feat: add test case for evaluate expression

gaurovgiri · gaurovgiri · commit 83fae7502f26 · 2023-10-05T14:12:45.000+05:45
diff --git a/Data-Structures/Stack/test/EvaluateExpression.test.js b/Data-Structures/Stack/test/EvaluateExpression.test.js
@@ -0,0 +1,22 @@
+import { evaluateExpression } from '../evaluateExpression.js';
+
+describe('evaluateExpression', () => {
+  it('should evaluate a valid expression', () => {
+    const expression = '3 4 * 2 / 5 +'; // (3 * 4) / 2 + 5 = 7
+    const result = evaluateExpression(expression);
+    expect(result).toBe(7);
+  });
+
+  it('should handle division by zero', () => {
+    const expression = '3 0 /'; // Division by zero
+    const result = evaluateExpression(expression);
+    expect(result).toBe(null);
+  });
+
+  it('should handle an invalid expression', () => {
+    const expression = '3 * 4 2 / +'; // Invalid expression
+    const result = evaluateExpression(expression);
+    expect(result).toBe(null);
+  });
+
+});
