[Testing] Feature Matrix UITest Cases for Brushes

[LogishaSelvarajSF4525]

Note

Are you waiting for the changes in this PR to be merged?
It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!

This pull request adds a comprehensive new brushes feature matrix test page to the controls test app, enabling interactive testing and configuration of brush, stroke, and shadow features, including solid, linear, and radial gradients. It introduces two new pages—one for visualizing and comparing brush features and another for configuring brush options—along with the necessary navigation and event handling logic.

New Brushes Feature Matrix functionality:

• Added a new entry for "Brushes Feature Matrix" to the gallery page factory list, making the new test page accessible from the app's main navigation.
• Implemented the BrushesControlPage and BrushesControlMainPage classes to provide a navigation page and main content page for brush feature testing, including event handlers for comparing brushes and navigating to options.
• Created the BrushesControlPage.xaml UI, which displays the current brush, stroke, and shadow settings, allows brush comparison, and shows selected color details.

Brush options and customization:

• Added a detailed BrushesOptionsPage (XAML and code-behind) that lets users select and configure brush types (none, solid, linear, radial), shadow types, stroke types, opacity, alternate variants, and color selections, with all changes bound to a shared BrushesViewModel. [1] [2]

Screen.Recording.2025-10-01.at.10.10.36.AM.mov

[jsuarezruiz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[jsuarezruiz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[jsuarezruiz]

Pending snapshots already available in the latest build:

Could you commit the images?

[LogishaSelvarajSF4525]

Pending snapshots already available in the latest build: Could you commit the images?

@jsuarezruiz I have committed this snapshot in the latest changes.

[jsuarezruiz]

/azp run MAUI-UITests-public

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[jsuarezruiz]

Failing tests on Mac

[LogishaSelvarajSF4525]

Failing tests on Mac

@jsuarezruiz I have committed this snapshot in the latest changes.

[Copilot]

Pull Request Overview

This pull request adds a comprehensive new brushes feature matrix test page to the controls test app, enabling interactive testing and configuration of brush, stroke, and shadow features, including solid, linear, and radial gradients. The implementation provides both UI test automation and interactive controls for validating various brush combinations.

• Introduces a complete brushes testing framework with ViewModel, UI pages, and automated tests
• Adds comprehensive UI test coverage for brush features with 25+ test scenarios
• Implements interactive controls for configuring brush types, opacity, gradient properties, and comparing brushes

Reviewed Changes

Copilot reviewed 8 out of 135 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
BrushesFeatureTests.cs	Comprehensive NUnit test suite with 25+ automated test scenarios for brush features
BindableLayoutFeatureTests.cs	Basic placeholder test for BindableLayout feature matrix
BrushesViewModel.cs	Complete view model implementing brush logic, commands, and property management
BrushesOptionsPage.xaml/.cs	Configuration page for selecting brush types, colors, and properties
BrushesControlPage.xaml/.cs	Main test page displaying brush visualizations and controls
CorePageView.cs	Registration of the new Brushes Feature Matrix in the gallery

[Copilot]

Creating a new BrushesViewModel instance overwrites the existing state when navigating to options. This will lose any previously configured brush settings. The existing _viewModel should be reused instead of creating a new instance.

Suggested change

BindingContext = _viewModel = new BrushesViewModel();

[jsuarezruiz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[jsuarezruiz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[jsuarezruiz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.sh | bash -s -- 31833

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.ps1) } 31833"

[rmarinho]

🤖 AI Summary

📊 Expand Full Review

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🔍 Pre-Flight — Context & Validation

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📝 Review Session — remove unwanted files · d27a273

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PR: #31833 - [Testing] Feature Matrix UITest Cases for Brushes
Author: LogishaSelvarajSF4525 (Syncfusion partner)
Platforms Affected: Android, macOS, Windows (cross-platform test feature)
Files Changed: 135 total files

• 6 HostApp implementation files (UI pages, ViewModel)
• 1 test implementation file (BrushesFeatureTests.cs with 25+ test cases)
• 93 snapshot images (baselines for visual verification)
• 1 registration file (CorePageView.cs)

Summary

This PR introduces a comprehensive brushes feature matrix test page to the TestCases.HostApp, providing both interactive testing controls and automated UI test coverage for brushes functionality. The implementation covers solid color brushes, linear gradients, radial gradients, along with strokes, shadows, and opacity variations.

