test(utils): add unit tests for parseQuery function

- Introduce comprehensive tests for the parseQuery utility.
- Validate handling of single and multi-value query parameters.
- Ensure empty query strings return an empty object.
- Confirm repeated keys are grouped into arrays.

Signed-off-by: Max P. <Mail@MPassarello.de>

src/Utils/__tests__/parseQuery.test.ts

@@ -0,0 +1,49 @@
+import { assertEquals } from 'https://deno.land/std/assert/mod.ts';
+import { parseQuery } from '../parseQuery.ts';
+
+Deno.test('parseQuery: single-value parameters are parsed as strings', () => {
+    const url = new URL('http://localhost?foo=bar&limit=10');
+    const result = parseQuery(url.searchParams);
+
+    assertEquals(result, {
+        foo: 'bar',
+        limit: '10',
+    });
+});
+
+Deno.test('parseQuery: multi-value parameters are parsed as string arrays', () => {
+    const url = new URL('http://localhost?tag=ts&tag=deno&tag=web');
+    const result = parseQuery(url.searchParams);
+
+    assertEquals(result, {
+        tag: ['ts', 'deno', 'web'],
+    });
+});
+
+Deno.test('parseQuery: mixed single and multi-value parameters', () => {
+    const url = new URL(
+        'http://localhost?sort=asc&filter=active&filter=pending',
+    );
+    const result = parseQuery(url.searchParams);
+
+    assertEquals(result, {
+        sort: 'asc',
+        filter: ['active', 'pending'],
+    });
+});
+
+Deno.test('parseQuery: empty query string returns empty object', () => {
+    const url = new URL('http://localhost');
+    const result = parseQuery(url.searchParams);
+
+    assertEquals(result, {});
+});
+
+Deno.test('parseQuery: repeated single-value keys are grouped', () => {
+    const url = new URL('http://localhost?a=1&a=2&a=3');
+    const result = parseQuery(url.searchParams);
+
+    assertEquals(result, {
+        a: ['1', '2', '3'],
+    });
+});