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Accessibility Audit Service

Component Detail

Service Layer high complexity mobile
2
Dependencies
1
Dependents
0
Entities
0
Integrations

Description

Provides automated accessibility validation logic used both in CI and at runtime. Validates contrast ratios against WCAG 4.5:1 (text) and 3:1 (UI component) thresholds using design token values, verifies touch target sizes, and runs Flutter semantics tree assertions. Integrates with the CI pipeline to block builds that introduce accessibility regressions.

Feature: WCAG 2.2 AA Compliance

accessibility-audit-service

Responsibilities

  • Validate color contrast ratios for all design token color pairs against WCAG thresholds
  • Assert that all interactive Semantics nodes have non-empty labels in widget tests
  • Check minimum touch target sizes in widget test suite via finder constraints
  • Generate accessibility audit reports per screen for manual review milestones
  • Expose utility methods for use in flutter_test semantics assertions

Interfaces

validateContrastRatio(Color foreground, Color background) -> ContrastResult
assertSemanticsLabels(WidgetTester tester) -> List<SemanticsViolation>
assertTouchTargetSizes(WidgetTester tester) -> List<TouchTargetViolation>
generateAuditReport(String screenName) -> AccessibilityAuditReport
runFullScreenAudit(WidgetTester tester, String screenName) -> AuditSummary

Relationships

Dependencies (2)

Components this component depends on

infrastructure Accessibility CI Infrastructure data Design Token Repository Shared

Dependents (1)

Components that depend on this component

infrastructure Accessibility CI Infrastructure