Add a test for verifying sync log level changes (#3389)

Tests/Realm.Tests/Sync/SynchronizedInstanceTests.cs

@@ -17,8 +17,10 @@
 ////////////////////////////////////////////////////////////////////////////
 
 using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
 using NUnit.Framework;
@@ -28,7 +30,6 @@
 using Realms.Sync;
 using Realms.Sync.ErrorHandling;
 using Realms.Sync.Exceptions;
-
 using NUnitExplicit = NUnit.Framework.ExplicitAttribute;
 
 namespace Realms.Tests.Sync
@@ -728,6 +729,54 @@ public void CancelAsyncOperationsOnNonFatalErrors_WhenFalse_ShouldNotCancelAsync
  });
  }
 
+ [Test]
+ public void SyncLogger_WhenLevelChanges_LogsAtNewLevel()
+ {
+ var logs = new Dictionary<LogLevel, List<string>>();
+ foreach (LogLevel level in Enum.GetValues(typeof(LogLevel)))
+ {
+ logs[level] = new();
+ }
+
+ var regex = new Regex("Connection\\[\\d+]: Session\\[\\d+]");
+ var logger = Logger.Function((level, msg) =>
+ {
+ if (regex.IsMatch(msg))
+ {
+ logs[level].Add(msg);
+ }
+ });
+
+ Logger.LogLevel = LogLevel.Info;
+ Logger.Default = logger;
+
+ SyncTestHelpers.RunBaasTestAsync(async () =>
+ {
+ var config = await GetIntegrationConfigAsync();
+
+ using var realm = await GetRealmAsync(config);
+
+ var initialInfoLogs = logs[LogLevel.Info].Count;
+ Assert.That(initialInfoLogs, Is.GreaterThan(0));
+ Assert.That(logs[LogLevel.Debug].Count, Is.EqualTo(0));
+
+ Logger.LogLevel = LogLevel.Debug;
+
+ realm.Write(() =>
+ {
+ realm.Add(new PrimaryKeyStringObject
+ {
+ Id = Guid.NewGuid().ToString(),
+ });
+ });
+
+ await WaitForUploadAsync(realm);
+
+ Assert.That(logs[LogLevel.Info].Count, Is.GreaterThan(0));
+ Assert.That(logs[LogLevel.Debug].Count, Is.GreaterThan(0));
+ });
+ }
+
  private const int DummyDataSize = 100;
 
  private static void AddDummyData(Realm realm, bool singleTransaction)