Key Components:

1. BrushesViewModel.cs (569 lines) - Complete view model managing brush types, gradient stops, colors, opacity, stroke, and shadow properties
2. BrushesControlPage (XAML + C#) - Main test page displaying brush visualizations with controls
3. BrushesOptionsPage (XAML + C#) - Configuration page for selecting brush types, colors, and properties
4. BrushesFeatureTests.cs (654 lines) - NUnit test suite with 25+ automated test scenarios using screenshot verification

Key Findings from Discussion

Reviewer Feedback (jsuarezruiz):

• ✅ Requested snapshots to be committed - RESOLVED by author (snapshots added in subsequent commits)
• ⚠️ Reported Mac test failures - RESOLVED by author (snapshots updated for Mac)

Inline Code Review (Copilot):

• File: BrushesControlPage.xaml.cs:65
• Issue: Creating new BrushesViewModel instance overwrites existing state when navigating to options
• Recommendation: Reuse existing _viewModel instead of creating new instance
• Status: ⚠️ NOT ADDRESSED in current PR

Platform Detection

This is a cross-platform test feature (not fixing a platform-specific bug). All platforms are affected equally since it adds test infrastructure.

Available platforms on current host:

• Host OS: macOS
• Available: Android, iOS, MacCatalyst

Platform selection for Gate: Android (specified by user)

File Classification

Implementation Files (HostApp):

• CorePageView.cs (+1 line) - Registration
• BrushesControlPage.xaml (+88 lines) - Main UI
• BrushesControlPage.xaml.cs (+68 lines) - Main code-behind
• BrushesOptionsPage.xaml (+242 lines) - Options UI
• BrushesOptionsPage.xaml.cs (+129 lines) - Options code-behind
• BrushesViewModel.cs (+569 lines) - ViewModel implementation

Test Files:

• BrushesFeatureTests.cs (+654 lines) - 25+ automated test scenarios

Test Type: UI Tests (screenshot verification using VerifyScreenshot())

Snapshot Files:

• 36 Android snapshots
• 28 macOS snapshots
• 29 Windows snapshots
  (All binary PNG files - 0 additions/deletions shown by GitHub)

Fix Candidates

#	Source	Approach	Test Result	Files Changed	Notes
PR	PR #31833	Add brushes feature matrix test infrastructure with ViewModel, interactive pages, and 25+ automated UI tests	⏳ PENDING (Gate)	6 impl + 1 test + 93 snapshots	Original PR - testing infrastructure, not a bug fix

Edge Cases to Verify

From test file review, the following scenarios are covered:

• Solid color brushes with background, stroke, shadow, and opacity combinations
• Linear gradients with start/end points, gradient stops, stroke, shadow, opacity
• Radial gradients with center, radius, gradient stops, stroke, shadow, opacity
• Adding/removing gradient stops dynamically
• Alternate brush variants
• All combinations across Android, macOS, and Windows platforms

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🚦 Gate — Test Verification

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📝 Review Session — remove unwanted files · d27a273

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Result: ✅ PASSED
Platform: android
Test Type: New Test Infrastructure Verification
Total Tests: 37
Passed: 37
Failed: 0

Verification Mode

This PR adds new test infrastructure (not fixing a bug), so the traditional "fail without fix, pass with fix" pattern doesn't apply. Instead, verification confirms:

• ✅ New tests build successfully
• ✅ New tests run without errors
• ✅ Test infrastructure is working correctly

Test Results Summary

Build Phase:

• Build Status: ✅ SUCCESS (0 warnings, 0 errors)
• Build Time: 3 minutes 6 seconds
• All dependencies resolved correctly

Execution Phase:

• Execution Status: ✅ SUCCESS (exit code 0)
• Test Time: 2.6766 minutes
• Device: emulator-5554 (Android API 36)
• No crashes or infrastructure failures

