Improve portal function tests to return mock URLs and verify parameters

[Copilot]

Improve tests for portal functions

• Understand the issue and current implementation
• Update UrlServiceScriptTest.java to return mock URLs instead of parameter toString()
• Update url-test.js to verify the mock URL format
• Add parameter verification using ArgumentCaptor and Mockito verify
• Update example files to work with mock URLs
• Replace indexOf checks with exact assertEquals for precise URL validation
• Run tests to ensure everything works
• Verify the changes are minimal and targeted

Original prompt

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This section details on the original issue you should resolve

<issue_title>Improve tests for portal functions</issue_title>
<issue_description>Currently, tests return a URL as projection of parameters to a string.
Tests must return a (mock) URL and check input parameters</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Improve tests for portal functions #10988

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[rymsha]

@copilot instead of indexOff assertEquals - exact string equality should be used

[Copilot]

@copilot instead of indexOff assertEquals - exact string equality should be used

Changed all indexOf checks to exact assertEquals for precise URL validation in commit 90a5b0a.