Varnish test script

varnish-test.sh

#!/bin/bash

# ========================
# Varnish Cache Test Script for Magento 2
# ========================

# --- Configurable URLs ---
BASE_URL="https://mydomain.com"

# URLs can be comma-separated for multiple testing
URL_HOMEPAGE="/"
URL_PRODUCT="/first-product,/second-product"
URL_CATEGORY="/first-category,/second-category,/second-category/with-subcategory"
URL_CMS="/about-us,/contact"
URL_CART="/checkout/cart"
URL_CHECKOUT="/checkout"
URL_LOGIN="/customer/account/login"
URL_LOGOUT="/customer/account/logout"
URL_ADMIN_LOGIN="/admin"
URL_SEARCH="/catalogsearch/result/?q=shirt"
URL_404="/thisurldoesnotexistsoitshouldgivea404,/thisshouldalsnotexist"

# --- Pages expected to be cached ---
CACHED_URLS=(
  "$URL_HOMEPAGE"
  "$URL_PRODUCT"
  "$URL_CATEGORY"
  "$URL_CMS"
)

# --- Pages NOT expected to be cached ---
NONCACHED_URLS=(
  "$URL_CART"
  "$URL_CHECKOUT"
  "$URL_LOGIN"
  "$URL_LOGOUT"
  "$URL_ADMIN_LOGIN"
  "$URL_SEARCH"
  "$URL_404"
)

# --- Functions ---

function test_cache_hit {
  local path=$1
  local label=$2
  local full_url="${BASE_URL}${path}"

  # First request (prime cache)
  curl -s -o /dev/null -H "Host: $(echo $BASE_URL | awk -F/ '{print $3}')" "$full_url"

  # Second request (check for HIT)
  local header=$(curl -s -o /dev/null -D - "$full_url" | grep -i 'X-Magento-Cache-Debug')
  
  if [ -z "$header" ]; then
    local status="❌ NO HEADER"
  else
    if echo "$header" | grep -q 'HIT'; then
      local status="✅ HIT - $header"
    else
      local status="❌ MISS - $header"
    fi
  fi

  printf "%-100s %s\n" "$full_url" "$status"
}

function test_cache_miss {
  local path=$1
  local label=$2
  local full_url="${BASE_URL}${path}"

  # Just one request, we expect it to be MISS or not have X-Magento-Cache-Debug
  local header=$(curl -s -o /dev/null -D - "$full_url" | grep -i 'X-Magento-Cache-Debug')
  
  if [ -z "$header" ]; then
    local status="✅ NO HEADER (as expected)"
  else
    if echo "$header" | grep -q 'HIT'; then
      local status="⚠️ Unexpected HIT - $header"
    else
      local status="✅ MISS - $header"
    fi
  fi

  printf "%-100s %s\n" "$full_url" "$status"
}

# --- Run Tests ---

echo "== Cached Pages =="
for url_group in "${CACHED_URLS[@]}"; do
  # Split comma-separated URLs
  IFS=',' read -ra url_list <<< "$url_group"
  for url in "${url_list[@]}"; do
    # Trim any whitespace
    url=$(echo "$url" | xargs)
    label="$url"
    test_cache_hit "$url" "$label"
  done
done

echo
echo "== Non-Cached Pages =="
for url_group in "${NONCACHED_URLS[@]}"; do
  # Split comma-separated URLs
  IFS=',' read -ra url_list <<< "$url_group"
  for url in "${url_list[@]}"; do
    # Trim any whitespace
    url=$(echo "$url" | xargs)
    label="$url"
    test_cache_miss "$url" "$label"
  done
done