chore!: Build as ECMAScript module

Jest's support for ESM is lacking, so for simplicity this also changes
the test suite to use Node's built-in test runner and typescript
support, and jest's `expect` package.

This change is breaking because any non-ESM consuming packages must now
have minumum Node version of 20.19.0.

Author: nicknovitski

.env

@@ -0,0 +1 @@
+NODE_OPTIONS=--test-coverage-branches=100 --test-coverage-functions=100 --test-coverage-lines=100 --test-reporter=spec --test-reporter-destination=stdout --test-reporter=lcov --test-reporter-destination=./lcov.info

.gitignore

@@ -5,7 +5,7 @@
 node_modules/
 
 # Tests
-/coverage/
+lcov.info
 
 # Yarn
 /yarn-error.log

mise.toml

@@ -21,7 +21,7 @@ run = "yarn npm publish --dry-run"
 
 [tasks."checks:test"]
 depends = ["yarn"]
-run = "node --run test"
+run = "node --run test -- --experimental-test-coverage"
 
 [tasks."checks:lint"]
 depends = ["yarn"]

package.json

@@ -2,8 +2,10 @@
   "name": "expo-server-sdk",
   "version": "5.0.0",
   "description": "Server-side library for working with Expo using Node.js",
-  "main": "build/ExpoClient.js",
-  "types": "build/ExpoClient.d.ts",
+  "type": "module",
+  "main": "./build/ExpoClient.js",
+  "exports": "./build/ExpoClient.js",
+  "types": "./build/ExpoClient.d.ts",
   "files": [
     "build"
   ],
@@ -14,22 +16,9 @@
     "build": "yarn prepack",
     "lint": "eslint",
     "prepack": "tsc --project tsconfig.build.json",
-    "test": "jest --coverage",
-    "tsc": "tsc"
-  },
-  "jest": {
-    "coverageDirectory": "<rootDir>/../coverage",
-    "coverageThreshold": {
-      "global": {
-        "branches": 100,
-        "functions": 100,
-        "lines": 100,
-        "statements": 0
-      }
-    },
-    "preset": "ts-jest",
-    "rootDir": "src",
-    "testEnvironment": "node"
+    "test": "node --test --env-file .env",
+    "tsc": "tsc",
+    "watch": "tsc --watch"
   },
   "repository": {
     "type": "git",
@@ -56,10 +45,9 @@
     "@types/promise-retry": "1.1.6",
     "eslint": "9.39.2",
     "eslint-config-universe": "15.0.3",
-    "jest": "29.7.0",
+    "expect": "30.2.0",
     "jiti": "2.6.1",
     "prettier": "3.7.4",
-    "ts-jest": "29.4.6",
     "typescript": "5.9.3"
   },
   "packageManager": "yarn@4.12.0"

src/ExpoClient.ts

@@ -6,6 +6,7 @@
  * https://expo.dev
  */
 import assert from 'node:assert';
+import { createRequire } from 'node:module';
 import { gzipSync } from 'node:zlib';
 import promiseLimit from 'promise-limit';
 import promiseRetry from 'promise-retry';
@@ -19,7 +20,9 @@ import {
   pushNotificationReceiptChunkLimit,
   requestRetryMinTimeout,
   sendApiUrl,
-} from './ExpoClientValues';
+} from './ExpoClientValues.ts';
+
+const require = createRequire(import.meta.url);
 
 export class Expo {
   static pushNotificationChunkSizeLimit = pushNotificationChunkLimit;
@@ -199,6 +202,9 @@ export class Expo {
     const json = JSON.stringify(options.body);
     assert(json != null, `JSON request body must not be null`);
 
+    // NOTE: This can be replaced with an import with the `{ type: "json" }`
+    // attribute when we drop support for node versions below v20.10.0, when
+    // import attributes were stabilized
     const sdkVersion = require('../package.json').version;
     const requestHeaders = new Headers({
       Accept: 'application/json',

src/__tests__/ExpoClient-test.ts

@@ -1,11 +1,12 @@
-import { afterEach, beforeEach, describe, expect, test } from '@jest/globals';
+import { expect } from 'expect';
 import assert from 'node:assert';
 import { randomUUID } from 'node:crypto';
+import { afterEach, beforeEach, describe, test } from 'node:test';
 import { gunzipSync } from 'node:zlib';
 import { MockAgent, setGlobalDispatcher } from 'undici';
 
-import ExpoClient, { ExpoPushMessage } from '../ExpoClient';
-import { getReceiptsApiUrl, sendApiUrl } from '../ExpoClientValues';
+import ExpoClient, { type ExpoPushMessage } from '../ExpoClient.ts';
+import { getReceiptsApiUrl, sendApiUrl } from '../ExpoClientValues.ts';
 
 const apiBaseUrl = 'https://exp.host';
 const accessToken = 'foobar';

tsconfig.json

@@ -1,12 +1,12 @@
 {
   "extends": [
     "@tsconfig/bases/strictest",
-    "@tsconfig/bases/node20" // The minimum supported major node version
+    "@tsconfig/bases/node20", // The minimum supported major node version
+    "@tsconfig/bases/node-ts"
   ],
   "compilerOptions": {
     "declaration": true,
-    "noEmit": true,
-    "sourceMap": true
+    "noEmit": true
   },
   "exclude": ["build", "coverage"]
 }