Add unit tests for the BAHTTEXT formula function

[zhuyanhuazhuyanhua]

PR Details

Description

Related Issue

Motivation and Context

How Has This Been Tested

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[Copilot]

Pull Request Overview

Adds Thai baht text conversion and broadens DOLLAR formatting tests across cultures

• Implements BAHTTEXT logic and Thai digit/unit mappings in calc.go
• Adds TestBAHTTEXT and TestDOLLAR in calc_test.go covering zero, integer, decimal, large values, and multi‐culture scenarios

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
calc.go	Implemented numToThaiText, Thai digit/unit maps, and BAHTTEXT function
calc_test.go	Imported fmt; added TestBAHTTEXT and TestDOLLAR test suites

Comments suppressed due to low confidence (1)

calc.go:18905

• Consider adding a test case for inputs with more than two decimal places (e.g., 1.234) to verify intended rounding vs. truncation behavior.

decimalPart := int((num.Number - float64(integerPart)) * 100)

[xuri]

Thanks for your PR. Some expected value in the unit test case is incorrect, the implement in the PR #2187 returns the right results.

[xuri]

I revert changes for formula function implementation, and add unit tests for based on your branch.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.24%. Comparing base (c95ba17) to head (0b0389a).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2148      +/-   ##
==========================================
+ Coverage   98.96%   99.24%   +0.28%     
==========================================
  Files          32       32              
  Lines       30724    30724              
==========================================
+ Hits        30406    30493      +87     
+ Misses        239      153      -86     
+ Partials       79       78       -1     

Flag	Coverage Δ
unittests	99.24% <ø> (+0.28%)	⬆️

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