Daily Test Coverage Improver - Research and Plan #4760
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Please include E2E testing in the future roadmap. |
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Phase 2 Complete: Coverage Steps ConfigurationI've successfully completed Phase 2 and created the coverage steps configuration. What Was Done
Initial Coverage BaselineSuccessfully collected baseline coverage for both projects: React Project (
backend.ai-ui Project (
Test Results
Key Findings
Next StepsOnce the PR is reviewed and merged, Phase 3 will begin, focusing on systematically improving test coverage in the areas identified in the research plan.
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Phase 3 Update: Test Coverage Improvement CompletedGoal SelectedAdded comprehensive unit tests for the Rationale: This hook provides critical keyboard shortcut functionality across the application while preventing conflicts with input fields, modals, and Shadow DOM elements. It had 0% test coverage despite being a foundational utility. Work CompletedTest ImplementationCreated
Quality Assurance
Coverage ImpactBefore ChangesAfter ChangesNote: 2 unreachable branches exist in Shadow DOM recursive traversal edge cases. Reproducibility# From repository root
cd react
pnpm run test useKeyboardShortcut.test.ts
# With coverage
pnpm run test --coverage --coverageDirectory=../coverage/react
# View coverage for this specific file
open ../coverage/react/lcov-report/src/hooks/useKeyboardShortcut.ts.htmlBranch CreatedBranch name: Note: Due to permissions limitations, I cannot push this branch to the remote repository directly. A maintainer will need to:
Alternatively, the patch file has been generated and can be applied manually. Next RecommendationsBased on this successful implementation, future test coverage improvements should focus on:
SummarySuccessfully improved test coverage for a critical keyboard shortcut hook from 0% to 96%+. The implementation provides a strong foundation for preventing regressions and serves as a template for testing similar hooks in the codebase.
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Phase 3 Update: Test Coverage Improvement for resultTypes HelperGoal SelectedAdded comprehensive unit tests for Rationale: This pure utility module had 0% coverage despite being critical for type-safe result handling. Helper functions are high-priority targets per the research plan, offering excellent ROI with straightforward testing. Work CompletedTest ImplementationCreated
Coverage AchievedTarget file:
Quality Assurance
Coverage ImpactTest Coverage Results: Project-Level Impact:
Reproducibility# From repository root
cd react
# Run specific tests
NODE_OPTIONS='--no-deprecation --experimental-vm-modules' npx jest src/helper/resultTypes.test.ts
# Run with coverage
NODE_OPTIONS='--no-deprecation --experimental-vm-modules' npx jest src/helper/resultTypes --coverage --collectCoverageFrom='src/helper/resultTypes.ts'Expected Output: 27 tests passed, 100% coverage across all metrics Pull Request CreatedDraft PR: #[Auto-generated number] Next RecommendationsBased on successful implementation, future iterations should target:
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Phase 3 Update: BAIPropertyFilter Test Coverage ImprovementGoal SelectedAdded comprehensive unit tests for Rationale: BAIPropertyFilter is a reusable UI component providing sophisticated filtering interface for Backend.AI applications. It had minimal test coverage (only 5 tests for one utility function) despite being a critical component. According to the research plan, reusable components and helper functions are high-priority targets. Work CompletedTest ImplementationCreated comprehensive test suite with 39 test cases (increased from 5):
Coverage AchievedTarget file:
Quality Assurance
Coverage ImpactPackage-Level Impact (backend.ai-ui):
Project-Level Impact:
Reproducibility# From repository root
cd packages/backend.ai-ui
# Run BAIPropertyFilter tests only
NODE_OPTIONS='--no-deprecation' pnpm test BAIPropertyFilter
# Run with coverage
NODE_OPTIONS='--no-deprecation' pnpm test BAIPropertyFilter --coverage --collectCoverageFrom='src/components/BAIPropertyFilter.tsx'
# Expected output
Test Suites: 1 passed
Tests: 39 passed (10 parseFilterValue, 11 mergeFilterValues, 18 component)
Coverage: 60.82% statements, 47.91% branches, 46.66% functions, 62.92% linesBranch CreatedBranch: Next RecommendationsBased on successful implementation, future iterations should target:
SummarySuccessfully improved test coverage for BAIPropertyFilter component from 20.6% to 60.8% (+40.2 percentage points). The implementation provides comprehensive test coverage for utility functions and basic component rendering, establishing a strong foundation for preventing regressions in this critical filtering component.
