Update submodule content (#61)

Co-authored-by: mkorbel1 <[email protected]>

docs/_docs/A18-unit-testing.md

@@ -2,12 +2,22 @@
 title: "Unit Testing"
 permalink: /docs/unit-test/
 excerpt: "Unit Testing"
-last_modified_at: 2022-12-06
+last_modified_at: 2024-06-11
 toc: true
 ---
 
 Dart has a great unit testing package available on pub.dev: <https://pub.dev/packages/test>
 
-The ROHD package has a great set of examples of how to write unit tests for ROHD `Module`s in the test/ directory.
+The ROHD package has a great set of examples of how to write unit tests for ROHD `Module`s in the `test/` directory.
 
-Note that when unit testing with ROHD, it is important to reset the `Simulator` with `Simulator.reset()`.
+Note that when unit testing with ROHD, it is important to reset the `Simulator` with `Simulator.reset()` between tests.  For example, you could include something like the following so that the `Simulator` is always reset at the end of each of your tests:
+
+```dart
+void main() {
+  tearDown(() async {
+    await Simulator.reset();
+  });
+
+  test('my first test', () async {
+    ...
+```