Managing Detox

Detox React Native Testing Management Skill

Manage and analyze Detox end-to-end tests for React Native applications.

Core Helper Functions

#!/bin/bash

# Parse Detox configuration
detox_config() {
    if [ -f ".detoxrc.js" ]; then
        node -e "const c = require('./.detoxrc.js'); console.log(JSON.stringify(c, null, 2))" 2>/dev/null
    elif [ -f "detox.config.js" ]; then
        node -e "const c = require('./detox.config.js'); console.log(JSON.stringify(c, null, 2))" 2>/dev/null
    else
        node -e "const pkg = require('./package.json'); console.log(JSON.stringify(pkg.detox || {}, null, 2))" 2>/dev/null
    fi
}

MANDATORY: Discovery-First Pattern

Always discover Detox configuration and device targets before querying specifics.

Phase 1: Discovery

#!/bin/bash

echo "=== Detox Configuration ==="
detox_config | jq '{
    configurations: (.configurations | keys),
    devices: (.devices | keys),
    apps: (.apps | keys),
    testRunner: .testRunner
}' 2>/dev/null

echo ""
echo "=== Detox Version ==="
npx detox --version 2>/dev/null

echo ""
echo "=== Test Files ==="
TEST_DIR=$(detox_config | jq -r '.testRunner.args.testPathPattern // "e2e"' 2>/dev/null || echo "e2e")
find "$TEST_DIR" -name "*.test.ts" -o -name "*.test.js" -o -name "*.spec.ts" -o -name "*.spec.js" 2>/dev/null | head -15

echo ""
echo "=== Available Simulators ==="
xcrun simctl list devices available 2>/dev/null | grep -E "(iPhone|iPad)" | head -10
echo ""
echo "=== Available Emulators ==="
emulator -list-avds 2>/dev/null | head -5

Phase 2: Analysis

#!/bin/bash

echo "=== Build Configurations ==="
detox_config | jq -r '.apps | to_entries[] | "\(.key)\ttype=\(.value.type)\tbuild=\(.value.build // "none" | .[0:60])"' 2>/dev/null | column -t

echo ""
echo "=== Device Configurations ==="
detox_config | jq -r '.devices | to_entries[] | "\(.key)\ttype=\(.value.type)\tdevice=\(.value.device.type // .value.device.avdName // "unknown")"' 2>/dev/null | column -t

echo ""
echo "=== Test Results ==="
ARTIFACTS_DIR="${DETOX_ARTIFACTS_DIR:-artifacts}"
if [ -d "$ARTIFACTS_DIR" ]; then
    LATEST=$(ls -td "$ARTIFACTS_DIR"/*/ 2>/dev/null | head -1)
    if [ -n "$LATEST" ]; then
        echo "Latest artifacts: $LATEST"
        find "$LATEST" -name "*.log" -o -name "*.png" -o -name "*.mp4" 2>/dev/null | wc -l | xargs echo "Artifact files:"
        find "$LATEST" -name "*.log" 2>/dev/null | while read f; do
            echo "--- $(basename $f) (tail) ---"
            tail -5 "$f"
        done | head -20
    fi
fi

Output Rules

• TOKEN EFFICIENCY: Target 50 lines per output
• Summarize build/device configs rather than full Detox config
• Reference artifact paths, never embed screenshots or videos

Anti-Hallucination Rules

• NEVER guess device types or simulator names — discover via system tools
• NEVER fabricate test results — parse actual artifacts and reports
• NEVER assume platform availability — check for Xcode/Android SDK

Safety Rules

• NEVER build or run tests without user confirmation — builds take significant time
• NEVER delete artifacts without explicit user approval
• NEVER modify Detox configuration without user consent

Output Format

Present results as a structured report:

Managing Detox Report
═════════════════════
Resources discovered: [count]

Resource       Status    Key Metric    Issues
──────────────────────────────────────────────
[name]         [ok/warn] [value]       [findings]

Summary: [total] resources | [ok] healthy | [warn] warnings | [crit] critical
Action Items: [list of prioritized findings]

Target ≤50 lines of output. Use tables for multi-resource comparisons.

Counter-Rationalizations