From c9c443c57a6c636d9400ba5983b2f14a347a169c Mon Sep 17 00:00:00 2001
From: James Addison <jay@jp-hosting.net>
Date: Sun, 20 Jun 2021 18:17:08 +0100
Subject: [PATCH] Test coverage: add test case to confirm that moduleType
 overrides are applied for ts-node in loader mode

---
 src/test/index.spec.ts                                   | 7 +++++++
 tests/module-types/src/cjs-subdir/esm-exception/index.ts | 3 +++
 tests/module-types/src/cjs-subdir/index.ts               | 2 ++
 tests/module-types/test.esm.js                           | 7 +++++++
 4 files changed, 19 insertions(+)
 create mode 100644 tests/module-types/src/cjs-subdir/esm-exception/index.ts
 create mode 100644 tests/module-types/test.esm.js

diff --git a/src/test/index.spec.ts b/src/test/index.spec.ts
index 5fda4567e..6445e8d90 100644
--- a/src/test/index.spec.ts
+++ b/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);
+    });
   });
 });
diff --git a/tests/module-types/src/cjs-subdir/esm-exception/index.ts b/tests/module-types/src/cjs-subdir/esm-exception/index.ts
new file mode 100644
index 000000000..62b62d0aa
--- /dev/null
+++ b/tests/module-types/src/cjs-subdir/esm-exception/index.ts
@@ -0,0 +1,3 @@
+export const cjs: boolean = true;
+
+export const requireType = typeof require;
diff --git a/tests/module-types/src/cjs-subdir/index.ts b/tests/module-types/src/cjs-subdir/index.ts
index a9a1650ec..62b62d0aa 100644
--- a/tests/module-types/src/cjs-subdir/index.ts
+++ b/tests/module-types/src/cjs-subdir/index.ts
@@ -1 +1,3 @@
 export const cjs: boolean = true;
+
+export const requireType = typeof require;
diff --git a/tests/module-types/test.esm.js b/tests/module-types/test.esm.js
new file mode 100644
index 000000000..ee7463cce
--- /dev/null
+++ b/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');