Address ts import error by changing test from .ts to .mjs

Author: eirikur-nc

package.json

@@ -43,7 +43,7 @@
     "test": "jest --no-watchman",
     "test-fed-compat": "ts-node --transpileOnly --compiler-options='{\"module\":\"commonjs\"}' scripts/fetch-federation-tests && yarn test federation-compat",
     "test:leaks": "cross-env \"LEAK_TEST=1\" jest --no-watchman --detectOpenHandles --detectLeaks --logHeapUsage",
-    "test:node": "node --experimental-strip-types --test **/tests/**/*.node.ts",
+    "test:node": "node --experimental-strip-types --test **/tests/**/*.node.*s",
     "ts:check": "tsc --noEmit"
   },
   "devDependencies": {

packages/load/tests/use-custom-loader.node.mjs

@@ -0,0 +1,23 @@
+import assert from 'node:assert';
+import { describe, it } from 'node:test';
+import { useCustomLoader, useCustomLoaderSync } from '../src/utils/custom-loader.ts';
+
+describe('useCustomLoader', () => {
+  it('can load a custom cjs loader from a file path', async () => {
+    const loader = await useCustomLoader(`./custom-loader.cjs`, import.meta.dirname);
+    const result = await loader('some-name', { customLoaderContext: {} });
+    assert.strictEqual(result, 'I like turtles');
+  });
+
+  it('can load a custom cjs loader synchronously', async () => {
+    const loader = useCustomLoaderSync(`./custom-loader.cjs`, import.meta.dirname);
+    const result = await loader('some-name', { customLoaderContext: {} });
+    assert.strictEqual(result, 'I like turtles');
+  });
+
+  it('can load a custom mjs loader from a file path', async () => {
+    const loader = await useCustomLoader(`./custom-loader.mjs`, import.meta.dirname);
+    const result = await loader('some-name', { customLoaderContext: {} });
+    assert.strictEqual(result, 'I like turtles');
+  });
+});