bee-dev-frontend-visual-vuejs

name	bee:dev-frontend-visual-vuejs
title	Vue.js frontend development cycle visual/snapshot testing (Gate 4)
category	development-cycle-frontend-vuejs
tier	1
when_to_use	Use after unit testing (Gate 3) is complete in the Vue.js frontend dev cycle. MANDATORY for all Vue.js frontend development tasks - ensures visual consistency.
description	Gate 4 of the Vue.js frontend development cycle - ensures all components have snapshot tests covering all states, viewports, and edge cases using Vitest snapshots.
trigger	- After unit testing complete (Gate 3) - MANDATORY for all Vue.js frontend development tasks - Catches visual regressions before review
skip_when	- "Snapshots are brittle" - Brittle snapshots catch unintended changes. - "We test visually in the browser" - Manual testing doesn't catch regressions. - "Only default state matters" - Users see error, loading, and empty states too.
sequence	{"after":["bee:dev-unit-testing"],"before":["bee:dev-frontend-e2e-vuejs"]}
related	{"complementary":["bee:dev-cycle-frontend-vuejs","bee:dev-unit-testing","bee:qa-analyst-frontend-vuejs"]}
input_schema	{"required":[{"name":"unit_id","type":"string","description":"Task or subtask identifier"},{"name":"implementation_files","type":"array","items":"string","description":"Files from Gate 0 implementation (.vue files)"}],"optional":[{"name":"ux_criteria_path","type":"string","description":"Path to ux-criteria.md from product-designer"},{"name":"gate3_handoff","type":"object","description":"Full handoff from Gate 3 (unit testing)"}]}
output_schema	{"format":"markdown","required_sections":[{"name":"Visual Testing Summary","pattern":"^## Visual Testing Summary","required":true},{"name":"Snapshot Coverage","pattern":"^## Snapshot Coverage","required":true},{"name":"Component Duplication Check","pattern":"^## Component Duplication Check","required":true},{"name":"Handoff to Next Gate","pattern":"^## Handoff to Next Gate","required":true}],"metrics":[{"name":"result","type":"enum","values":["PASS","FAIL"]},{"name":"components_with_snapshots","type":"integer"},{"name":"total_snapshots","type":"integer"},{"name":"snapshot_failures","type":"integer"},{"name":"iterations","type":"integer"}]}
verification	{"automated":[{"command":"grep -rn 'toMatchSnapshot\\|toMatchInlineSnapshot' --include='*.test.ts' --include='*.snapshot.test.ts' .","description":"Snapshot tests exist","success_pattern":"toMatchSnapshot"},{"command":"find . -name '*.snap' -type f | head -5","description":"Snapshot files generated","success_pattern":".snap"}],"manual":["All component states have snapshots","Responsive viewports covered (375px, 768px, 1280px)","No sindarian-vue component duplication in components/ui/"]}
examples	[{"name":"Snapshot tests for transaction list","input":{"unit_id":"task-001","implementation_files":["src/components/TransactionList.vue"]},"expected_output":"## Visual Testing Summary\n**Status:** PASS\n**Components with Snapshots:** 1\n**Total Snapshots:** 8\n**Snapshot Failures:** 0\n\n## Snapshot Coverage\n| Component | States | Viewports | Edge Cases | Status |\n|-----------|--------|-----------|------------|--------|\n| TransactionList | 4/4 | 3/3 | Long text | PASS |\n\n## Component Duplication Check\n| Component in components/ui/ | In sindarian-vue? | Status |\n|-----------------------------|------------------|--------|\n| _No duplications found_ | - | PASS |\n\n## Handoff to Next Gate\n- Ready for Gate 5 (E2E Testing): YES\n"}]

Dev Frontend Visual Testing - Vue.js (Gate 4)

Overview

Ensure all Vue.js frontend components have snapshot tests covering all states, responsive viewports, and edge cases. Detect visual regressions before code review.

Core principle: If a user can see it, it must have a snapshot. All states, all viewports.

<block_condition>

• Missing state snapshots = FAIL
• Snapshot test failures = FAIL
• sindarian-vue component duplicated in components/ui/ = FAIL </block_condition>

CRITICAL: Role Clarification

This skill ORCHESTRATES. Vue.js Frontend QA Analyst Agent (visual mode) EXECUTES.

Who	Responsibility
This Skill	Gather requirements, dispatch agent, track iterations
QA Analyst Frontend Vue.js Agent	Write snapshot tests, verify states, check duplication

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Standards Reference

MANDATORY: Load testing-visual.md standards via WebFetch.

