Update main_test.js

Author: kalakala

lab3/main_test.js

@@ -1,5 +1,26 @@
-const {describe, it} = require('node:test');
+const { describe, it } = require('node:test');
 const assert = require('assert');
 const { Calculator } = require('./main');
 
-// TODO: write your tests here
+describe('Calculator', () => {
+    const calculator = new Calculator();
+
+    describe('exp()', () => {
+        it('should return correct exponentiation results', () => {
+            assert.strictEqual(calculator.exp(0), 1);
+            assert.strictEqual(calculator.exp(1), Math.exp(1));
+            assert.strictEqual(calculator.exp(-1), Math.exp(-1));
+            assert.strictEqual(calculator.exp(5), Math.exp(5));
+        });
+
+        it('should throw an error for non-finite numbers', () => {
+            assert.throws(() => calculator.exp(Infinity), /unsupported operand type/);
+            assert.throws(() => calculator.exp(-Infinity), /unsupported operand type/);
+            assert.throws(() => calculator.exp(NaN), /unsupported operand type/);
+        });
+
+        it('should throw an overflow error for large numbers', () => {
+            assert.throws(() => calculator.exp(1000), /overflow/);
+        });
+    });
+});