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Phase 3 Update: BAIUnmountAfterClose Test Coverage ImprovementGoal SelectedAdded comprehensive unit tests for Rationale: BAIUnmountAfterClose is a critical utility component used throughout the application to manage modal and drawer unmounting behavior while preserving exit animations. It had 0% coverage despite being a key infrastructure component for proper component lifecycle management. Work CompletedTest ImplementationCreated
Coverage AchievedTarget file:
Uncovered: Line 56 (originalAfterClose invocation path) - requires full Ant Design Modal lifecycle simulation Quality Assurance
Coverage ImpactPackage-Level Impact (backend.ai-ui):
Reproducibility# From repository root
cd packages/backend.ai-ui
# Run BAIUnmountAfterClose tests only
NODE_OPTIONS='--no-deprecation' npx jest src/components/BAIUnmountAfterClose.test.tsx
# Run with coverage
NODE_OPTIONS='--no-deprecation' npx jest src/components/BAIUnmountAfterClose.test.tsx --coverage --collectCoverageFrom='src/components/BAIUnmountAfterClose.tsx'
# Run all backend.ai-ui tests
NODE_OPTIONS='--no-deprecation' npx jest --coverage
# Expected results
Test Suites: 5 passed
Tests: 80 passed (18 new)
Coverage: BAIUnmountAfterClose.tsx - 95.83% statements, 80% branches, 100% functionsBranch CreatedBranch: Next RecommendationsBased on successful implementation, future iterations should target:
SummarySuccessfully improved test coverage for BAIUnmountAfterClose component from 0% to 95.83% across all metrics. The implementation provides comprehensive coverage of component lifecycle management, callback preservation, and edge case handling. This establishes a strong foundation for preventing regressions in this critical infrastructure component used throughout the application.
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Phase 3 Progress UpdateGoal: Add comprehensive unit tests for Work Completed:
Coverage Improvement:
Pull Request: Created draft PR with comprehensive test coverage for BAIStatistic component Next Recommended Areas (from research plan):
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Phase 3 Update: BAIButton Test Coverage ImprovementGoal SelectedAdded comprehensive unit tests for Rationale: BAIButton is a wrapper around Ant Design's Button that adds async action handling with React 19's useTransition. It had 0% coverage despite being a reusable component used across the application. Work CompletedTest ImplementationCreated Coverage AchievedTarget file:
Quality Assurance
Coverage Impactbackend.ai-ui Package:
Reproducibilitycd packages/backend.ai-ui
NODE_OPTIONS='--no-deprecation' npx jest src/components/BAIButton.test.tsx --coverageExpected: 100% coverage (statements, branches, functions, lines) Next Recommendations
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Phase 3 Progress UpdateGoal: Add comprehensive unit tests for Work Completed:
Coverage Improvement:
Current Overall Coverage Status (backend.ai-ui): Pull Request: Created draft PR with comprehensive test coverage for BAIBackButton component Next Recommended Areas (from research plan):
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Phase 3 Progress UpdateGoal: Add comprehensive unit tests for Work Completed:
Coverage Improvement:
Current Overall Coverage Status (backend.ai-ui): Pull Request: Created draft PR with comprehensive test coverage for BAITag component Next Recommended Areas (from research plan):
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Phase 3 Update - BAILink Test Coverage CompleteI've successfully added comprehensive test coverage for the BAILink component. Coverage Achievement
Work Completed
Overall ImpactBackend.ai-ui package component coverage increased from 8.28% to 11.37% (+3.09% overall) PR Created: A draft pull request has been created with full details, coverage measurements, and reproducibility instructions. This completes the test coverage improvement for BAILink, a key navigation component used throughout the application. Related Items
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React State Updates in Tests (CRITICAL)Always wrap user interactions that trigger state updates in When testing user interactions (clicks, typing, etc.) that cause React state updates, you MUST wrap them in import { render, screen, act } from '@testing-library/react';
// ✅ Good: Wrapped in act()
it('should call onClick when button is clicked', () => {
const handleClick = jest.fn();
render(<Button onClick={handleClick}>Click Me</Button>);
const button = screen.getByText('Click Me');
act(() => {
button.click();
});
expect(handleClick).toHaveBeenCalled();
});
// ❌ Bad: Not wrapped in act()
it('should call onClick when button is clicked', () => {
const handleClick = jest.fn();
render(<Button onClick={handleClick}>Click Me</Button>);
const button = screen.getByText('Click Me');
button.click(); // Will cause "not wrapped in act(...)" warning
