diff --git a/script.test.js b/script.test.js
new file mode 100644
index 0000000..8546372
--- /dev/null
+++ b/script.test.js
@@ -0,0 +1,43 @@
+import { JSDOM } from "jsdom";
+import { describe, expect, it } from "jest";
+
+const { JSDOM as dom } = require("jsdom");
+
+describe("generateQR function", () => {
+ let domElement;
+
+ beforeEach(() => {
+ domElement = new JSDOM(`
+
+
+
+
+
+
+
+
+ `);
+ });
+
+ afterEach(() => {
+ domElement.window.document.body.innerHTML = "";
+ });
+
+ it("should call alert when input is empty string with leading/trailing whitespace", () => {
+ const inputElement = domElement.window.document.getElementById("text");
+ inputElement.value = " ";
+ domElement.window.document.body.innerHTML += "";
+ const alertCall = domElement.window.console.mock.calls.length - 1;
+ expect(domElement.window.console.log).toHaveBeenCalledTimes(alertCall);
+ expect(domElement.window.console.log).toHaveBeenCalledWith("Please enter text or URL");
+ });
+
+ it("should call alert when input is empty string with no leading/trailing whitespace", () => {
+ const inputElement = domElement.window.document.getElementById("text");
+ inputElement.value = "";
+ domElement.window.document.body.innerHTML += "";
+ const alertCall = domElement.window.console.mock.calls.length - 1;
+ expect(domElement.window.console.log).toHaveBeenCalledTimes(alertCall);
+ expect(domElement.window.console.log).toHaveBeenCalledWith("Please enter text or URL");
+ });
+});
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