test: add auto tests for playwright feature

Author: sjinks

.github/workflows/features-auto.yml

@@ -42,6 +42,7 @@ jobs:
           - mc
           - memcached
           - nginx
+          - playwright
           - ssh
           - su-exec
           - vip-cli

features/test/playwright/test.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# shellcheck source=/dev/null
+source dev-container-features-test-lib
+
+check "Node.js exists" which node
+check "playwright-core exists" which playwright-core
+
+check "/usr/local/etc/vscode-dev-containers/vip-codespaces/playwright/devcontainer-feature.json exists" test -f /usr/local/etc/vscode-dev-containers/vip-codespaces/playwright/devcontainer-feature.json
+check "/usr/local/etc/vscode-dev-containers/vip-codespaces/playwright/devcontainer-features.env exists" test -f /usr/local/etc/vscode-dev-containers/vip-codespaces/playwright/devcontainer-features.env
+
+# Microsoft's base images contain zsh. We don't want to run this check for MS images because we have no control over the installed services.
+if test -d /etc/rc2.d && ! test -e /usr/bin/zsh; then
+    dir="$(ls -1 /etc/rc2.d)"
+    check "/etc/rc2.d is empty" test -z "${dir}"
+fi
+
+reportResults