Enable TypeScript hint for *.js

Follow #17 and preparation for #20

test/suite/index.js

@@ -11,7 +11,7 @@ function run() {
 
   const testsRoot = path.resolve(__dirname, "..");
 
-  return new Promise((resolve, reject) => {
+  return /** @type {Promise<void>} */ (new Promise((resolve, reject) => {
     // add the test in this particular order.
     // this is so that first the workspace is opened,
     // and then the files without causing extra window reloads
@@ -30,7 +30,7 @@ function run() {
     } catch (err) {
       reject(err);
     }
-  });
+  }));
 }
 
 module.exports = {

test/suite/lib.js

@@ -19,7 +19,7 @@ const sleep = util.promisify(setTimeout);
  * @param {string} dirPath absolute path to test case directory
  */
 async function caseDirTest(dirPath) {
-  process.env.XDG_CONFIG_HOME = path.join(dirPath, "xdg-config-home");
+  process.env["XDG_CONFIG_HOME"] = path.join(dirPath, "xdg-config-home");
 
   const give = (await vscode.workspace.openTextDocument(vscode.Uri.file(path.join(dirPath, "input.yaml")))).getText();
   const want = (await vscode.workspace.openTextDocument(vscode.Uri.file(path.join(dirPath, "result.yaml")))).getText();

test/suite/workspace.test.js

@@ -20,6 +20,9 @@ suite("workspace", () => {
   for (const tc of testCases) {
     test(tc, async () => {
       const wsf = vscode.workspace.getWorkspaceFolder(vscode.Uri.file(path.join(casesDir, tc)));
+      if (!wsf) {
+        throw Error;
+      }
       await caseDirTest(wsf.uri.fsPath);
     });
   }

tsconfig.json

@@ -2,7 +2,8 @@
   "extends": ["@tsconfig/strictest/tsconfig", "@tsconfig/node20/tsconfig"],
   "compilerOptions": {
     "outDir": "out",
-    "noUnusedLocals": false
+    "noUnusedLocals": false,
+    "checkJs": true
   },
-  "include": ["**/*.ts"]
+  "include": ["**/*.ts", "**/*.js"]
 }