fix: default export when importing in pure node ESM (#145)

* Fix default export when importing in pure node ESM

* preserve compatibility with code accessing the `default` field

* fix "default" type for cjs require

* add tests

jest.config.json

@@ -1,6 +1,6 @@
 {
   "preset": "ts-jest",
-  "testMatch": ["**/test/*test.ts"],
+  "testMatch": ["**/test/*test.(j|t)s"],
   "transform": {
     "<rootDir>/.+\\.ts?$": "ts-jest"
   },

src/index.ts

@@ -3,7 +3,7 @@ import { createLocalServerApi } from './localServerApi'
 import { createInitNetworkInterceptor } from './initNetworkInterceptor'
 import { createSentryTransport } from './sentryTransport'
 
-export default () => {
+function create() {
   const testkit = createTestkit()
   const sentryTransport = createSentryTransport(testkit)
   const initNetworkInterceptor = createInitNetworkInterceptor(testkit)
@@ -16,3 +16,6 @@ export default () => {
     localServer,
   }
 }
+
+create.default = create
+export = create

test/cjs-require.test.js

@@ -0,0 +1,8 @@
+const sentryTestkit = require('../dist/index')
+
+describe('commonjs require', () => {
+  it('should allow to require both default and non-default exports', () => {
+    expect(sentryTestkit()).toBeDefined()
+    expect(sentryTestkit.default()).toBeDefined()
+  })
+})

test/esm-require.test.ts

@@ -0,0 +1,10 @@
+import execa from 'execa'
+
+describe('es modules require', () => {
+  it('should allow to import as native esm', () => {
+    // test will fail if the command fails
+    execa.commandSync('node --experimental-vm-modules test/fixtures/esm.mjs', {
+      stdio: 'inherit',
+    })
+  })
+})

test/fixtures/esm.mjs

@@ -0,0 +1,3 @@
+import sentryTestkit from '../../dist/index.js'
+
+sentryTestkit()