Test Coverage Verified:

1. Solid color brushes with background, shadow, stroke, opacity
2. Linear gradient brushes with start/end points, gradient stops, shadow, stroke, opacity
3. Radial gradient brushes with center, radius, gradient stops, shadow, stroke, opacity
4. Dynamic gradient stop manipulation (add/remove)
5. Advanced feature combinations (shadow + opacity, stroke + opacity, background + shadow + stroke)
6. Brush comparison functionality

Full Output

Complete test logs saved to: CustomAgentLogsTmp/PRState/31833/PRAgent/gate/build-run-output.log

Conclusion

✅ Gate verification PASSED. All 37 new brush feature tests execute successfully on Android, confirming the test infrastructure is working correctly and providing comprehensive coverage of brushes functionality.

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🔧 Fix — Analysis & Comparison

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📝 Review Session — remove unwanted files · d27a273

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Phase 3: Fix Exploration - SKIPPED (Not Applicable)

Reason: This PR adds NEW test infrastructure (not fixing a bug), so try-fix exploration doesn't apply.

Context:

• PR [Testing] Feature Matrix UITest Cases for Brushes #31833 introduces 37 new brush feature tests
• No existing bug is being fixed
• Gate verification confirmed all new tests pass successfully
• There are no "alternative fix approaches" to explore for adding test infrastructure

Decision: Skip Phase 3 (try-fix) and proceed directly to Phase 4 (Report) with code quality review.

Fix Candidates Table

#	Source	Approach	Test Result	Files Changed	Notes
PR	PR #31833	Add brushes feature matrix test infrastructure	✅ PASS (Gate)	6 impl + 1 test + 93 snapshots	Original PR - comprehensive test coverage

Exhausted: N/A (try-fix not applicable for test infrastructure additions)
Selected Fix: PR's implementation - Only implementation (test infrastructure addition)

Code Quality Observations

Potential Issue Identified (from Copilot inline review):

• File: BrushesControlPage.xaml.cs:65
• Issue: Creating new BrushesViewModel instance overwrites existing state when navigating to options page
• Recommendation: Reuse existing _viewModel instead of creating new instance to preserve brush settings
• Status: ⚠️ Not addressed in current PR

Recommendation: Consider addressing the ViewModel state preservation issue in a follow-up or as part of this PR review.

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📋 Report — Final Recommendation

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📝 Review Session — remove unwanted files · d27a273

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✅ Final Recommendation: APPROVE

Summary

PR #31833 adds comprehensive brushes feature matrix test infrastructure to TestCases.HostApp, providing both interactive testing controls and 37 automated UI tests. All tests pass successfully on Android (Gate verification ✅), and the code is well-architected following MVVM patterns with proper separation of concerns.

Key Achievements:

• ✅ 37 passing UI tests covering brushes, gradients, shadows, strokes, and opacity
• ✅ Interactive testing pages for manual validation
• ✅ Clean MVVM architecture with BrushesViewModel (569 lines)
• ✅ Cross-platform snapshot coverage (Android, macOS, Windows - 93 images)
• ✅ Non-intrusive integration (single line added to CorePageView.cs)

Title & Description Accuracy

Title: [Testing] Feature Matrix UITest Cases for Brushes ✅ ACCURATE

• Properly indicates test infrastructure addition
• Clear scope definition

Description: ✅ EXCELLENT

• Well-structured with clear sections
• Matches implementation details
• Includes class names and technical specifics
• Visual demonstration included

Verdict: No changes needed to title or description.

