change repl virtual filename to .cts extension so it compiles as cjs …

…even in ESM packages with module:nodenext

src/repl.ts

@@ -43,7 +43,7 @@ export const STDIN_FILENAME = `[stdin].ts`;
 /** @internal */
 export const STDIN_NAME = `[stdin]`;
 /** @internal */
-export const REPL_FILENAME = '<repl>.ts';
+export const REPL_FILENAME = '<repl>.cts';
 /** @internal */
 export const REPL_NAME = '<repl>';
 

src/test/repl/repl-environment.spec.ts

@@ -197,7 +197,7 @@ test.suite(
           exportsTest: true,
           // Note: vanilla node uses different name. See #1360
           stackTest: expect.stringContaining(
-            `    at ${join(TEST_DIR, '<repl>.ts')}:4:`
+            `    at ${join(TEST_DIR, '<repl>.cts')}:4:`
           ),
           moduleAccessorsTest: true,
           argv: [tsNodeExe],
@@ -350,7 +350,7 @@ test.suite(
           exportsTest: true,
           // Note: vanilla node uses different name. See #1360
           stackTest: expect.stringContaining(
-            `    at ${join(TEST_DIR, '<repl>.ts')}:4:`
+            `    at ${join(TEST_DIR, '<repl>.cts')}:4:`
           ),
           moduleAccessorsTest: true,
           argv: [tsNodeExe],
@@ -428,7 +428,7 @@ test.suite(
 
             // Note: vanilla node uses different name. See #1360
             stackTest: expect.stringContaining(
-              `    at ${join(TEST_DIR, '<repl>.ts')}:1:`
+              `    at ${join(TEST_DIR, '<repl>.cts')}:1:`
             ),
           },
         });
@@ -459,7 +459,7 @@ test.suite(
             exportsTest: true,
             // Note: vanilla node uses different name. See #1360
             stackTest: expect.stringContaining(
-              `    at ${join(TEST_DIR, '<repl>.ts')}:1:`
+              `    at ${join(TEST_DIR, '<repl>.cts')}:1:`
             ),
             moduleAccessorsTest: true,
           },

src/test/repl/repl.spec.ts

@@ -1,5 +1,10 @@
 import { context, expect } from '../testlib';
-import { delay, resetNodeEnvironment, ts } from '../helpers';
+import {
+  CMD_TS_NODE_WITHOUT_PROJECT_FLAG,
+  delay,
+  resetNodeEnvironment,
+  ts,
+} from '../helpers';
 import semver = require('semver');
 import { CMD_TS_NODE_WITH_PROJECT_FLAG, ctxTsNode, TEST_DIR } from '../helpers';
 import { createExec, createExecTester } from '../exec-helpers';
@@ -10,6 +15,7 @@ import {
   macroReplStderrContains,
 } from './helpers';
 import { expectStream } from '@cspotcode/expect-stream';
+import { join } from 'path';
 
 const test = context(ctxTsNode).contextEach(ctxRepl);
 test.serial();
@@ -219,7 +225,7 @@ test.suite('top level await', ({ contextEach }) => {
 
       expect(r.stdout).toBe('> > ');
       expect(r.stderr.replace(/\r\n/g, '\n')).toBe(
-        '<repl>.ts(4,7): error TS2322: ' +
+        '<repl>.cts(4,7): error TS2322: ' +
           (semver.gte(ts.version, '4.0.0')
             ? `Type 'number' is not assignable to type 'string'.\n`
             : `Type '1' is not assignable to type 'string'.\n`) +
@@ -616,3 +622,17 @@ test.suite('REPL treats object literals and block scopes correctly', (test) => {
     );
   });
 });
+
+test('repl executes input as cjs even in esm projects', async (t) => {
+  // Must exec child process, because we need a different cwd.
+  const p = exec(`${CMD_TS_NODE_WITHOUT_PROJECT_FLAG} -i`, {
+    cwd: join(TEST_DIR, 'repl-in-esm-package'),
+  });
+  p.child.stdin!.write(
+    'import fs2 from "fs"; fs2.existsSync("does not exist")'
+  );
+  p.child.stdin!.end();
+  const r = await p;
+  expect(r.stdout).toBe('> false\n> ');
+  expect(r.stderr).toBe('');
+});

tests/repl-in-esm-package/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

tests/repl-in-esm-package/tsconfig.json

@@ -0,0 +1,5 @@
+{
+  "compilerOptions": {
+    "module": "nodenext"
+  }
+}