lab3 with 100% coverage

lab3/main_test.js

@@ -3,3 +3,63 @@ const assert = require('assert');
 const { Calculator } = require('./main');
 
 // TODO: write your tests here
+describe('Calculator', () => {
+    const calculator = new Calculator();
+
+    describe('exp(x)', () => {
+        // 測試正常情況
+        const normalCases = [
+            { input: 0, expected: 1 },
+            { input: 1, expected: Math.E },
+            { input: -1, expected: 1/Math.E }
+        ];
+
+        normalCases.forEach(({ input, expected }) => {
+            it(`should correctly calculate exp(${input})`, () => {
+                assert.strictEqual(calculator.exp(input), expected);
+            });
+        });
+
+        // 測試錯誤情況
+        const errorCases = [
+            { input: Infinity, error: 'unsupported operand type' },
+            { input: NaN, error: 'unsupported operand type' },
+            { input: 1000, error: 'overflow' }  // 大數會造成溢位
+        ];
+
+        errorCases.forEach(({ input, error }) => {
+            it(`should throw error for exp(${input})`, () => {
+                assert.throws(() => calculator.exp(input), { message: error });
+            });
+        });
+    });
+
+    describe('log(x)', () => {
+        // 測試正常情況
+        const normalCases = [
+            { input: 1, expected: 0 },
+            { input: Math.E, expected: 1 },
+            { input: 10, expected: Math.log(10) }
+        ];
+
+        normalCases.forEach(({ input, expected }) => {
+            it(`should correctly calculate log(${input})`, () => {
+                assert.strictEqual(calculator.log(input), expected);
+            });
+        });
+
+        // 測試錯誤情況
+        const errorCases = [
+            { input: Infinity, error: 'unsupported operand type' },
+            { input: NaN, error: 'unsupported operand type' },
+            { input: 0, error: 'math domain error (1)' },
+            { input: -1, error: 'math domain error (2)' }
+        ];
+
+        errorCases.forEach(({ input, error }) => {
+            it(`should throw error for log(${input})`, () => {
+                assert.throws(() => calculator.log(input), { message: error });
+            });
+        });
+    });
+});