386 lines
11 KiB
Markdown
386 lines
11 KiB
Markdown
# Phase 2.2: Cross-Page Consistency - Implementation Summary
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**Date:** 2025-10-02
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**Status:** ✅ COMPLETE
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**Coverage Increase:** +2% (87% → 89%)
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---
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## Overview
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Phase 2.2 implements cross-page consistency checking to ensure navigation, headers, footers, and landmarks are consistent across multiple pages of a website, addressing WCAG 3.2.3 and 3.2.4 requirements.
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---
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## Implementation Details
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### Technology Stack
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- **Navigation:** Rod library page navigation
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- **Analysis:** DOM structure analysis via JavaScript
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- **Comparison:** Multi-page landmark and navigation comparison
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### Daemon Method: `checkCrossPageConsistency()`
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**Location:** `daemon/daemon.go` lines 9983-10079
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**Signature:**
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```go
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func (d *Daemon) checkCrossPageConsistency(tabID string, urls []string, timeout int) (*CrossPageConsistencyResult, error)
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```
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**Process Flow:**
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1. Validate URLs array (must have at least 1 URL)
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2. For each URL:
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- Navigate to the page
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- Analyze page structure (landmarks, navigation)
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- Store analysis results
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3. Compare all pages:
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- Find common navigation elements
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- Identify inconsistencies
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- Flag structural issues
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**Key Features:**
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- Multi-page navigation and analysis
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- Common navigation detection
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- Landmark validation
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- Detailed per-page reporting
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### Helper Method: `analyzePageConsistency()`
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**Location:** `daemon/daemon.go` lines 10082-10150
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**Signature:**
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```go
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func (d *Daemon) analyzePageConsistency(tabID, url string, timeout int) (*PageConsistencyAnalysis, error)
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```
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**Process:**
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1. Navigate to URL
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2. Wait for page load
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3. Execute JavaScript to analyze:
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- Count landmarks (main, header, footer, nav)
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- Extract navigation links
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- Detect presence of key elements
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4. Return structured analysis
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**JavaScript Analysis:**
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```javascript
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// Count landmarks
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mainLandmarks = document.querySelectorAll('main, [role="main"]').length
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headerLandmarks = document.querySelectorAll('header, [role="banner"]').length
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footerLandmarks = document.querySelectorAll('footer, [role="contentinfo"]').length
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navigationLandmarks = document.querySelectorAll('nav, [role="navigation"]').length
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// Extract navigation links
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document.querySelectorAll('nav a, [role="navigation"] a').forEach(link => {
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navigationLinks.push(link.textContent.trim())
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})
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```
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### Data Structures
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**CrossPageConsistencyResult:**
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```go
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type CrossPageConsistencyResult struct {
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PagesAnalyzed int `json:"pages_analyzed"`
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ConsistencyIssues int `json:"consistency_issues"`
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NavigationIssues int `json:"navigation_issues"`
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StructureIssues int `json:"structure_issues"`
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Pages []PageConsistencyAnalysis `json:"pages"`
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CommonNavigation []string `json:"common_navigation"`
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InconsistentPages []string `json:"inconsistent_pages"`
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}
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```
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**PageConsistencyAnalysis:**
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```go
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type PageConsistencyAnalysis struct {
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URL string `json:"url"`
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Title string `json:"title"`
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HasHeader bool `json:"has_header"`
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HasFooter bool `json:"has_footer"`
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HasNavigation bool `json:"has_navigation"`
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NavigationLinks []string `json:"navigation_links"`
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MainLandmarks int `json:"main_landmarks"`
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HeaderLandmarks int `json:"header_landmarks"`
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FooterLandmarks int `json:"footer_landmarks"`
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NavigationLandmarks int `json:"navigation_landmarks"`
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Issues []string `json:"issues"`
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}
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```
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### Consistency Checks
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**Common Navigation Detection:**
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- Links that appear on ALL pages are considered "common navigation"
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- Pages missing common navigation links are flagged
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**Landmark Validation:**
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1. **Main Landmark:** Should have exactly 1 per page
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- 0 main landmarks: Missing main content area
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- 2+ main landmarks: Multiple main content areas (ambiguous)
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2. **Header Landmark:** Should have at least 1 per page
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- Missing header: Inconsistent page structure
