Extend the test coverage of build tools

[gayaldassanayake]

Purpose

$ subject

Related to #42155

Approach

Describe how you are implementing the solutions along with the design details.

Samples

Provide high-level details about the samples related to this feature.

Remarks

List any other known issues, related PRs, TODO items, or any other notes related to the PR.

Check List

• Read the Contributing Guide
• Updated Change Log
• Checked Tooling Support (#)
• Added necessary tests
  • Unit Tests
  • Spec Conformance Tests
  • Integration Tests
  • Ballerina By Example Tests
• Increased Test Coverage
• Added necessary documentation
  • API documentation
  • Module documentation in Module.md files
  • Ballerina By Examples

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.64%. Comparing base (11ec864) to head (6a25158).
Report is 109 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #42417      +/-   ##
============================================
+ Coverage     76.57%   76.64%   +0.06%     
- Complexity    53481    53538      +57     
============================================
  Files          2905     2905              
  Lines        202032   202259     +227     
  Branches      26314    26334      +20     
============================================
+ Hits         154703   155016     +313     
+ Misses        38863    38737     -126     
- Partials       8466     8506      +40     

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