Add unit test for the stream writer to improved line of code coverage

[18409615759]

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.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.27%. Comparing base (a64efca) to head (bdb0ada).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1898      +/-   ##
==========================================
+ Coverage   99.21%   99.27%   +0.06%     
==========================================
  Files          32       32              
  Lines       24085    24083       -2     
==========================================
+ Hits        23895    23909      +14     
+ Misses        102       93       -9     
+ Partials       88       81       -7     

Flag	Coverage Δ
unittests	99.27% <100.00%> (+0.06%)	⬆️

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[xuri]

LGTM, thanks for your contribution.