diff --git a/script.test.js b/script.test.js
new file mode 100644
index 0000000..d6836ab
--- /dev/null
+++ b/script.test.js
@@ -0,0 +1,40 @@
+import { JSDOM } from "jsdom";
+import { describe, it, expect } from "jest";
+import script from "./script.js";
+
+const dom = new JSDOM(`
+
+
+
+ QR Code Generator
+
+
+
+
+
+
+
+
+
+`);
+
+// Use globalThis to access global variables
+globalThis.document = dom.window.document;
+globalThis.window = dom.window;
+
+describe("generateQR function", () => {
+ it("should alert user when input is empty", () => {
+ const inputField = dom.window.document.getElementById("text");
+ inputField.value = "";
+ dom.window.document.getElementById("generateButton").click();
+ expect(dom.window.alert).toHaveBeenCalledTimes(1);
+ expect(dom.window.alert).toHaveBeenCalledWith("Please enter text or URL");
+ });
+
+ it("should throw error when input is not a string", () => {
+ const inputField = dom.window.document.getElementById("text");
+ inputField.value = 123;
+ dom.window.document.getElementById("generateButton").click();
+ expect(dom.window.console.error).toHaveBeenCalledTimes(1);
+ });
+});
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