Remove dependency on power-assert

To not scare users with core-js deprecation warnings.

Closes #4

README.adoc

@@ -9,7 +9,6 @@
 :ESLint: link:https://eslint.org[ESLint]
 :Mocha: link:https://mochajs.org[Mocha]
 :nginx-testing: link:https://github.com/jirutka/nginx-testing[nginx-testing]
-:power-assert: link:https://github.com/power-assert-js/power-assert[power-assert]
 :Rollup: link:https://babeljs.io[Rollup]
 :yarn: link:https://yarnpkg.com/[yarn]
 :npm: link:https://docs.npmjs.com/cli/commands/npm/[npm]
@@ -194,10 +193,6 @@ The following is a list of `devDependencies` with their description.
 * {npmjs-pkg}/mocha[mocha] -- A flexible JavaScript test framework for Node.js.
 ** {npmjs-pkg}/mocha-suite-hooks[mocha-suite-hooks] -- Suite-level hooks for {Mocha}; allows to run hook before/after describe block.
 
-* {npmjs-pkg}/power-assert[power-assert] -- “Power Assert” in JavaScript. Provides descriptive assertion messages through standard assert interface.
-** {npmjs-pkg}/babel-plugin-empower-assert[babel-plugin-empower-assert] -- A {Babel} plugin to convert https://nodejs.org/api/assert.html[assert] to {power-assert} at compile time.
-** {npmjs-pkg}/babel-plugin-espower[babel-plugin-espower] -- A {Babel} plugin for {power-assert}.
-
 * {npmjs-pkg}/nginx-testing[nginx-testing] -- Support for integration/acceptance testing of nginx configuration.
 
 * {npmjs-pkg}/got[got] -- A human-friendly and powerful HTTP request library for Node.js. Used in integration tests. Do _not_ update it to version 12.x (see https://github.com/{gh-name}/issues/3[#3])!

babel.config.js

@@ -24,10 +24,5 @@ module.exports = (api) => ({
       // This is not used with Rollup.
       '@babel/plugin-transform-modules-commonjs'
     ] : [],
-    ...api.env('mocha') ? [
-      // Transform power-assert. This is used only for Mocha tests.
-      'babel-plugin-empower-assert',
-      'babel-plugin-espower',
-    ] : [],
   ],
 })

integration-tests/hello.test.ts

@@ -1,11 +1,11 @@
-import { strict as assert } from 'assert'
+import assert from 'assert/strict'
 import { test } from 'mocha'
 import './hooks'
 
 
 test('/hello?name=njs', async function () {
   const resp = await this.client.get('hello?name=njs')
 
-  assert(resp.statusCode === 200)
-  assert(resp.body.includes('Meow, njs!'))
+  assert.equal(resp.statusCode, 200)
+  assert.match(resp.body, /Meow, njs!/)
 })

package.json

@@ -43,8 +43,6 @@
     "@types/rollup-plugin-add-git-msg": "^1.1.1",
     "@typescript-eslint/eslint-plugin": "^5.59.6",
     "@typescript-eslint/parser": "^5.59.6",
-    "babel-plugin-empower-assert": "^2.0.0",
-    "babel-plugin-espower": "^3.0.1",
     "babel-preset-njs": "^0.7.0",
     "babel-register-ts": "^7.0.0",
     "eslint": "^8.40.0",
@@ -54,7 +52,6 @@
     "nginx-testing": "^0.4.0",
     "njs-types": "^0.7.12",
     "npm-run-all": "^4.1.5",
-    "power-assert": "^1.6.1",
     "rimraf": "^5.0.1",
     "rollup": "^3.22.0",
     "rollup-plugin-add-git-msg": "^1.1.0",