feat: tests for the unescapeHTML utils function

Author: andreishket

vis/test/utils/unescapeHTMLentities.test.ts

@@ -0,0 +1,39 @@
+import { describe } from "vitest";
+import { unescapeHTML } from "../../js/utils/unescapeHTMLentities";
+
+describe("Unescape HTML entities function", () => {
+  it("Single HTML entities decoded", () => {
+    expect(unescapeHTML("&")).toBe("&");
+    expect(unescapeHTML("&lt;")).toBe("<");
+    expect(unescapeHTML("&gt;")).toBe(">");
+    expect(unescapeHTML("&quot;")).toBe('"');
+    expect(unescapeHTML("&#34;")).toBe('"');
+    expect(unescapeHTML("&#39;")).toBe("'");
+    expect(unescapeHTML("&#x2F;")).toBe("/");
+    expect(unescapeHTML("&#x60;")).toBe("`");
+    expect(unescapeHTML("&#x3D;")).toBe("=");
+  });
+
+  it("Multiple entities in a single string decoded", () => {
+    const input =
+      "&lt;div class=&#34;test&#34;&gt;Hello &amp; Welcome&#x2F;&lt;&#x2F;div&gt;";
+    const expected = '<div class="test">Hello & Welcome/</div>';
+    expect(unescapeHTML(input)).toBe(expected);
+  });
+
+  it("String unchanged if no entities present", () => {
+    const input = "Plain text with no HTML entities";
+    expect(unescapeHTML(input)).toBe(input);
+  });
+
+  it("Empty string input handled", () => {
+    expect(unescapeHTML("")).toBe("");
+  });
+
+  it("Non-string input converted to string", () => {
+    expect(unescapeHTML(123 as any as string)).toBe("123");
+    expect(unescapeHTML(null as any)).toBe("null");
+    expect(unescapeHTML(undefined as any)).toBe("undefined");
+    expect(unescapeHTML(true as any)).toBe("true");
+  });
+});