Add comprehensive tests for DibiFluentMssqlDataSource

[ohmyfelix]

Summary

This PR adds a comprehensive test suite for the DibiFluentMssqlDataSource class, covering SQL generation, filtering, sorting, and pagination functionality specific to MSSQL databases.

Key Changes

• New test file: DibiFluentMssqlDataSourceTest.phpt with 8 test cases covering:
  • testGetCountRemovesOrderBy() - Verifies that getCount() removes ORDER BY clauses without affecting the original data source
  • testFilterOneDoesNotAddLimit() - Ensures filterOne() applies WHERE conditions without adding LIMIT
  • testLimitBuildsMssqlOffsetFetchSql() - Validates MSSQL-specific OFFSET/FETCH NEXT pagination syntax
  • testApplyFilterDate() - Tests date filtering with CONVERT() function for MSSQL format
  • testApplyFilterDateWithInvalidValue() - Ensures invalid dates don't modify the SQL query
  • testApplyFilterDateRangeFrom() - Tests date range filtering with only "from" date
  • testApplyFilterDateRangeTo() - Tests date range filtering with only "to" date
  • testApplyFilterDateRangeBoth() - Tests date range filtering with both dates

Notable Implementation Details

• Uses SQLite in-memory database for testing (compatible with test environment)
• Tests verify MSSQL-specific SQL patterns like CONVERT(varchar(10), ..., 112) for date formatting
• Validates that MSSQL uses OFFSET ... ROWS FETCH NEXT ... ROWS ONLY instead of LIMIT
• Includes edge cases like invalid date values and partial date ranges

https://claude.ai/code/session_014b98nLjqaV4knQWvMChyTD

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.64%. Comparing base (b8ded78) to head (ca75803).

Additional details and impacted files

@@                            Coverage Diff                            @@
##           fix/mssql-applyfiltertext-nn-escaping    #1287      +/-   ##
=========================================================================
+ Coverage                                  46.19%   46.64%   +0.45%     
=========================================================================
  Files                                         52       53       +1     
  Lines                                       2680     2714      +34     
=========================================================================
+ Hits                                        1238     1266      +28     
- Misses                                      1442     1448       +6     

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