Adds log tag to each log file.

Logging/BaseLog.cs

@@ -21,7 +21,11 @@ namespace Logging
         {
             get
             {
-                if (logFile == null) logFile = new LogFile(GetFullName(), "log");
+                if (logFile == null)
+                {
+                    logFile = new LogFile(GetFullName(), "log");
+                    WriteLogTag();
+                }
                 return logFile;
             }
         }
@@ -73,6 +77,14 @@ namespace Logging
             return new LogFile($"{GetFullName()}_{GetSubfileNumber()}", ext);
         }
 
+        private void WriteLogTag()
+        {
+            var runId = NameUtils.GetRunId();
+            var category = NameUtils.GetCategoryName();
+            var name = NameUtils.GetTestMethodName();
+            LogFile.WriteRaw($"{runId} {category} {name}");
+        }
+
         private string ApplyReplacements(string str)
         {
             foreach (var replacement in replacements)

Logging/NameUtils.cs

@@ -26,6 +26,29 @@ namespace Logging
             return className.Replace('.', '-');
         }
 
+        public static string GetCategoryName()
+        {
+            var test = TestContext.CurrentContext.Test;
+            return test.ClassName!.Substring(0, test.ClassName.LastIndexOf('.'));
+        }
+
+        public static string GetTestId()
+        {
+            return GetEnvVar("TESTID");
+        }
+
+        public static string GetRunId()
+        {
+            return GetEnvVar("RUNID");
+        }
+
+        private static string GetEnvVar(string name)
+        {
+            var v = Environment.GetEnvironmentVariable(name);
+            if (string.IsNullOrEmpty(v)) return $"EnvVar'{name}'NotSet";
+            return v;
+        }
+
         private static string FormatArguments(TestContext.TestAdapter test)
         {
             if (test.Arguments == null || !test.Arguments.Any()) return "";

Logging/StatusLog.cs

@@ -21,37 +21,15 @@ namespace Logging
             Write(new StatusLogJson
             {
                 time = DateTime.UtcNow.ToString("u"),
-                runid = GetRunId(),
+                runid = NameUtils.GetRunId(),
                 status = resultStatus,
-                testid = GetTestId(),
+                testid = NameUtils.GetTestId(),
                 codexid = codexId,
                 fixturename = fixtureName,
-                testname = GetTestName()
+                testname = NameUtils.GetTestMethodName()
             });
         }
 
-        private string GetTestName()
-        {
-            return NameUtils.GetTestMethodName();
-        }
-
-        private string GetTestId()
-        {
-            return GetEnvVar("TESTID");
-        }
-
-        private string GetRunId()
-        {
-            return GetEnvVar("RUNID");
-        }
-
-        private string GetEnvVar(string name)
-        {
-            var v = Environment.GetEnvironmentVariable(name);
-            if (string.IsNullOrEmpty(v)) return $"'{name}' not set!";
-            return v;
-        }
-
         private void Write(StatusLogJson json)
         {
             try