Chore: Add baseline unit tests (RooCodeInc#2417)

* Fix: Better Windows path support

* Move to 'chai' for test running

* Fix: Let's start with what we know

* Chore: Add 'root' level file path test, remove less useful tests

* Chore: Add 'root' level file path test, remove less useful tests

---------

Co-authored-by: Dennis Bartlett <[email protected]>

Author: mdp

.changeset/mean-dragons-hug.md

@@ -0,0 +1,6 @@
+---
+"claude-dev": patch
+---
+
+Chore: Add tests to context-mentions, run tests with mocha and ts-node - `npm run test:unit`
+

.github/workflows/test.yml

@@ -73,6 +73,9 @@ jobs:
             - name: Build Extension
               run: npm run compile
 
+            - name: Unit Tests
+              run: npm run test:unit
+
             # Run extension tests with coverage
             - name: Extension Tests with Coverage
               id: extension_coverage

.mocharc.json

@@ -0,0 +1,6 @@
+{
+	"extension": ["ts"],
+	"spec": "src/**/__tests__/*.ts",
+	"require": ["ts-node/register", "source-map-support/register"],
+	"recursive": true
+}

package-lock.json

@@ -303,6 +303,7 @@
 		"format:fix": "prettier . --write",
 		"test": "vscode-test",
 		"test:ci": "node scripts/test-ci.js",
+		"test:unit": "TS_NODE_PROJECT='./tsconfig.unit-test.json' mocha",
 		"test:coverage": "vscode-test --coverage",
 		"install:all": "npm install && cd webview-ui && npm install",
 		"dev:webview": "cd webview-ui && npm run dev",
@@ -339,6 +340,7 @@
 		"prettier": "^3.3.3",
 		"should": "^13.2.3",
 		"sinon": "^19.0.2",
+		"ts-node": "^10.9.2",
 		"typescript": "^5.4.5"
 	},
 	"dependencies": {