Core (unit tests)

- Added a unit test for `RUSTACEAN_SIMPLE`

source/gogga/core.d

@@ -344,3 +344,24 @@ unittest
     // Make space between unit tests
 	writeln();
 }
+
+unittest
+{
+    GoggaLogger gLogger = new GoggaLogger();
+	gLogger.mode(GoggaMode.RUSTACEAN_SIMPLE);
+
+    // Test the normal modes
+    gLogger.info("This is an info message");
+    gLogger.warn("This is a warning message");
+    gLogger.error("This is an error message");
+
+	// We shouldn't see anything as debug is off
+	gLogger.dbg("This is a debug which is hidden", 1);
+
+	// Now enable debugging and you should see it
+	gLogger.enableDebug();
+	gLogger.dbg("This is a VISIBLE debug", true);
+
+    // Make space between unit tests
+	writeln();
+}