Update main_test.js

Author: tnoo436792

lab2/main_test.js

@@ -1,6 +1,88 @@
-const test = require('node:test');
+const TestLab = require('node:test');
+const Test = require('node:test');
 const assert = require('assert');
+const fileSystem = require('fs');
+
+// 模擬 fileSystem 模組的 readFile 方法
+TestLab.mock.method(fileSystem, 'readFile', (file, options, callback) => {
+Test.mock.method(fileSystem, 'readFile', (file, options, callback) => {
+    callback(null, 'ray\nnina\neric');
+});
+
 const { Application, MailSystem } = require('./main');
 
-// TODO: write your tests here
-// Remember to use Stub, Mock, and Spy when necessary
+// 測試 MailSystem 的 write 方法
+TestLab('MailSystem_write()', () => {
+Test('MailSystem_write()', () => {
+    const mailSystem = new MailSystem();
+    assert.strictEqual(mailSystem.write('ray'), 'Congrats, ray!');
+    assert.strictEqual(mailSystem.write(null), 'Congrats, null!');
+    assert.strictEqual(mailSystem.write('3345678'), 'Congrats, 3345678!');
+});
+
+// 測試 MailSystem 的 send 方法
+TestLab('MailSystem_send()', () => {
+Test('MailSystem_send()', () => {
+    const mailSystem = new MailSystem();
+    const name = 'ray';
+    TestLab.mock.method(Math, 'random', () => 0.7); // 成功概率高
+    Test.mock.method(Math, 'random', () => 0.7); 
+    assert.strictEqual(mailSystem.send(name, 'success'), true);
+    TestLab.mock.method(Math, 'random', () => 0.3); // 失敗概率高
+    Test.mock.method(Math, 'random', () => 0.3); 
+    assert.strictEqual(mailSystem.send(name, 'fail'), false);
+});
+
+// 測試 Application 的 getNames 方法
+TestLab('Application_getNames()', async () => {
+Test('Application_getNames()', async () => {
+    const application = new Application();
+    const nameList = ['ray', 'nina', 'eric'];
+    const names = await application.getNames();
+    assert.deepStrictEqual(names, [nameList, []]);
+});
+
+// 測試 Application 的 getRandomPerson 方法
+TestLab('Application_getRandomPerson()', async () => {
+Test('Application_getRandomPerson()', async () => {
+    const application = new Application();
+    const names = await application.getNames();
+    TestLab.mock.method(Math, 'random', () => 0);
+    Test.mock.method(Math, 'random', () => 0);
+    assert.strictEqual(application.getRandomPerson(), 'ray');
+    TestLab.mock.method(Math, 'random', () => 0.4);
+    Test.mock.method(Math, 'random', () => 0.4);
+    assert.strictEqual(application.getRandomPerson(), 'nina');
+    TestLab.mock.method(Math, 'random', () => 0.7);
+    Test.mock.method(Math, 'random', () => 0.7);
+    assert.strictEqual(application.getRandomPerson(), 'eric');
+});
+
+// 測試 Application 的 selectNextPerson 方法
+TestLab('Application_selectNextPerson()', async () => {
+Test('Application_selectNextPerson()', async () => {
+    const application = new Application();
+    const names = await application.getNames();
+    application.selected = ['ray'];
+    let counter = 0;
+    TestLab.mock.method(application, 'getRandomPerson', () => {
+    Test.mock.method(application, 'getRandomPerson', () => {
+        if (counter < names[0].length) { 
+            return names[0][counter++]; 
+        } else {
+@@ -68,12 +68,12 @@ TestLab('Application_selectNextPerson()', async () => {
+});
+
+// 測試 Application 的 notifySelected 方法
+TestLab('Application_notifySelected()', async () => {
+Test('Application_notifySelected()', async () => {
+    const application = new Application();
+    application.people = ['ray', 'nina', 'eric'];
+    application.selected = ['ray', 'nina', 'eric'];
+    application.mailSystem.send = TestLab.mock.fn(application.mailSystem.send);
+    application.mailSystem.write = TestLab.mock.fn(application.mailSystem.write);
+    application.mailSystem.send = Test.mock.fn(application.mailSystem.send);
+    application.mailSystem.write = Test.mock.fn(application.mailSystem.write);
+    application.notifySelected();
+    assert.strictEqual(application.mailSystem.send.mock.calls.length, 3);
+    assert.strictEqual(application.mailSystem.write.mock.calls.length, 3);