finish 99% of lab2

Author: SapphireLinXu

lab2/main_test.js

@@ -2,5 +2,90 @@ const test = require('node:test');
 const assert = require('assert');
 const { Application, MailSystem } = require('./main');
 
+const fs = require('fs');
+const TestData = 'name_list.txt';
+
 // TODO: write your tests here
-// Remember to use Stub, Mock, and Spy when necessary
+// Remember to use Stub, Mock, and Spy when necessary
+
+test('MailSystem should write mail correctly', (t) => {
+    const writeMock = t.mock.fn(MailSystem.prototype.write);
+    const context = writeMock('Alice');
+    assert.strictEqual(context, 'Congrats, Alice!');
+});
+
+// test('MailSystem should write mail correctly', () => {
+//     const mailSystem = new MailSystem();
+//     const context = mailSystem.write('Alice');
+//     assert.strictEqual(context, 'Congrats, Alice!');
+// });
+
+test('MailSystem should send mail correctly', (t) => {
+    const sendMock = t.mock.fn(MailSystem.prototype.send);
+    const success = sendMock('Alice', 'Congrats, Alice!');
+    assert.strictEqual(typeof success, 'boolean');
+});
+
+test('Application should read file correctly', async (t) => {
+
+    fs.writeFileSync(TestData, 'Alice\nBob\nCharlie', 'utf8');
+
+    const getNameMock = t.mock.fn(Application.prototype.getNames);
+    const data = await getNameMock();
+
+    assert.strictEqual(data[0].length, 3);
+    assert.strictEqual(data[0][0], 'Alice');
+
+    if (fs.existsSync(TestData)) {
+        fs.unlinkSync(TestData);
+    }
+});
+
+test('Application should get random person', async (t) => {
+    const getNamesMock = t.mock.method(Application.prototype, 'getNames', async () => {
+        return [['Alice', 'Bob', 'Charlie'], []];
+    });
+    const app = new Application();
+    const person = await app.getNames();
+
+    assert.strictEqual(getNamesMock.mock.callCount(), 2);
+
+    const randomPerson = app.getRandomPerson();
+    assert.strictEqual(app.people.includes(randomPerson), true);
+
+});
+
+test('Application should select next person', async (t) => {
+    const getNamesMock = t.mock.method(Application.prototype, 'getNames', async () => {
+        return [['Alice', 'Bob', 'Charlie'], []];
+    });
+    const app = new Application();
+    const person = await app.getNames();
+
+    const selectNextPerson = app.selectNextPerson();
+    assert.strictEqual(app.selected.includes(selectNextPerson), true);
+    app.selectNextPerson();
+    app.selectNextPerson();
+    console.log(app.selected);
+    assert.strictEqual(app.selectNextPerson(), null);
+});
+
+test('Application should notify person', async (t) => {
+    t.mock.method(Application.prototype, 'getNames', async () => {
+        return [['Alice', 'Bob', 'Charlie'], []];
+    });
+    const app = new Application();
+    await app.getNames();
+
+    app.selectNextPerson();
+    console.log(app.selected);
+    const writeMock = t.mock.method(MailSystem.prototype, 'write', () => {
+        return true;
+    });
+    const sendMock = t.mock.method(MailSystem.prototype, 'send', () => {
+        return true;
+    });
+    app.notifySelected();
+    assert.strictEqual(writeMock.mock.callCount(), 1);
+    assert.strictEqual(sendMock.mock.callCount(), 1);
+});