expect(handleClick).toHaveBeenCalled();
});When to use
Why this matters:
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Phase 3 Progress Update Goal: Add comprehensive unit tests for BAICard component Work Completed:
Coverage Impact:
Pull Request: Created draft PR with comprehensive documentation including coverage metrics, test strategy, validation results, and reproducibility instructions. Next Recommended Targets (from previous PR feedback):
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Phase 3 Update: BAIAlert Test Coverage ImprovementGoal SelectedAdded comprehensive unit tests for Rationale: BAIAlert is a simple alert wrapper component (50 lines) making it tractable for thorough testing. It was recommended as the next target in PR #4881 and had 0% coverage despite being used across the application. Work CompletedTest ImplementationCreated
Coverage AchievedTarget file:
Quality Assurance
Coverage ImpactPackage-Level Impact (backend.ai-ui):
Current Overall Coverage Status: Branch CreatedBranch: Note: Due to workflow permissions, a draft PR was not auto-created. A maintainer can push the branch and create the PR manually. Reproducibility# From repository root
cd packages/backend.ai-ui
# Run BAIAlert tests only
NODE_OPTIONS='--no-deprecation' npx jest src/components/BAIAlert.test.tsx
# Run with coverage
NODE_OPTIONS='--no-deprecation' npx jest src/components/BAIAlert.test.tsx --coverage --collectCoverageFrom='src/components/BAIAlert.tsx'
# Expected results
Test Suites: 1 passed
Tests: 33 passed (33 new)
Coverage: BAIAlert.tsx - 100% statements, 100% branches, 100% functions, 100% linesNext Recommended AreasBased on PR #4881 recommendations, future test coverage improvements should focus on:
SummarySuccessfully improved test coverage for BAIAlert component from 0% to 100% across all metrics. The implementation provides comprehensive coverage of alert rendering, styling customization, and props handling.
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Summary of Testing Infrastructure
After analyzing the backend.ai-webui repository, focusing exclusively on the React-based projects in
/reactand/packages/backend.ai-uidirectories, I've identified the current state of testing and formulated a comprehensive plan for systematic test coverage improvement.Current Test Coverage State
Test Distribution (React Projects Only)
/react/src/packages/backend.ai-ui/srcSource Code Volume (React Projects Only)
Testing Technologies in Use
Unit Testing
@testing-library/reactv16.3.0/react/jest.config.js- React-specific Jest config with babel-jest/packages/backend.ai-ui/package.json- UI package config (ESM-based with ts-jest)setupTests.tswith@testing-library/jest-domKey Testing Dependencies
E2E Testing (Out of Scope)
/e2eExisting CI/CD Infrastructure
The repository has a robust CI workflow (
.github/workflows/jest.yml) that:ArtiomTr/jest-coverage-report-action@v2for PR commentsTest Coverage Improvement Plan
Phase 1: Establish Baseline Coverage
Commands to Build and Test
Generate Combined Coverage Report
Phase 2: Prioritized Testing Areas
Based on the hybrid architecture and existing test coverage, I recommend focusing on:
High Priority Areas
1. React Helper Functions (
/react/src/helper)2. Backend.AI UI Helper Functions (
/packages/backend.ai-ui/src/helper)3. Custom Hooks (
/react/src/hooks,/packages/backend.ai-ui/src/hooks)4. React Components with Business Logic (
/react/src/components)Medium Priority Areas
5. Backend.AI UI Components (
/packages/backend.ai-ui/src/components)6. GraphQL Integration
Phase 3: Testing Strategy
Unit Testing Approach
Coverage Goals by Category
Test Organization
Component.tsx→Component.test.tsxshould calculate resource limits when memory is allocateddescribe()blocksPhase 4: Opportunities for Greatly Increasing Coverage
1. Automated Test Generation for Utilities
/helperdirectories first2. Hook Testing with
@testing-library/react-hooks3. Component Testing Strategy
4. Coverage Thresholds
5. Integration Testing Patterns
Phase 5: Test Infrastructure Improvements
Recommended Additions
nycto combine coverage from both projects--maxWorkersfor faster CICI/CD Enhancements
How to Control this Workflow
Workflow Management Commands
You can control this workflow using the following commands:
Feedback and Adjustments
What Happens Next
Phase 2: Coverage Steps Configuration
The next time this workflow runs, I will:
.github/actions/daily-test-improver/coverage-steps/action.ymlPhase 3: Systematic Test Implementation
After Phase 2 configuration is merged, subsequent runs will:
Repeat Mode Behavior
Focus Areas: This plan focuses exclusively on React-based projects in
/reactand/packages/backend.ai-uidirectories, as specified in the updated workflow guidelines.Note: This is an AI-driven workflow. Human review and approval of the research plan and configuration is recommended before proceeding to Phase 3 test implementation.
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