test: add ConjunctionContainer test cases

[keita-determined]

Ticket

ET-201

Description

Add ConjunctionContainer test cases

Test Plan

• CI passes
• coverage should be more than 80% (ConjunctionContainer component)

Checklist

• Changes have been manually QA'd
• New features have been approved by the corresponding PM
• User-facing API changes have the "User-facing API Change" label
• Release notes have been added as a separate file under docs/release-notes/
  See Release Note for details.
• Licenses have been included for new code which was copied and/or modified from any external code

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.22%. Comparing base (651264b) to head (93aac11).
Report is 7 commits behind head on main.

❗ Current head 93aac11 differs from pull request most recent head c02e617

Please upload reports for the commit c02e617 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9541      +/-   ##
==========================================
- Coverage   49.80%   45.22%   -4.58%     
==========================================
  Files        1247      923     -324     
  Lines      162243   121910   -40333     
  Branches     2888     2888              
==========================================
- Hits        80805    55137   -25668     
+ Misses      81266    66602   -14664     
+ Partials      172      171       -1     

Flag	Coverage Δ
harness	?
web	46.22% <ø> (+0.06%)	⬆️

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see 325 files with indirect coverage changes