add test

Author: dunghenry

test/index.js

@@ -0,0 +1,22 @@
+function add(a, b) {
+  return a + b
+}
+function subtract(a, b) {
+  return a - b
+}
+function multiply(a, b) {
+  return a * b
+}
+function divide(a, b) {
+  return a / b
+}
+function power(a, b) {
+  return a ** b
+}
+module.exports = {
+  add,
+  subtract,
+  multiply,
+  divide,
+  power
+}

test/index.test.js

@@ -0,0 +1,18 @@
+const test = require('node:test');
+const assert = require('assert/strict');
+const { add, subtract, multiply, divide, power } = require('.');
+test('add', () => {
+    assert.equal(add(1, 2), 3);
+});
+test('subtract', () => {
+    assert.equal(subtract(1, 2), -1);
+});
+test('multiply', () => {
+    assert.equal(multiply(1, 2), 2);
+});
+test('divide', () => {
+    assert.equal(divide(1, 2), 0.5);
+});
+test('power', () => {
+    assert.equal(power(2, 2), 4);
+});

test/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "test",
+  "version": "1.0.0",
+  "main": "index.js",
+  "license": "MIT"
+}