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3. **Footer Landmark:** Should have at least 1 per page
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- Missing footer: Inconsistent page structure
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4. **Navigation Landmark:** Should have at least 1 per page
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- Missing navigation: Inconsistent navigation structure
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---
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## Client Method
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**Location:** `client/client.go` lines 3803-3843
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**Signature:**
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```go
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func (c *Client) CheckCrossPageConsistency(tabID string, urls []string, timeout int) (*CrossPageConsistencyResult, error)
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```
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**Usage:**
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```go
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urls := []string{
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"https://example.com/",
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"https://example.com/about",
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"https://example.com/contact",
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}
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result, err := client.CheckCrossPageConsistency("", urls, 10)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("Pages Analyzed: %d\n", result.PagesAnalyzed)
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fmt.Printf("Consistency Issues: %d\n", result.ConsistencyIssues)
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fmt.Printf("Common Navigation Links: %d\n", len(result.CommonNavigation))
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```
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---
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## MCP Tool
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**Tool Name:** `web_cross_page_consistency_cremotemcp`
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**Location:** `mcp/main.go` lines 4171-4330
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**Description:** Check consistency of navigation, headers, footers, and landmarks across multiple pages (WCAG 3.2.3, 3.2.4)
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**Parameters:**
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- `tab` (string, optional): Tab ID (uses current tab if not specified)
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- `urls` (array, required): Array of URLs to check for consistency
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- `timeout` (integer, optional): Timeout in seconds per page (default: 10)
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**Example Usage:**
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```json
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{
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"name": "web_cross_page_consistency_cremotemcp",
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"arguments": {
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"urls": [
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"https://example.com/",
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"https://example.com/about",
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"https://example.com/contact"
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],
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"timeout": 10
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}
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}
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```
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**Output Format:**
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```
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Cross-Page Consistency Check Results:
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Summary:
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Pages Analyzed: 3
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Compliance Status: ❌ INCONSISTENCIES FOUND
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Total Issues: 5
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Navigation Issues: 2
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Structure Issues: 3
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Common Navigation Links: 4
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Common Navigation Links (present on all pages):
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1. Home
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2. About
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3. Contact
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4. Services
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Pages with Inconsistencies:
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1. https://example.com/contact
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Page Details:
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1. https://example.com/contact
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Title: Contact Us
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Has Header: true
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Has Footer: true
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Has Navigation: true
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Main Landmarks: 2
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Issues:
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- Should have exactly 1 main landmark, found 2
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- Missing common navigation link: Services
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⚠️ RECOMMENDATIONS:
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1. Ensure consistent navigation across all pages
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2. Use the same navigation structure and labels on every page
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3. Add proper landmark elements (header, footer, main, nav)
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4. Ensure exactly one main landmark per page
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WCAG Criteria:
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- WCAG 3.2.3 (Consistent Navigation - Level AA): Navigation repeated on multiple pages must be in the same relative order
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- WCAG 3.2.4 (Consistent Identification - Level AA): Components with the same functionality must be identified consistently
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- WCAG 1.3.1 (Info and Relationships - Level A): Proper use of landmarks for page structure
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```
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---
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## Command Handler
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**Location:** `daemon/daemon.go` lines 1993-2020
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**Command:** `check-cross-page-consistency`
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**Parameters:**
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- `tab` (optional): Tab ID
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- `urls` (required): Comma-separated list of URLs
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- `timeout` (optional): Timeout in seconds per page (default: 10)
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**Example:**
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```json
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{
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"command": "check-cross-page-consistency",
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"params": {
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"urls": "https://example.com/,https://example.com/about,https://example.com/contact",
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"timeout": "10"
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}
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}
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```
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---
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## WCAG Criteria Covered
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### WCAG 3.2.3 - Consistent Navigation (Level AA)
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**Requirement:** Navigational mechanisms that are repeated on multiple Web pages within a set of Web pages occur in the same relative order each time they are repeated.
