4/12 lab3

Author: soymilk05

lab3/main_test.js

@@ -1,5 +1,68 @@
-const { describe, it } = require('node:test');
+const {test,mock} = require('node:test');
 const assert = require('assert');
-const { Calculator } = require('./main');
+const fs = require('fs')
+mock.method(fs, 'readFile', (file, options, callback) => {
+    callback(null, 'sam\njack\njim');
+});
+const { Application, MailSystem } = require('./main');
 
-// TODO: write your tests here
+
+
+test('write', () => {
+    const mailSystem = new MailSystem()
+    assert.strictEqual(mailSystem.write('sam'),'Congrats, sam!')
+    assert.strictEqual(mailSystem.write(123),'Congrats, 123!')
+    assert.strictEqual(mailSystem.write(null),'Congrats, null!')
+
+});
+
+
+test('send',()=>{
+    const mailSystem = new MailSystem()
+    mock.method(Math, 'random', () => 0.9);
+    assert.strictEqual(mailSystem.send('sam','hello world'),true)
+    mock.method(Math, 'random', () => 0.1);
+    assert.strictEqual(mailSystem.send('sam','hello world'),false)
+})
+
+
+test('getNames', async () => {
+    const app = new Application();
+    const names = await app.getNames();
+    assert.deepStrictEqual(names, [['sam', 'jack','jim'],[]]);
+});
+
+
+test('getRandomPerson',async ()=>{
+    const app = new Application();
+    await app.getNames();
+    mock.method(Math,'random',()=>0.5)
+    const person = app.getRandomPerson()
+    assert.strictEqual(person,app.people[Math.floor(0.5*app.people.length)])
+})
+
+
+
+test('selectNextPerson', async ()=>{
+    const app = new Application();
+    await app.getNames();
+    app.selected = ['sam']
+    let i = 0
+    mock.method(app, 'getRandomPerson', () => app.people[i++]);
+    assert.strictEqual(app.selectNextPerson(),'jack')
+    assert.strictEqual(app.selectNextPerson(),'jim')
+    assert.strictEqual(app.selectNextPerson(),null)
+})
+
+
+
+test('notifySelected',async ()=>{
+    const app = new Application();
+    const [names] = await app.getNames();
+    app.selected = names.slice();
+    app.mailSystem.send = mock.fn(app.mailSystem.send);
+    app.mailSystem.write = mock.fn(app.mailSystem.write);
+    app.notifySelected();
+    assert.strictEqual(app.mailSystem.send.mock.calls.length, names.length);
+    assert.strictEqual(app.mailSystem.write.mock.calls.length, names.length);
+})