);
+
+        eventHandler.Received(1).Invoke(testSubject, Arg.Any<EventArgs>());
+    }
+
     [TestMethod]
     public void TryUpdateSettingsById_FileCouldNotBeRead_ReturnsFalse()
     {
@@ -505,6 +558,32 @@ public void TryUpdateSettingsById_WritingThrowsException_DoesNotUpdateConnection
         logger.Received(1).WriteLine($"Failed updating the {ServerConnectionsRepository.ConnectionsFileName}: {exceptionMsg}");
     }
 
+    [TestMethod]
+    public void TryUpdateSettingsById_DoesNotUpdateConnection_DoesNotInvokeConnectionChangedEvent()
+    {
+        var sonarQube = MockFileWithOneSonarQubeConnection();
+        jsonFileHandler.TryWriteToFile(Arg.Any<string>(), Arg.Any<ServerConnectionsListJsonModel>()).Returns(false);
+        var eventHandler = Substitute.For<EventHandler>();
+        testSubject.ConnectionChanged += eventHandler;
+
+        testSubject.TryDelete(sonarQube.Id);
+
+        eventHandler.DidNotReceive().Invoke(testSubject, Arg.Any<EventArgs>());
+    }
+
+    [TestMethod]
+    public void TryUpdateSettingsById_UpdatesConnection_InvokesConnectionChangedEvent()
+    {
+        var sonarQube = MockFileWithOneSonarQubeConnection();
+        jsonFileHandler.TryWriteToFile(Arg.Any<string>(), Arg.Any<ServerConnectionsListJsonModel>()).Returns(true);
+        var eventHandler = Substitute.For<EventHandler>();
+        testSubject.ConnectionChanged += eventHandler;
+
+        testSubject.TryUpdateSettingsById(sonarQube.Id, new ServerConnectionSettings(true));
+
+        eventHandler.Received(1).Invoke(testSubject, Arg.Any<EventArgs>());
+    }
+
     [TestMethod]
     public void TryUpdateCredentialsById_ConnectionDoesNotExist_DoesNotUpdateCredentials()
     {
@@ -540,6 +619,30 @@ public void TryUpdateCredentialsById_SonarQubeConnectionExists_UpdatesCredential
         credentialsLoader.Received(1).Save(newCredentials, sonarQube.ServerUri);
     }
 
+    [TestMethod]
+    public void TryUpdateCredentialsById_DoesNotUpdateCredentials_DoesNotInvokeConnectionChangedEvent()
+    {
+        MockReadingFile(new ServerConnectionsListJsonModel());
+        var eventHandler = Substitute.For<EventHandler<ServerConnectionUpdatedEventArgs>>();
+        testSubject.CredentialsChanged += eventHandler;
+
+        testSubject.TryUpdateCredentialsById("non-existingConn", Substitute.For<ICredentials>());
+
+        eventHandler.DidNotReceive().Invoke(testSubject, Arg.Any<ServerConnectionUpdatedEventArgs>());
+    }
+
+    [TestMethod]
+    public void TryUpdateCredentialsById_UpdatesCredentials_InvokesConnectionChangedEvent()
+    {
+        var sonarQube = MockFileWithOneSonarQubeConnection();
+        var eventHandler = Substitute.For<EventHandler<ServerConnectionUpdatedEventArgs>>();
+        testSubject.CredentialsChanged += eventHandler;
+
+        testSubject.TryUpdateCredentialsById(sonarQube.Id, Substitute.For<ICredentials>());
+
+        eventHandler.Received(1).Invoke(testSubject, Arg.Is<ServerConnectionUpdatedEventArgs>(args => args.ServerConnection == sonarQube));
+    }
+
     [TestMethod]
     [DataRow(true)]
     [DataRow(false)]

src/ConnectedMode/Persistence/ServerConnectionsRepository.cs

@@ -43,6 +43,9 @@ internal class ServerConnectionsRepository : IServerConnectionsRepository
     private readonly string connectionsStorageFilePath;
     private static readonly object LockObject = new();
 
+    public event EventHandler ConnectionChanged;
+    public event EventHandler<ServerConnectionUpdatedEventArgs> CredentialsChanged;
+
     [ImportingConstructor]
     public ServerConnectionsRepository(
         IJsonFileHandler jsonFileHandle,
@@ -127,6 +130,7 @@ public bool TryUpdateCredentialsById(string connectionId, ICredentials credentia
             if (wasFound)
             {
                 credentialsLoader.Save(credentials, serverConnection.CredentialsUri);
+                OnCredentialsChanged(serverConnection);
                 return true;
             }
         }
@@ -229,7 +233,12 @@ private bool SafeUpdateConnectionsFile(Func<List<ServerConnection>, bool> tryUpd
                 if (tryUpdateConnectionModels(serverConnections))
                 {
                     var model = serverConnectionModelMapper.GetServerConnectionsListJsonModel(serverConnections);
-                    return jsonFileHandle.TryWriteToFile(connectionsStorageFilePath, model);
+                    var wasSaved = jsonFileHandle.TryWriteToFile(connectionsStorageFilePath, model);
+                    if (wasSaved)
+                    {
+                        OnConnectionChanged();
+                    }
+                    return wasSaved;
                 }
             }
             catch (Exception ex) when (!ErrorHandler.IsCriticalException(ex))
@@ -240,4 +249,7 @@ private bool SafeUpdateConnectionsFile(Func<List<ServerConnection>, bool> tryUpd
             return false;
         }
     }
+
+    private void OnConnectionChanged() => ConnectionChanged?.Invoke(this, EventArgs.Empty);
+    private void OnCredentialsChanged(ServerConnection serverConnection) => CredentialsChanged?.Invoke(this, new ServerConnectionUpdatedEventArgs(serverConnection));
 }

src/Core/Binding/IServerConnectionsRepository.cs

@@ -29,4 +29,17 @@ public interface IServerConnectionsRepository
     bool TryUpdateSettingsById(string connectionId, ServerConnectionSettings connectionSettings);
     bool TryUpdateCredentialsById(string connectionId, ICredentials credentials);
     bool ConnectionsFileExists();
+    event EventHandler ConnectionChanged;
+    event EventHandler<ServerConnectionUpdatedEventArgs> CredentialsChanged;
 }
+
+public class ServerConnectionUpdatedEventArgs : EventArgs
+{
+    public ServerConnectionUpdatedEventArgs(ServerConnection serverConnection)
+    {
+        ServerConnection = serverConnection;
+    }
+
+    public ServerConnection ServerConnection { get; }
+}
+