Merge pull request #207 from SapphireLinXu/lab3

[LAB3] 312553027

Author: CTHua

lab3/main_test.js

@@ -3,3 +3,44 @@ const assert = require('assert');
 const { Calculator } = require('./main');
 
 // TODO: write your tests here
+
+describe('Calculator', () => {
+    
+    it('should calculate exp correctly', () => {
+        const testcases = [
+            [Infinity, 'unsupported operand type'],
+            [Number.MAX_VALUE, 'overflow'],
+            [1, Math.exp(1)],
+            [0, Math.exp(0)],
+            [-1, Math.exp(-1)]
+        ];
+        const calculator = new Calculator();
+        for (const [input, expected] of testcases) {
+            if (typeof expected === 'string') {
+                assert.throws(() => calculator.exp(input), Error);
+            } else {
+                assert.strictEqual(calculator.exp(input), expected);
+            }
+        }
+    });
+
+    it('should calculate log correctly', () => {
+        const testcases = [
+            [Infinity, 'unsupported operand type'],
+            [0, 'unsupported operand type'],
+            [-1, 'unsupported operand type'],
+            [1, Math.log(1)],
+            [100, Math.log(100)],
+            [Math.E, Math.log(Math.E)]
+        ];
+        const calculator = new Calculator();
+        for (const [input, expected] of testcases) {
+            if (typeof expected === 'string') {
+                assert.throws(() => calculator.log(input), Error);
+            } else {
+                assert.strictEqual(calculator.log(input), expected);
+            }
+        }
+    });
+});
+