Can you please add this to some contributor docs somewhere

Author: ReadyPlayerEmma

cline_docs/running_tests.md

@@ -0,0 +1,90 @@
+# Running Tests in Roo-Code
+
+This document explains how to run tests in the Roo-Code codebase.
+
+## Test Framework
+
+The project uses Jest for testing, with both extension (backend) and webview (frontend) tests. The test configuration is defined in `jest.config.js` at the root of the project.
+
+## Main Test Commands
+
+- **Run all tests**:
+
+    ```
+    npm test
+    ```
+
+    This runs both extension and webview tests in parallel.
+
+- **Run only extension tests**:
+
+    ```
+    npm run test:extension
+    ```
+
+- **Run only webview UI tests**:
+    ```
+    npm run test:webview
+    ```
+
+## Additional Options
+
+- **Run specific test file**:
+
+    ```
+    npm run test:extension -- src/path/to/file.test.ts
+    ```
+
+- **Run tests with verbose output**:
+
+    ```
+    npm run test:extension -- --verbose
+    ```
+
+- **Update snapshots** (useful when system prompt changes):
+    ```
+    npm run test:extension -- -u
+    ```
+- **List all test files**:
+
+    ```
+    npm run test:extension -- --listTests
+    ```
+
+- **Troubleshoot hanging tests**:
+    ```
+    npm run test:extension -- --detectOpenHandles
+    ```
+
+## Test Structure
+
+- Tests are located in `__tests__` directories throughout the codebase
+- Test files use the `.test.ts` naming convention
+- The project follows Jest conventions for test organization
+- Snapshot tests are used for testing prompts and other text-based outputs
+- Various mocks are implemented in `src/__mocks__/` directory
+
+## Common Test Failures
+
+### Snapshot Test Failures
+
+Snapshot tests may fail when changes are made to the system prompt or other text-based outputs. For example, adding a new tool to the system prompt will cause snapshot tests to fail until they are updated.
+
+To update snapshots:
+
+```
+npm run test:extension -- -u
+```
+
+Or update snapshots for a specific file:
+
+```
+npm run test:extension -- -u src/core/prompts/__tests__/system.test.ts
+```
+
+## Code Quality Rules
+
+According to the `.clinerules` file, test coverage is important in this project:
+
+1. Before attempting completion, always make sure that any code changes have test coverage
+2. Ensure all tests pass before submitting changes