test: modified I press function to add MTMOODLE-109 compatibility

[dadalid-at-wiris]

Description

Added compatibility with MTMOODLE-109
The blocks have a unique identifier, so they need to be found via id contains instead of id=

Type of Change

Please delete options that are not relevant.

• Feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Chore (non-breaking change that doesn't add any functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (changes to documentation only)
• Refactoring (non-breaking change that improves the code structure)
• Test

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings or errors
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• New and existing unit tests pass locally with my changes

How should be tested? (Manual or Automated Tests)

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce,also list any relevant details for your test configuration.

• Manual tests: I have tested this changes manually.