Add frontend widget test coverage

[mshriver]

Summary by Sourcery

Tests:

• Introduce a new Jest test suite for the generic bar widget in the frontend.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds initial Jest test coverage for the generic bar frontend widget by introducing a new test file.

File-Level Changes

Change	Details	Files
Introduce test coverage for the generic bar widget.	Create a new Jest test file for the generic bar widget component Define render/setup helpers to mount the widget in a test environment Add unit tests that cover the widget’s core rendering behavior and key interactions/edge cases	frontend/src/widgets/generic-bar.test.js

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[Copilot]

Pull request overview

This PR adds comprehensive test coverage for the GenericBarWidget component, a chart widget that displays test result data in a stacked bar chart format.

• Adds 456 lines of test coverage for the GenericBarWidget component
• Includes tests for rendering, data fetching, props handling, error states, and user interactions
• Sets up appropriate mocks for PatternFly chart components, HTTP client, and internal components

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.19%. Comparing base (83fe65d) to head (9d60e4d).

❌ Your project check has failed because the head coverage (57.19%) is below the target coverage (85.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #758      +/-   ##
==========================================
+ Coverage   54.58%   57.19%   +2.60%     
==========================================
  Files         151      151              
  Lines        7335     7335              
  Branches      652      652              
==========================================
+ Hits         4004     4195     +191     
+ Misses       3064     2873     -191     
  Partials      267      267              

see 5 files with indirect coverage changes

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