add tests

ui/marketplace/utils.test.ts

+import type { NextRouter } from 'next/router';
+
+import getQueryParamString from 'lib/router/getQueryParamString';
+import removeQueryParam from 'lib/router/removeQueryParam';
+
+import { getAppUrl } from './utils';
+
+// Mocking the dependencies
+jest.mock('lib/router/getQueryParamString');
+jest.mock('lib/router/removeQueryParam');
+
+describe('getAppUrl', () => {
+  let router: NextRouter;
+
+  beforeEach(() => {
+    router = {
+      asPath: '/current/path?someParam=value',
+      query: {
+        url: 'https://example.com/custom-path?query=value',
+      },
+    } as unknown as NextRouter;
+  });
+
+  it('should return undefined if url is undefined', () => {
+    const result = getAppUrl(undefined, router);
+    expect(result).toBeUndefined();
+  });
+
+  it('should return the custom url if origins match', () => {
+    (getQueryParamString as jest.Mock).mockReturnValue('https://example.com/custom-path?query=value');
+    const result = getAppUrl('https://example.com/app', router);
+    expect(result).toBe('https://example.com/custom-path?query=value');
+  });
+
+  it('should remove the query param and return original url if origins do not match', () => {
+    (getQueryParamString as jest.Mock).mockReturnValue('https://different.com/custom-path?query=value');
+    const result = getAppUrl('https://example.com/app', router);
+    expect(result).toBe('https://example.com/app?someParam=value');
+    expect(removeQueryParam).toHaveBeenCalledWith(router, 'url');
+  });
+
+  it('should construct the new url with custom params and hash', () => {
+    router.asPath = '/current/path?path=newPath&newParam=newValue#section';
+    const result = getAppUrl('https://example.com/app?existingParam=1', router);
+    expect(result).toBe('https://example.com/newPath?existingParam=1&newParam=newValue#section');
+  });
+
+  it('should handle url without query and hash', () => {
+    router.asPath = '/current/path';
+    const result = getAppUrl('https://example.com/app', router);
+    expect(result).toBe('https://example.com/app');
+  });
+
+  it('should handle error in custom url parsing', () => {
+    (getQueryParamString as jest.Mock).mockImplementation(() => {
+      throw new Error('Invalid URL');
+    });
+    const result = getAppUrl('https://example.com/app', router);
+    expect(result).toBe('https://example.com/app?someParam=value');
+  });
+
+  it('should handle error in target url parsing', () => {
+    router.asPath = '/current/path?invalidQuery#section';
+    const result = getAppUrl('invalid-url', router);
+    expect(result).toBe('invalid-url');
+  });
+});