tests: adding unit tests

package.json

@@ -63,7 +63,7 @@
     "extension:package": "vsce package",
     "extension:publish": "vsce publish",
     "extension:publish-pre-release": "vsce publish --pre-release",
-    "test": "ts-mocha -p tsconfig.json tests/*test.ts --timeout 30s --diff false",
+    "test": "ts-mocha -p tsconfig.json 'tests/**/*test.ts' --timeout 30s --diff false",
     "test:coverage": "nyc npm run test"
   },
   "dependencies": {

src/common/utils.ts

@@ -121,7 +121,7 @@ export class ByteArrayMap<T> {
   }
 }
 
-function filePathRelativeTo(base: string, filePath: string): string {
+export function filePathRelativeTo(base: string, filePath: string): string {
   // Normalize the base path to convert any Windows backslashes to forward slashes
   // This is necessary because the URL object expects forward slashes
   const normalizedBase = base.replace(/\\/g, '/');

tests/common/utils.test.ts

@@ -0,0 +1,31 @@
+import * as assert from 'assert';
+import { filePathRelativeTo } from '../../src/common/utils';
+
+describe('Utils Tests', () => {
+  describe('filePathRelativeTo', () => {
+    // Given a valid base path and file path, it should return the correct relative file path.
+    it('should return the correct relative file path when arguments are unix like', () => {
+      const base = '/somelongpath/sources/sources.avm.json';
+      const filePath = 'slot-machine/slot-machine.teal.tok.map';
+
+      const result = filePathRelativeTo(base, filePath);
+
+      assert.strictEqual(
+        result,
+        '/somelongpath/sources/slot-machine/slot-machine.teal.tok.map',
+      );
+    });
+
+    it('should return the correct relative file path when arguments is windows like', () => {
+      const base = '\\somelongpath\\sources\\sources.avm.json';
+      const filePath = 'slot-machine/slot-machine.teal.tok.map';
+
+      const result = filePathRelativeTo(base, filePath);
+
+      assert.strictEqual(
+        result,
+        '/somelongpath/sources/slot-machine/slot-machine.teal.tok.map',
+      );
+    });
+  });
+});