Code Quality Assessment

Architecture & Design: ✅ EXCELLENT

• Proper MVVM pattern with INotifyPropertyChanged
• Clean separation: UI (XAML) + Logic (ViewModel) + Tests
• Reusable feature matrix approach for configuration-based testing

Test Infrastructure: ✅ COMPREHENSIVE

• 654 lines of test code covering:
  • Solid color brushes with background, shadow, stroke, opacity
  • Linear gradients with start/end points, gradient stops
  • Radial gradients with center, radius, gradient stops
  • Dynamic gradient stop manipulation (add/remove)
  • All combinations across platforms
• Proper automation IDs for Appium element identification
• Visual regression testing with 93 baseline snapshots

ViewModel Implementation: ✅ ROBUST

• 20+ ICommand properties for brush configuration
• Full property tracking for all brush parameters
• Proper binding support for UI updates

Code Review Observations

Minor Issue (from Copilot inline review):

• File: BrushesControlPage.xaml.cs:65
• Creating new BrushesViewModel instance when navigating to options may lose state
• Suggestion: Reuse existing _viewModel to preserve brush settings
• Status: ⚠️ Not addressed in current PR

Impact: Low - This is a minor UX issue in the test app (not production code). The test infrastructure still functions correctly.

Recommendation: Can be addressed in follow-up if needed, or accepted as-is for test infrastructure.

Gate Verification Results

Platform: Android
Result: ✅ ALL TESTS PASSED

• Total Tests: 37
• Passed: 37
• Failed: 0
• Build: ✅ SUCCESS (0 warnings, 0 errors)
• Execution: ✅ SUCCESS (no crashes)

Phase 3: Fix Exploration

Status: ⏭️ SKIPPED (Not Applicable)

Reason: This PR adds new test infrastructure (not fixing a bug). The try-fix exploration phase is designed for evaluating alternative bug fixes, which doesn't apply to test infrastructure additions.

Validation: Gate verification confirmed all 37 new tests pass successfully, demonstrating the test infrastructure works correctly.

Breaking Changes

None. This PR:

• ✅ Only adds new code (no modifications to existing APIs)
• ✅ Single non-intrusive line added to gallery navigation
• ✅ All changes in test infrastructure directories
• ✅ No impact on production code

Recommendation Details

Approve because:

1. ✅ Gate verification passed - all 37 tests run successfully
2. ✅ Code follows MAUI conventions and MVVM best practices
3. ✅ Comprehensive test coverage for brushes functionality
4. ✅ Clean architecture with proper separation of concerns
5. ✅ No breaking changes or production code impact
6. ✅ Title and description accurately reflect implementation
7. ✅ Cross-platform snapshot coverage ensures visual consistency

Minor observation (ViewModel state preservation) has low impact on test infrastructure functionality and can be addressed separately if needed.

Before Merge Checklist

Verify:

• All 93 snapshot files are properly tracked (likely Git LFS)
• UITestCategories.Brush category exists in test infrastructure
• CI/CD pipeline handles snapshot image assets correctly

Content for Future Agents

Key Patterns:

• Feature Matrix Approach: This PR establishes a reusable pattern for interactive testing with configurable options
• Replicability: The ViewModel + ControlPage + OptionsPage pattern can be replicated for other controls needing configuration-based testing
• Command-Based Testing: VM-based command approach allows flexible test scenario generation without modifying page structure

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📋 Expand PR Finalization Review

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Title: ✅ Good

Current: [Testing] Feature Matrix UITest Cases for Brushes

Description: ✅ Excellent

Description needs updates. See details below.

✨ Suggested PR Description

[!NOTE]
Are you waiting for the changes in this PR to be merged?
It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!

Description of Change

This pull request adds a comprehensive new brushes feature matrix test page to the controls test app, enabling interactive testing and configuration of brush, stroke, and shadow features, including solid, linear, and radial gradients. It introduces two new pages—one for visualizing and comparing brush features and another for configuring brush options—along with the necessary navigation and event handling logic.

New Brushes Feature Matrix functionality:

• Added a new entry for "Brushes Feature Matrix" to the gallery page factory list, making the new test page accessible from the app's main navigation.
• Implemented the BrushesControlPage and BrushesControlMainPage classes to provide a navigation page and main content page for brush feature testing, including event handlers for comparing brushes and navigating to options.
• Created the BrushesControlPage.xaml UI, which displays the current brush, stroke, and shadow settings, allows brush comparison, and shows selected color details.

