test(e2e): add mts e2e test (#3753)

e2e/__tests__/native-esm-ts.test.ts

@@ -8,7 +8,7 @@ onNodeVersions('>=12.16.0', () => {
     })
 
     expect(exitCode).toBe(0)
-    expect(json.numTotalTests).toBe(2)
-    expect(json.numPassedTests).toBe(2)
+    expect(json.numTotalTests).toBe(3)
+    expect(json.numPassedTests).toBe(3)
   })
 })

e2e/native-esm-ts/__tests__/native-esm-ts.spec.ts

@@ -1,9 +1,16 @@
+import { test, expect } from '@jest/globals'
+
 import { double } from '../double'
+import { triple } from '../triple.mjs'
 
 test('double', () => {
   expect(double(2)).toBe(4)
 })
 
+test('triple', () => {
+  expect(triple(2)).toBe(6)
+})
+
 test('import.meta', () => {
   expect(typeof import.meta.url).toBe('string')
 })

e2e/native-esm-ts/jest-isolated.config.js

@@ -7,7 +7,8 @@ module.exports = {
       useESM: true,
     },
   },
+  resolver: '<rootDir>/mjs-resolver.ts',
   transform: {
-    '^.+.tsx?$': '<rootDir>/../../legacy.js',
+    '^.+\\.m?tsx?$': '<rootDir>/../../legacy.js',
   },
 }

e2e/native-esm-ts/mjs-resolver.ts

@@ -0,0 +1,15 @@
+const mjsResolver = (path, options) => {
+  const mjsExtRegex = /\.mjs$/i
+  const resolver = options.defaultResolver
+  if (mjsExtRegex.test(path)) {
+    try {
+      return resolver(path.replace(mjsExtRegex, '.mts'), options)
+    } catch {
+      // use default resolver
+    }
+  }
+
+  return resolver(path, options)
+}
+
+module.exports = mjsResolver