refactor: move encode HTML function tests into separate module (#4593)

Co-authored-by: Alexandr <qwerty541zxc@gmail.com>

tests/html.test.js

@@ -0,0 +1,10 @@
+import { describe, expect, it } from "@jest/globals";
+import { encodeHTML } from "../src/common/html.js";
+
+describe("Test html.js", () => {
+  it("should test encodeHTML", () => {
+    expect(encodeHTML(`<html>hello world<,.#4^&^@%!))`)).toBe(
+      "&#60;html&#62;hello world&#60;,.#4^&#38;^@%!))",
+    );
+  });
+});

tests/render.test.js

@@ -4,15 +4,8 @@ import { describe, expect, it } from "@jest/globals";
 import { queryByTestId } from "@testing-library/dom";
 import "@testing-library/jest-dom/jest-globals";
 import { renderError } from "../src/common/render.js";
-import { encodeHTML } from "../src/common/html.js";
 
 describe("Test render.js", () => {
-  it("should test encodeHTML", () => {
-    expect(encodeHTML(`<html>hello world<,.#4^&^@%!))`)).toBe(
-      "&#60;html&#62;hello world&#60;,.#4^&#38;^@%!))",
-    );
-  });
-
   it("should test renderError", () => {
     document.body.innerHTML = renderError({ message: "Something went wrong" });
     expect(