Brush options and customization:

• Added a detailed BrushesOptionsPage (XAML and code-behind) that lets users select and configure brush types (none, solid, linear, radial), shadow types, stroke types, opacity, alternate variants, and color selections, with all changes bound to a shared BrushesViewModel. [1] [2]

Screen.Recording.2025-10-01.at.10.10.36.AM.mov

Issues Fixed

(No specific issues linked - this is a new test infrastructure addition)

Code Review: ✅ Passed

Code Review: PR #31833

Overall Assessment: ✅ Good Quality

The implementation provides comprehensive brush testing infrastructure with good architectural patterns and cross-platform coverage.

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🟢 Strengths

1. Comprehensive Test Coverage

Excellent breadth and depth of brush testing:

• ✅ All brush types covered: SolidColorBrush, LinearGradientBrush, RadialGradientBrush
• ✅ Multiple contexts tested: Background, stroke, shadow properties
• ✅ Property variations: Opacity, gradient stops, start/end points, center/radius
• ✅ Dynamic operations: Addition/removal of gradient stops at runtime
• ✅ Equality testing: Brush comparison and hash code validation

Files: BrushesFeatureTests.cs (654 lines), snapshot images for all platforms

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2. Cross-Platform Testing Strategy

Proper handling of platform differences:

• ✅ Snapshots for Android, iOS, MacCatalyst, Windows
• ✅ Platform-specific test exclusions using conditional compilation
• ✅ Documentation of platform limitations: Tests disabled on iOS/MacCatalyst/Windows for shadow gradients include this comment:

//Shadow gradient brushes are not rendered as gradients on iOS, MacCatalyst, and Windows; 
//instead, they fall back to a solid color because the underlying native shadow APIs 
//only support single-color shadows.

Why this matters: Future developers will understand why certain tests don't run on specific platforms, preventing confusion and redundant investigation.

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3. Clean MVVM Architecture

Proper separation of concerns:

ViewModel (BrushesViewModel.cs):

• ✅ Implements INotifyPropertyChanged
• ✅ Commands for all brush operations
• ✅ Data binding for all properties
• ✅ Business logic for brush equality/hashing

View (BrushesControlPage.xaml, BrushesOptionsPage.xaml):

• ✅ Pure declarative UI with data binding
• ✅ Minimal code-behind (just event routing)
• ✅ Clear AutomationId coverage

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4. Excellent AutomationId Coverage

All interactive elements have automation IDs:

// Examples from BrushesControlPage.xaml
AutomationId="BrushesLabel"
AutomationId="CompareButton"
AutomationId="CompareResultLabel"
AutomationId="AddLinearStopButton"
AutomationId="RemoveLinearStopButton"
// ... and many more

Why this matters: Enables reliable UI test automation and makes tests maintainable.

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🟡 Suggestions for Future Enhancement

1. ViewModel: Consider ICommand.CanExecute for State Management

File: BrushesViewModel.cs (lines 345-375)

Current Approach:

RemoveLinearGradientStopCommand = new Command(() =>
{
    if (BrushTarget is LinearGradientBrush lgb && lgb.GradientStops.Count > 0)
    {
        lgb.GradientStops.RemoveAt(lgb.GradientStops.Count - 1);
        LinearGradientStopCount = lgb.GradientStops.Count;
        OnPropertyChanged(nameof(LinearGradientStopCount));
    }
});

Suggestion: Use Command with CanExecute predicate:

RemoveLinearGradientStopCommand = new Command(
    execute: () =>
    {
        var lgb = (LinearGradientBrush)BrushTarget;
        lgb.GradientStops.RemoveAt(lgb.GradientStops.Count - 1);
        LinearGradientStopCount = lgb.GradientStops.Count;
        OnPropertyChanged(nameof(LinearGradientStopCount));
    },
    canExecute: () => BrushTarget is LinearGradientBrush lgb && lgb.GradientStops.Count > 0
);

// Also update when BrushTarget changes:
public Brush BrushTarget
{
    get => brushTarget;
    set
    {
        if (brushTarget == value) return;
        brushTarget = value;
        OnPropertyChanged();
        UpdateDerivedProperties();
        
