feat: lab3

Author: CTHua

lab2/main_test.js

@@ -1,77 +1,6 @@
 const test = require('node:test');
 const assert = require('assert');
-const { mock } = require('node:test');  // 使用 node:test 內建 Mock
 const { Application, MailSystem } = require('./main');
 
-test("Test MailSystem's write method", () => {
-    const mailSystem = new MailSystem();
-    const result = mailSystem.write("Alice");
-    assert.strictEqual(result, "Congrats, Alice!");
-});
-
-test("Test MailSystem's send method with Stub", () => {
-    const mailSystem = new MailSystem();
-
-    // 使用 node:test 內建 mock 來 Stub `Math.random`
-    mock.method(global.Math, "random", () => 0.6);
-    assert.strictEqual(mailSystem.send("Bob", "Congrats, Bob!"), true);
-
-    mock.method(global.Math, "random", () => 0.4);
-    assert.strictEqual(mailSystem.send("Bob", "Congrats, Bob!"), false);
-});
-
-test("Test Application's getNames method with Stub", async () => {
-    // 先 Stub `Application.prototype.getNames()`，避免 `constructor()` 內部讀取檔案
-    mock.method(Application.prototype, 'getNames', async () => [["Alice", "Bob", "Charlie"], []]);
-
-    // **現在才建立 `Application` 物件**
-    const app = new Application();
-
-    // 呼叫 `getNames()`，確保它回傳 Stub 值
-    const [people, selected] = await app.getNames();
-
-    assert.deepStrictEqual(people, ["Alice", "Bob", "Charlie"]);
-    assert.deepStrictEqual(selected, []);
-});
-
-test("Test Application's selectNextPerson with Spy", () => {
-    // 先 Stub `getNames()` 避免 `constructor()` 內部讀取檔案
-    mock.method(Application.prototype, 'getNames', async () => [["Alice", "Bob", "Charlie"], []]);
-
-    // 創建 `Application` 實例
-    const app = new Application();
-
-    // 手動設置 `people` 和 `selected`
-    app.people = ["Alice", "Bob", "Charlie"];
-    app.selected = [];
-
-    // Spy `getRandomPerson`
-    const spy = mock.method(app, "getRandomPerson", () => "Bob");
-
-    // 測試 `selectNextPerson()`
-    const person1 = app.selectNextPerson();
-    assert.ok(spy.mock.calls.length > 0); // 確保 `getRandomPerson()` 被呼叫
-    assert.ok(app.selected.includes("Bob"));
-});
-
-test("Test Application's notifySelected using Mock", () => {
-    // 先 Stub `getNames()`，避免 `constructor()` 內部讀取 `name_list.txt`
-    mock.method(Application.prototype, 'getNames', async () => [["Alice", "Bob"], []]);
-
-    // 創建 `Application` 物件
-    const app = new Application();
-
-    // 手動設定 `selected`
-    app.selected = ["Alice", "Bob"];
-
-    // Mock `MailSystem.write()` 和 `send()`
-    const mockMailSystem = mock.method(app.mailSystem, "write", (name) => "Mocked content");
-    const mockSend = mock.method(app.mailSystem, "send", (name, content) => true);
-
-    // 測試 `notifySelected()`
-    app.notifySelected();
-
-    // 確保 Mock 方法被正確呼叫
-    assert.ok(mockMailSystem.mock.calls.length === 2);
-    assert.ok(mockSend.mock.calls.length === 2);
-});
+// TODO: write your tests here
+// Remember to use Stub, Mock, and Spy when necessary

lab3/README.md

@@ -0,0 +1,29 @@
+# Lab3
+
+## Introduction
+
+In this lab, you will write unit tests for functions implemented in `main.js`. You can learn how to use classes and functions in it by uncommenting the code in it. (But remember don't commit them on GitHub)
+
+## Preparation (Important!!!)
+
+1. Sync fork on GitHub
+2. `git checkout -b lab3` (**NOT** your student ID !!!)
+
+## Requirement
+
+1. (40%) Write test cases in `main_test.js` and achieve 100% code coverage.
+2. (30%) For each function, parameterize their testcases to test the error-results.
+3. (30%) For each function, use at least 3 parameterized testcases to test the non-error-results.
+
+You can run `validate.sh` in your local to test if you satisfy the requirements.
+
+Please note that you must not alter files other than `main_test.js`. You will get 0 points if
+
+1. you modify other files to achieve requirements.
+2. you can't pass all CI on your PR.
+
+## Submission
+
+You need to open a pull request to your branch (e.g. 312XXXXXX, your student number) and contain the code that satisfies the abovementioned requirements.
+
+Moreover, please submit the URL of your PR to E3. Your submission will only be accepted when you present at both places.

lab3/main.js

@@ -0,0 +1,34 @@
+class Calculator {
+    exp(x) {
+        if (!Number.isFinite(x)) {
+            throw Error('unsupported operand type');
+        }
+        const result = Math.exp(x);
+        if (result === Infinity) {
+            throw Error('overflow');
+        }
+        return result;
+    }
+
+    log(x) {
+        if (!Number.isFinite(x)) {
+            throw Error('unsupported operand type');
+        }
+        const result = Math.log(x);
+        if (result === -Infinity) {
+            throw Error('math domain error (1)');
+        }
+        if (Number.isNaN(result)) {
+            throw Error('math domain error (2)');
+        }
+        return result;
+    }
+}
+
+// const calculator = new Calculator();
+// console.log(calculator.exp(87));
+// console.log(calculator.log(48763));
+
+module.exports = {
+    Calculator
+};

lab3/main_test.js

@@ -0,0 +1,5 @@
+const {describe, it} = require('node:test');
+const assert = require('assert');
+const { Calculator } = require('./main');
+
+// TODO: write your tests here

lab3/validate.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Check for unwanted files
+for file in *; do
+  if [[ $file != "main.js" && $file != "main_test.js" && $file != "README.md" && $file != "validate.sh" ]]; then
+    echo "[!] Unwanted file detected: $file."
+    exit 1
+  fi
+done
+
+node=$(which node)
+test_path="${BASH_SOURCE[0]}"
+solution_path="$(realpath .)"
+tmp_dir=$(mktemp -d -t lab3-XXXXXXXXXX)
+
+cd $tmp_dir
+
+rm -rf *
+cp $solution_path/*.js .
+result=$($"node" --test --experimental-test-coverage) ; ret=$?
+if [ $ret -ne 0 ] ; then
+  echo "[!] testing fails"
+  exit 1
+else
+  coverage=$(echo "$result" | grep 'all files' | awk -F '|' '{print $2}' | sed 's/ //g')
+  if (( $(echo "$coverage < 100" | bc -l) )); then
+    echo "[!] Coverage is only $coverage%"
+    exit 1
+  else
+    echo "[V] Coverage is 100%"
+  fi
+fi
+
+rm -rf $tmp_dir
+
+exit 0
+
+# vim: set fenc=utf8 ff=unix et sw=2 ts=2 sts=2: