Lab2

lab2/main_test.js

@@ -1,6 +1,91 @@
 const test = require('node:test');
 const assert = require('assert');
-const { Application, MailSystem } = require('./main');
+// filesystem module
+const fs = require("fs");
 
 // TODO: write your tests here
-// Remember to use Stub, Mock, and Spy when necessary
+// Remember to use Stub, Mock, and Spy when necessary
+
+// 透過mock方法模擬fs.readFile函數的行為，當讀檔時，不是讀取真實的檔案內容，而是返回模擬的內容
+test.mock.method(fs, "readFile", (path, encoding, callback) => {
+  callback(null, "test1\ntest2");
+});
+
+const { Application, MailSystem } = require('./main');
+
+// Write Fuction Test
+test("Write", async () => {
+  const mailSystem = new MailSystem();
+  assert.strictEqual(mailSystem.write("Write Test"), "Congrats, Write Test!");
+});
+
+
+// Send Function Test
+test("Send", async () => {
+  const mailSystem = new MailSystem();
+  // 模擬Math.random函數，使其返回固定值1
+  test.mock.method(Math, "random", () => 1);
+  // 在Math.random返回1的情況下，測試send方法的返回值
+  assert.strictEqual(mailSystem.send("Test", "Test_success"), true);
+  // 改變Math.random的模擬返回值為0
+  test.mock.method(Math, "random", () => 0);
+  // 在Math.random返回0的情況下，測試send方法的返回值
+  assert.strictEqual(mailSystem.send("Test", "Test_fail"), false);
+  // 恢復所有模擬的方法到其原始狀態
+  test.mock.restoreAll();
+});
+
+test("Application.getNames", async () => {
+  const app = new Application();
+  const [people, selected] = await app.getNames();
+  assert.deepStrictEqual(people, ["test1", "test2"]);
+  assert.deepStrictEqual(selected, []);
+});
+
+test("Application.getRandomPerson", async () => {
+  // 模擬getNames方法的行為
+  test.mock.method(Application.prototype, "getNames", async () => [
+    ["test1", "test2"],
+    [],
+  ]);
+  const app = new Application();
+  console.log(await app.getNames()); // 僅用於等待構造函數
+  // 模擬Math.random函數，使其返回固定值0
+  test.mock.method(Math, "random", () => 0);
+  assert.strictEqual(app.getRandomPerson(), "test1");
+  // 改變Math.random的模擬返回值為0.99
+  test.mock.method(Math, "random", () => 0.99);
+  assert.strictEqual(app.getRandomPerson(), "test2");
+  // 恢復所有模擬的方法到其原始狀態
+  test.mock.restoreAll();
+});
+
+test("Application.selectNextPerson", async () => {
+  const app = new Application();
+  app.people = ["test1", "test2"];
+  app.selected = ["test1"];
+  let ocur = 0;
+  // 模擬getRandomPerson方法的行為，並控制其返回值
+  test.mock.method(app, "getRandomPerson", () => {
+    // mock僅重新出現一次
+    if (ocur === 0) {
+      ocur++;
+      return "test1";
+    }
+    return "test2";
+  });
+  assert.strictEqual(app.selectNextPerson(), "test2");
+  assert.strictEqual(app.selectNextPerson(), null);
+  // 恢復所有模擬的方法到其原始狀態
+  test.mock.restoreAll();
+});
+
+test("Application.notifySelected", async () => {
+  const app = new Application();
+  app.people = ["test1", "test2"];
+  app.selected = ["test1", "test2"];
+  // 對MailSystem類的send方法進行模擬
+  test.mock.method(MailSystem.prototype, "send");
+  app.notifySelected();
+  assert.strictEqual(app.mailSystem.send.mock.calls.length, 2);
+});