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feat: lab3
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‎lab2/main_test.js‎

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const { test } = require('node:test');
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const assert = require('node:assert');
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const { Application, MailSystem } = require('./main.js');
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const fs = require('fs');
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/*
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function coverage testing:
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- MailSystem
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- write
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- send
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- Application
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- getNames
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- getRandomPerson
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- selectNextPerson
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- notifySelected
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*/
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test('MailSystem write test', (t) => {
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const mail = new MailSystem();
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const result = mail.write('Test');
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assert.equal(result, 'Congrats, Test!');
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});
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// Test Stub
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test('MailSystem send test', (t) => {
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const mail = new MailSystem();
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const originalRandom = Math.random;
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// Test success case
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Math.random = () => 1;
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assert.equal(mail.send('Test', 'content'), true);
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// Test failure case
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Math.random = () => 0;
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assert.equal(mail.send('Test', 'content'), false);
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Math.random = originalRandom;
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});
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// Application tests
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test('Application initialization test', async (t) => {
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// 準備測試檔案
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fs.writeFileSync('name_list.txt', 'Test1\nTest2\nTest3');
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try {
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const app = new Application();
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await new Promise(resolve => setTimeout(resolve, 100)); // 等待初始化完成
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assert(Array.isArray(app.people));
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assert(Array.isArray(app.selected));
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assert.equal(app.people.length, 3);
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assert.equal(app.selected.length, 0);
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} finally {
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// 清理測試檔案
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fs.unlinkSync('name_list.txt');
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}
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});
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test('Application selectNextPerson test', async (t) => {
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// 準備測試檔案
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fs.writeFileSync('name_list.txt', 'Test1\nTest2\nTest3');
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try {
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const app = new Application();
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await new Promise(resolve => setTimeout(resolve, 100)); // 等待初始化完成
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const person1 = app.selectNextPerson();
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assert(app.people.includes(person1));
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assert.equal(app.selected.length, 1);
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const person2 = app.selectNextPerson();
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assert(app.people.includes(person2));
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assert.equal(app.selected.length, 2);
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assert.notEqual(person1, person2);
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const person3 = app.selectNextPerson();
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assert(app.people.includes(person3));
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assert.equal(app.selected.length, 3);
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// 當所有人都被選中後，應該返回 null
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const person4 = app.selectNextPerson();
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assert.equal(person4, null);
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} finally {
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// 清理測試檔案
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fs.unlinkSync('name_list.txt');
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}
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});
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// Mock Object
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test('Application notifySelected test', async (t) => {
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// 準備測試檔案
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fs.writeFileSync('name_list.txt', 'Test1\nTest2');
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try {
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const app = new Application();
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await new Promise(resolve => setTimeout(resolve, 100)); // 等待初始化完成
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app.selectNextPerson(); // 選擇第一個人
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app.selectNextPerson(); // 選擇第二個人
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// Mock MailSystem methods
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let writeCount = 0;
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let sendCount = 0;
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app.mailSystem.write = (name) => {
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writeCount++;
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return `Congrats, ${name}!`;
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};
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app.mailSystem.send = (name, context) => {
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sendCount++;
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return true;
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};
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app.notifySelected();
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assert.equal(writeCount, 2);
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assert.equal(sendCount, 2);
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} finally {
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// 清理測試檔案
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fs.unlinkSync('name_list.txt');
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}
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});
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const test = require('node:test');
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const assert = require('assert');
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const { Application, MailSystem } = require('./main');
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// TODO: write your tests here
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// Remember to use Stub, Mock, and Spy when necessary

‎lab3/README.md‎

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# Lab3
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## Introduction
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In this lab, you will write unit tests for functions implemented in `main.js`. You can learn how to use classes and functions in it by uncommenting the code in it. (But remember don't commit them on GitHub)
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## Preparation (Important!!!)
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1. Sync fork on GitHub
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2. `git checkout -b lab3` (**NOT** your student ID !!!)
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## Requirement
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1. (40%) Write test cases in `main_test.js` and achieve 100% code coverage.
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2. (30%) For each function, parameterize their testcases to test the error-results.
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3. (30%) For each function, use at least 3 parameterized testcases to test the non-error-results.
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You can run `validate.sh` in your local to test if you satisfy the requirements.
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Please note that you must not alter files other than `main_test.js`. You will get 0 points if
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1. you modify other files to achieve requirements.
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2. you can't pass all CI on your PR.
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## Submission
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You need to open a pull request to your branch (e.g. 312XXXXXX, your student number) and contain the code that satisfies the abovementioned requirements.
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Moreover, please submit the URL of your PR to E3. Your submission will only be accepted when you present at both places.

‎lab3/main.js‎

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class Calculator {
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exp(x) {
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if (!Number.isFinite(x)) {
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throw Error('unsupported operand type');
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}
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const result = Math.exp(x);
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if (result === Infinity) {
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throw Error('overflow');
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}
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return result;
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}
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log(x) {
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if (!Number.isFinite(x)) {
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throw Error('unsupported operand type');
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}
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const result = Math.log(x);
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if (result === -Infinity) {
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throw Error('math domain error (1)');
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}
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if (Number.isNaN(result)) {
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throw Error('math domain error (2)');
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}
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return result;
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}
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}
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// const calculator = new Calculator();
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// console.log(calculator.exp(87));
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// console.log(calculator.log(48763));
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module.exports = {
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Calculator
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};

‎lab3/main_test.js‎

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const {describe, it} = require('node:test');
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const assert = require('assert');
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const { Calculator } = require('./main');
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// TODO: write your tests here

‎lab3/validate.sh‎

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#!/bin/bash
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# Check for unwanted files
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for file in *; do
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if [[ $file != "main.js" && $file != "main_test.js" && $file != "README.md" && $file != "validate.sh" ]]; then
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echo "[!] Unwanted file detected: $file."
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exit 1
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fi
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done
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node=$(which node)
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test_path="${BASH_SOURCE[0]}"
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solution_path="$(realpath .)"
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tmp_dir=$(mktemp -d -t lab3-XXXXXXXXXX)
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cd $tmp_dir
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rm -rf *
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cp $solution_path/*.js .
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result=$($"node" --test --experimental-test-coverage) ; ret=$?
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if [ $ret -ne 0 ] ; then
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echo "[!] testing fails"
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exit 1
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else
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coverage=$(echo "$result" | grep 'all files' | awk -F '|' '{print $2}' | sed 's/ //g')
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if (( $(echo "$coverage < 100" | bc -l) )); then
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echo "[!] Coverage is only $coverage%"
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exit 1
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else
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echo "[V] Coverage is 100%"
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fi
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fi
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rm -rf $tmp_dir
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exit 0
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# vim: set fenc=utf8 ff=unix et sw=2 ts=2 sts=2:

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