finished lab2

lab2/main_test.js

@@ -1,6 +1,162 @@
 const test = require('node:test');
 const assert = require('assert');
+
+const fs = require('fs');
+const { promisify } = require('util');
+const writeFile = promisify(fs.writeFile);
+
 const { Application, MailSystem } = require('./main');
 
-// TODO: write your tests here
-// Remember to use Stub, Mock, and Spy when necessary
+
+test("Test MailSystem's write function", () => {
+    const mailSystem = new MailSystem();
+    const context = mailSystem.write('OuO');
+    assert.strictEqual(context, 'Congrats, OuO!');
+});
+
+test("Test MailSystem's send sucess", () => {
+    const mailSystem = new MailSystem();
+
+    // Do stub on Math.random to always return a value > 0.5
+    const MathRandomFunction = Math.random;
+    Math.random = () => 0.51;
+    const result = mailSystem.send('OuO', 'Hello World!');
+    assert.strictEqual(result, true);
+
+    // Recover the original Math.random function
+    Math.random = MathRandomFunction;
+});
+
+test("Test MailSystem's send failure", () => {
+    const mailSystem = new MailSystem();
+
+    // Do stub on Math.random to always return a 
+    const MathRandomFunction = Math.random;
+    Math.random = () => 0.5;
+    const result = mailSystem.send('OwO', 'Goodbye World!');
+    assert.strictEqual(result, false);
+
+    // Recover the original Math.random function
+    Math.random = MathRandomFunction;
+});
+
+test("Test Application's getNames", async () => {
+    const fakeData = `Holo\nGawr_Gura\nOuO\nOwO\nOOAAAOooooAAOOOAOZZzzzz`;
+    const fakeFile = 'name_list.txt';
+    await writeFile(fakeFile, fakeData, 'utf8');
+
+    const application = new Application();
+    const [people, selected] = await application.getNames();
+
+    assert.deepStrictEqual(people, ['Holo', 'Gawr_Gura', 'OuO', 'OwO', 'OOAAAOooooAAOOOAOZZzzzz']);
+    assert.deepStrictEqual(selected, []);
+    fs.unlinkSync(fakeFile);
+});
+
+test("Test Application's getRandomPerson", async () => {
+    const fakeData = `Holo\nGawr_Gura\nOuO\nOwO\nOOAAAOooooAAOOOAOZZzzzz`;
+    const fakeFile = 'name_list.txt';
+    await writeFile(fakeFile, fakeData, 'utf8');
+
+    const application = new Application();
+    const [people, selected] = await application.getNames();
+
+    assert.deepStrictEqual(people, ['Holo', 'Gawr_Gura', 'OuO', 'OwO', 'OOAAAOooooAAOOOAOZZzzzz']);
+    assert.deepStrictEqual(selected, []);
+
+    // See if the random person is in the list
+
+    const numberOfTests = 5;
+
+    for (let i = 0; i < numberOfTests; i++) {
+        const person = application.getRandomPerson();
+        assert.ok(application.people.includes(person));
+    }
+    fs.unlinkSync(fakeFile);
+});
+
+test("Test Application's selectNextPerson", async () => {
+    const fakeData = `Gawr_Gura\nOOAAAOooooAAOOOAOZZzzzz\nOuO`;
+    const fakeFile = 'name_list.txt';
+    await writeFile(fakeFile, fakeData, 'utf8');
+
+    const application = new Application();
+    const [people, selected] = await application.getNames();
+
+    assert.deepStrictEqual(people, ['Gawr_Gura', 'OOAAAOooooAAOOOAOZZzzzz', 'OuO']);
+    assert.deepStrictEqual(selected, []);
+
+    // Select the first person
+    application.getRandomPerson = () => {return 'Gawr_Gura'};
+    let person = application.selectNextPerson();
+    assert.strictEqual(person, 'Gawr_Gura');
+    assert.deepStrictEqual(application.selected, ['Gawr_Gura']);
+
+    // Select already selected person
+    let control = 0;
+    application.getRandomPerson = () => {
+        if (control === 0) {
+            control = 1;
+            return 'Gawr_Gura';
+        } else {
+            return 'OuO';
+        }
+    };
+    person = application.selectNextPerson();
+    assert.strictEqual(person, 'OuO');
+    assert.deepStrictEqual(application.selected, ['Gawr_Gura', 'OuO']);
+
+    // Select the third person
+    application.getRandomPerson = () => {return 'OOAAAOooooAAOOOAOZZzzzz'};
+    person = application.selectNextPerson();
+    assert.strictEqual(person, 'OOAAAOooooAAOOOAOZZzzzz');
+    assert.deepStrictEqual(application.selected, ['Gawr_Gura', 'OuO', 'OOAAAOooooAAOOOAOZZzzzz']);
+
+    // All selected
+    person = application.selectNextPerson();
+    assert.strictEqual(person, null);
+    assert.deepStrictEqual(application.selected, ['Gawr_Gura', 'OuO', 'OOAAAOooooAAOOOAOZZzzzz']);
+
+    fs.unlinkSync(fakeFile);
+});
+
+test("Test Application's notifySelected", async () => {
+    const fakeData = `Gawr_Gura\nTAT\nOuO`;
+    const fakeFile = 'name_list.txt';
+    await writeFile(fakeFile, fakeData, 'utf8');
+
+    const application = new Application();
+    const [people, selected] = await application.getNames();
+
+    assert.deepStrictEqual(people, ['Gawr_Gura', 'TAT', 'OuO']);
+    assert.deepStrictEqual(selected, []);
+
+    // Create a spy for the MailSystem's write and send methods
+    const mailSystemSpy = {
+        write: test.mock.fn(MailSystem.prototype.write),
+        send: test.mock.fn(MailSystem.prototype.send)
+    };
+    application.mailSystem = mailSystemSpy;
+    application.selected = ['Gawr_Gura', 'TAT'];
+
+    application.notifySelected();
+
+    // Check the number of calls and the arguments of the calls
+    assert.strictEqual(mailSystemSpy.write.mock.callCount(), 2);
+    assert.strictEqual(mailSystemSpy.send.mock.callCount(), 2);
+
+    // Check the arguments of the calls
+    assert.deepStrictEqual(
+        mailSystemSpy.write.mock.calls.map(
+            call => call.arguments[0]
+        ), ['Gawr_Gura', 'TAT']
+    );
+    assert.deepStrictEqual(
+        mailSystemSpy.send.mock.calls.map(
+            call => call.arguments[0]
+        ), ['Gawr_Gura', 'TAT']
+    );
+
+    // Remove the fake file
+    fs.unlinkSync(fakeFile);
+});