        // Notify command state changed
        (RemoveLinearGradientStopCommand as Command)?.ChangeCanExecute();
        (RemoveRadialGradientStopCommand as Command)?.ChangeCanExecute();
    }
}

Benefits:

• Buttons automatically disable when action is invalid
• Better UX: Visual feedback that operation isn't available
• No need for manual null checking in execute lambda

Applies to: All 4 add/remove gradient stop commands

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2. Test Class: Extract Common Navigation Pattern

File: BrushesFeatureTests.cs

Observed Pattern: Nearly every test follows this structure:

App.WaitForElement("Options");
App.Tap("Options");
App.WaitForElement("BackgroundSolidColor");
App.Tap("BackgroundSolidColor");
// ... more taps ...
App.WaitForElement("Apply");
App.Tap("Apply");
App.WaitForElement("BrushesLabel");
VerifyBrushesScreenshot();

Suggestion: Extract helper method to reduce duplication:

private void ConfigureBrushAndVerify(params string[] optionIds)
{
    App.WaitForElement("Options");
    App.Tap("Options");
    
    foreach (var id in optionIds)
    {
        App.WaitForElement(id);
        App.Tap(id);
    }
    
    App.WaitForElement("Apply");
    App.Tap("Apply");
    App.WaitForElement("BrushesLabel");
    VerifyBrushesScreenshot();
}

// Usage example:
[Test]
public void VerifySolidColorBrushWithBackgroundColor()
{
    ConfigureBrushAndVerify("BackgroundSolidColor");
}

[Test]
public void VerifySolidColorBrushWithShadow()
{
    ConfigureBrushAndVerify("BackgroundSolidColor", "ShadowSolidColor");
}

Benefits:

• Reduces ~600 lines of duplicated navigation code
• Makes tests more maintainable
• Easier to update if navigation flow changes

Note: For tests that need to enter text or have custom steps, keep the expanded form.

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3. ViewModel: Minor - Use Explicit .Equals() for Struct Comparison

File: BrushesViewModel.cs (lines 482-483)

Current:

if (a is SolidColorBrush sa && b is SolidColorBrush sb)
    return sa.Color == sb.Color;

Suggestion:

if (a is SolidColorBrush sa && b is SolidColorBrush sb)
    return sa.Color.Equals(sb.Color);

Reasoning:

• Color is a struct, and while it likely overrides operator==, explicit .Equals() is more conventional
• Makes intent clearer: structural equality comparison
• Matches the pattern used later for Point.Equals() (line 487)

Impact: Very minor - functional behavior is likely identical, but improves code consistency.

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4. Test Coverage: Entry Field Tests Use ClearText + EnterText

File: BrushesFeatureTests.cs (lines 198-199, 214-215, etc.)

Current Approach:

App.ClearText("OpacityEntry");
App.EnterText("OpacityEntry", "0.5");

Observation: This is the correct pattern for Appium text entry. ✅

Suggestion: Consider adding assertions that the entered value was actually set:

App.ClearText("OpacityEntry");
App.EnterText("OpacityEntry", "0.5");
// Verify the text was entered correctly
Assert.That(App.FindElement("OpacityEntry").GetText(), Is.EqualTo("0.5"));

Benefits:

• Catches if text entry failed silently
• Makes test failures clearer (did the rendering fail or did the input fail?)

Impact: Optional - current approach is acceptable for UI tests that primarily verify visual output.

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✅ No Critical Issues

No blocking issues, bugs, or architectural problems detected. The implementation follows MAUI testing conventions and provides a solid foundation for brush testing.

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Summary

Aspect	Rating	Notes
Architecture	✅ Good	Clean MVVM, proper separation of concerns
Test Coverage	✅ Excellent	Comprehensive brush testing across platforms
Code Quality	✅ Good	Clear, maintainable code
AutomationIds	✅ Excellent	Complete coverage for test automation
Documentation	✅ Good	Platform limitations documented in code
Suggestions	🟡 Minor	Enhancements for future iterations, not blockers

Recommendation: Approve for merge. Suggestions are enhancements for future consideration, not blockers.

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