Add test to highlight the issue with captured log level by logger

Author: nvborisenko

dotnet/test/common/Internal/Logging/LogTest.cs

@@ -9,13 +9,27 @@ public class LogTest
         private TestLogHandler testLogHandler;
         private ILogger logger;
 
+        private void ResetGlobalLog()
+        {
+            Log.SetLevel(LogEventLevel.Info);
+            Log.Handlers.Clear().Handlers.Add(new ConsoleLogHandler());
+        }
+
         [SetUp]
         public void SetUp()
         {
+            ResetGlobalLog();
+
             testLogHandler = new TestLogHandler();
             logger = Log.GetLogger<LogTest>();
         }
 
+        [TearDown]
+        public void TearDown()
+        {
+            ResetGlobalLog();
+        }
+
         [Test]
         public void LoggerShouldEmitEvent()
         {
@@ -141,6 +155,16 @@ public void ContextShouldChangeLevel()
             Assert.That(logger.Level, Is.EqualTo(LogEventLevel.Warn));
         }
 
+        [Test]
+        public void ContextShouldEmitMessages()
+        {
+            using var context = Log.CreateContext(LogEventLevel.Trace).Handlers.Add(testLogHandler);
+
+            logger.Trace("test message");
+
+            Assert.That(testLogHandler.Events.Count, Is.EqualTo(1));
+        }
+
         [Test]
         public void ShouldCreateContextWithCustomHandler()
         {