Test coverage: add test case to confirm that moduleType overrides are…

… applied for ts-node in loader mode

src/test/index.spec.ts

@@ -1888,5 +1888,12 @@ test.suite('ts-node', (test) => {
         expect(stdout).to.contain('CommonJS');
       });
     }
+
+    test('moduleTypes can override module type to CJS in an ESM loader project', async () => {
+      const { err, stderr, stdout } = await exec(
+        `${cmd} ./module-types/test.esm.js`
+      );
+      expect(err).to.equal(null);
+    });
   });
 });

tests/module-types/src/cjs-subdir/esm-exception/index.ts

@@ -0,0 +1,3 @@
+export const cjs: boolean = true;
+
+export const requireType = typeof require;

tests/module-types/src/cjs-subdir/index.ts

@@ -1 +1,3 @@
 export const cjs: boolean = true;
+
+export const requireType = typeof require;

tests/module-types/test.esm.js

@@ -0,0 +1,7 @@
+import assert from 'assert';
+
+import cjsSubdirCJS from './src/cjs-subdir';
+import cjsSubdirESM from './src/cjs-subdir/esm-exception';
+
+assert(cjsSubdirCJS.requireType === 'function');
+assert(cjsSubdirESM.requireType === 'undefined');