test: module syntax should throw

PR-URL: #57121
Reviewed-By: Pietro Marchini <[email protected]>

Author: marco-ippolito

test/es-module/test-typescript-eval.mjs

@@ -263,3 +263,25 @@ test('check syntax error is thrown when passing invalid syntax with --input-type
   match(result.stderr, /ERR_INVALID_TYPESCRIPT_SYNTAX/);
   strictEqual(result.code, 1);
 });
+
+test('should not allow module keyword', async () => {
+  const result = await spawnPromisified(process.execPath, [
+    '--experimental-strip-types',
+    '--input-type=module-typescript',
+    '--eval',
+    'module F { export type x = number }']);
+  strictEqual(result.stdout, '');
+  match(result.stderr, /ERR_UNSUPPORTED_TYPESCRIPT_SYNTAX/);
+  strictEqual(result.code, 1);
+});
+
+test('should not allow declare module keyword', async () => {
+  const result = await spawnPromisified(process.execPath, [
+    '--experimental-strip-types',
+    '--input-type=module-typescript',
+    '--eval',
+    'declare module F { export type x = number }']);
+  strictEqual(result.stdout, '');
+  match(result.stderr, /ERR_UNSUPPORTED_TYPESCRIPT_SYNTAX/);
+  strictEqual(result.code, 1);
+});

test/es-module/test-typescript-transform.mjs

@@ -85,9 +85,10 @@ test('execute a TypeScript file with legacy-module', async () => {
     fixtures.path('typescript/ts/transformation/test-legacy-module.ts'),
   ]);
 
-  strictEqual(result.stderr, '');
-  match(result.stdout, /Hello, TypeScript!/);
-  strictEqual(result.code, 0);
+  match(result.stderr, /ERR_UNSUPPORTED_TYPESCRIPT_SYNTAX/);
+  match(result.stderr, /`module` keyword is not supported\. Use `namespace` instead/);
+  strictEqual(result.stdout, '');
+  strictEqual(result.code, 1);
 });
 
 test('execute a TypeScript file with modern typescript syntax', async () => {