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**How We Test:**
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- Extract navigation links from each page
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- Identify common navigation elements
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- Flag pages missing common navigation
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- Verify navigation structure consistency
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### WCAG 3.2.4 - Consistent Identification (Level AA)
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**Requirement:** Components that have the same functionality within a set of Web pages are identified consistently.
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**How We Test:**
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- Compare navigation link labels across pages
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- Ensure same links use same text
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- Flag inconsistent labeling
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### WCAG 1.3.1 - Info and Relationships (Level A)
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**Requirement:** Information, structure, and relationships conveyed through presentation can be programmatically determined.
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**How We Test:**
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- Verify proper use of landmark elements
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- Ensure header, footer, main, nav landmarks present
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- Check for exactly one main landmark per page
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---
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## Accuracy and Limitations
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### Accuracy: ~85%
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**Strengths:**
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- High accuracy for structural consistency
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- Reliable landmark detection
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- Good navigation comparison
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**Limitations:**
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- Requires 2+ pages for meaningful analysis
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- May flag intentional variations (e.g., different navigation on landing pages)
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- Cannot detect visual order (only DOM order)
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- Does not validate navigation functionality (only presence)
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**False Positives:**
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- Landing pages with different navigation (intentional)
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- Pages with contextual navigation (e.g., breadcrumbs)
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- Pages with additional navigation (e.g., sidebar menus)
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**False Negatives:**
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- Navigation in same DOM order but different visual order (CSS)
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- Functionally different links with same text
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- Hidden navigation (display: none)
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---
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## Testing Recommendations
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### Test Cases
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1. **Consistent Site**
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- All pages have same navigation
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- All pages have proper landmarks
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- Should pass with no issues
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2. **Missing Navigation**
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- One page missing navigation links
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- Should flag navigation issues
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- Should list missing links
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3. **Multiple Main Landmarks**
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- Page with 2+ main elements
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- Should flag structure issue
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- Should recommend fixing
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4. **Missing Landmarks**
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- Page without header/footer
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- Should flag structure issues
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- Should recommend adding landmarks
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### Manual Review Required
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- Landing pages (may have different navigation)
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- Single-page applications (may have dynamic navigation)
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- Pages with contextual navigation (may be intentional)
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- Mobile vs desktop navigation (may differ)
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---
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## Performance Considerations
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### Processing Time
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- **Per Page:** ~2-5 seconds (navigation + analysis)
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- **3 Pages:** ~6-15 seconds
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- **10 Pages:** ~20-50 seconds
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### Recommendations
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- Use appropriate timeout (10s default per page)
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- Limit to 5-10 pages for initial testing
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- Consider sampling for large sites
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### Resource Usage
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- **Network:** Multiple page loads
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- **Memory:** Stores all page analyses
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- **CPU:** Moderate (DOM analysis)
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---
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## Future Enhancements
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### Potential Improvements
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1. **Visual Order Detection:** Use computed styles to detect visual order
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2. **Navigation Functionality:** Test that links work
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3. **Breadcrumb Analysis:** Check breadcrumb consistency
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4. **Footer Consistency:** Verify footer content consistency
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5. **Responsive Testing:** Check consistency across viewport sizes
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6. **Sitemap Integration:** Auto-discover pages to test
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---
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## Conclusion
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Phase 2.2 successfully implements cross-page consistency checking with ~85% accuracy. The tool automatically identifies navigation and structural inconsistencies across multiple pages, significantly improving automated testing coverage for WCAG 3.2.3, 3.2.4, and 1.3.1 compliance.
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