<fetch_required> https://raw.githubusercontent.com/luanrodrigues/ia-frmwrk/master/dev-team/docs/standards/frontend-vuejs/testing-visual.md </fetch_required>

---

Step 1: Validate Input

REQUIRED INPUT:
- unit_id: [task/subtask being tested]
- implementation_files: [.vue files from Gate 0]

OPTIONAL INPUT:
- ux_criteria_path: [path to ux-criteria.md]
- gate3_handoff: [full Gate 3 output]

if any REQUIRED input is missing:
  → STOP and report: "Missing required input: [field]"

Step 2: Dispatch Vue.js Frontend QA Analyst Agent (Visual Mode)

⛔ Agent Name Resolution: MUST resolve bee: names to runtime-qualified names before dispatch. See shared-patterns/shared-orchestrator-principle.md → "Agent Runtime Resolution".

Task tool:
  subagent_type: "bee:qa-analyst-frontend-vuejs"
  model: "opus"
  prompt: |
    **MODE:** VISUAL TESTING (Gate 4)

    **Standards:** Load testing-visual.md (frontend-vuejs)

    **Input:**
    - Unit ID: {unit_id}
    - Implementation Files: {implementation_files}
    - UX Criteria: {ux_criteria_path or "N/A"}
    - Framework: Vue 3 / Nuxt 3
    - Testing Tool: Vitest + @vue/test-utils + @testing-library/vue

    **Requirements:**
    1. Create snapshot tests for all Vue SFC components using Vitest
    2. Cover all states (Default, Empty, Loading, Error, Success, Disabled)
    3. Add responsive snapshots (375px, 768px, 1280px) for layout components
    4. Test edge cases (long text, 0 items, special characters)
    5. Verify no sindarian-vue component duplication in components/ui/
    6. Use mount() from @vue/test-utils with appropriate stubs for child components

    **Vue-Specific Snapshot Requirements:**
    - Test all prop combinations that produce visually distinct outputs
    - Snapshot v-if / v-show conditional rendering branches explicitly
    - Snapshot slot content variations (default slot, named slots)
    - Snapshot scoped styles output (ensure CSS classes are applied)
    - Verify Transition/TransitionGroup component enter/leave class states
    - Pinia store-dependent components: test with different store states via createTestingPinia()
    - Async components: await flushPromises() before taking snapshot

    **Output Sections Required:**
    - ## Visual Testing Summary
    - ## Snapshot Coverage
    - ## Component Duplication Check
    - ## Handoff to Next Gate

Step 3: Evaluate Results

Parse agent output:

if "Status: PASS" in output:
  → Gate 4 PASSED
  → Return success with metrics

if "Status: FAIL" in output:
  → If missing snapshots: re-dispatch agent to add missing
  → If duplication found: re-dispatch implementation agent to fix
  → Re-run visual tests (max 3 iterations)
  → If still failing: ESCALATE to user

Step 4: Generate Output

## Visual Testing Summary
**Status:** {PASS|FAIL}
**Components with Snapshots:** {count}
**Total Snapshots:** {count}
**Snapshot Failures:** {count}

## Snapshot Coverage
| Component | States | Viewports | Edge Cases | Status |
|-----------|--------|-----------|------------|--------|
| {component} | {X/Y} | {X/Y or N/A} | {description} | {PASS|FAIL} |

## Component Duplication Check
| Component in components/ui/ | In sindarian-vue? | Status |
|-----------------------------|------------------|--------|
| {component} | {Yes|No} | {PASS|FAIL} |

## Handoff to Next Gate
- Ready for Gate 5 (E2E Testing): {YES|NO}
- Iterations: {count}

---

Anti-Rationalization Table

See shared-patterns/shared-anti-rationalization.md for universal anti-rationalizations. Gate-specific:

Rationalization	Why It's WRONG	Required Action
"Snapshots are brittle"	Brittle = catches unintended changes. That's the point.	Write snapshot tests
"We test visually in browser"	Manual testing misses regressions. Automated is repeatable.	Add snapshot tests
"Only default state matters"	Error and loading states are user-facing.	Test all states
"Mobile is just smaller"	Layout changes at breakpoints. Test all viewports.	Add responsive snapshots
"This shadcn-vue component is better"	sindarian-vue is PRIMARY. Don't duplicate.	Check sindarian-vue first
"v-if branches are covered by unit tests"	Unit tests verify logic. Snapshots verify rendered output.	Snapshot each v-if branch
"Slot content varies too much to snapshot"	Use representative slot content and snapshot it.	Snapshot default and key slot variations
"Pinia state is mocked, snapshot is wrong"	Use createTestingPinia() with initial state that represents real usage.	Snapshot with realistic store state

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