Lab3: add parameterized unit tests

Author: vivian921207

lab3/main_test.js

@@ -2,4 +2,61 @@ const {describe, it} = require('node:test');
 const assert = require('assert');
 const { Calculator } = require('./main');
 
-// TODO: write your tests here
+const calc = new Calculator();
+
+describe('Calculator', () => {
+    // exp() 正確結果
+    it('exp() should return correct results', () => {
+        const cases = [
+            { param: 0, expected: Math.exp(0) },
+            { param: 1, expected: Math.exp(1) },
+            { param: -1, expected: Math.exp(-1) },
+        ];
+        for (const c of cases) {
+            assert.strictEqual(calc.exp(c.param), c.expected);
+        }
+    });
+
+    // exp() 錯誤處理 unsupported operand
+    it('exp() should throw unsupported operand type', () => {
+        const inputs = [Infinity, -Infinity, NaN];
+        for (const x of inputs) {
+            assert.throws(() => calc.exp(x), { message: 'unsupported operand type' });
+        }
+    });
+
+    // exp() overflow
+    it('exp() should throw overflow for large number', () => {
+        assert.throws(() => calc.exp(1000), { message: 'overflow' });
+    });
+
+    // log() 正確結果
+    it('log() should return correct results', () => {
+        const cases = [
+            { param: 1, expected: Math.log(1) },
+            { param: Math.E, expected: Math.log(Math.E) },
+            { param: 10, expected: Math.log(10) },
+        ];
+        for (const c of cases) {
+            assert.strictEqual(calc.log(c.param), c.expected);
+        }
+    });
+
+    // log() 錯誤處理 unsupported operand
+    it('log() should throw unsupported operand type', () => {
+        const inputs = [Infinity, -Infinity, NaN];
+        for (const x of inputs) {
+            assert.throws(() => calc.log(x), { message: 'unsupported operand type' });
+        }
+    });
+
+    // log() math domain error (1)
+    it('log() should throw math domain error (1) for 0', () => {
+        assert.throws(() => calc.log(0), { message: 'math domain error (1)' });
+    });
+
+    // log() math domain error (2)
+    it('log() should throw math domain error (2) for negative input', () => {
+        assert.throws(() => calc.log(-3), { message: 'math domain error (2)' });
+    });
+});