test: check typescript loader

marco-ippolito · aduh95 · commit 936994274510 · 2025-01-02T15:28:12.000+01:00
PR-URL: #54657 Refs: #54645 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Zeyu "Alex" Yang <himself65@outlook.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
diff --git a/test/es-module/test-typescript.mjs b/test/es-module/test-typescript.mjs
@@ -323,3 +323,29 @@ test('expect error when executing a TypeScript file with generics', async () =>
   strictEqual(result.stdout, '');
   strictEqual(result.code, 1);
 });
+
+test('execute a TypeScript loader and a .ts file', async () => {
+  const result = await spawnPromisified(process.execPath, [
+    '--experimental-strip-types',
+    '--no-warnings',
+    '--import',
+    fixtures.fileURL('typescript/ts/test-loader.ts'),
+    fixtures.path('typescript/ts/test-typescript.ts'),
+  ]);
+  strictEqual(result.stderr, '');
+  match(result.stdout, /Hello, TypeScript!/);
+  strictEqual(result.code, 0);
+});
+
+test('execute a TypeScript loader and a .js file', async () => {
+  const result = await spawnPromisified(process.execPath, [
+    '--experimental-strip-types',
+    '--no-warnings',
+    '--import',
+    fixtures.fileURL('typescript/ts/test-loader.ts'),
+    fixtures.path('typescript/ts/test-simple.js'),
+  ]);
+  strictEqual(result.stderr, '');
+  match(result.stdout, /Hello, TypeScript!/);
+  strictEqual(result.code, 0);
+});
diff --git a/test/fixtures/typescript/ts/hook.ts b/test/fixtures/typescript/ts/hook.ts
@@ -0,0 +1,11 @@
+import type { ResolveHook } from 'node:module';
+
+// Pass through
+export const resolve: ResolveHook = async function resolve(specifier, context, nextResolve) {
+    if(false){
+        // https://github.com/nodejs/node/issues/54645
+        // A bug in the typescript parsers swc causes
+        // the next line to not be parsed correctly
+    }
+    return nextResolve(specifier, context);
+};
diff --git a/test/fixtures/typescript/ts/test-loader.ts b/test/fixtures/typescript/ts/test-loader.ts
@@ -0,0 +1,4 @@
+import { register } from 'node:module';
+import * as fixtures from '../../../common/fixtures.mjs';
+
+register(fixtures.fileURL('typescript/ts/hook.ts'));
diff --git a/test/fixtures/typescript/ts/test-simple.js b/test/fixtures/typescript/ts/test-simple.js
@@ -0,0 +1,2 @@
+const str = "Hello, TypeScript!";
+console.log(str);

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+const str = "Hello, TypeScript!";`
	`2`	`+console.log(str);`