tests: add tests for vscode-cache-extensions

Signed-off-by: Georg Lauterbach <44545919+georglauterbach@users.noreply.github.com>

Author: georglauterbach

src/vscode-cache-extensions/devcontainer-feature.json

@@ -3,11 +3,11 @@
   "version": "0.2.2",
   "name": "VS Code | Cache Extensions",
   "documentationURL": "https://github.com/georglauterbach/dev-container-features/tree/main/src/vscode-cache-extensions",
-  "description": "This Fearure prevents superfluous (re-)installations of VS Code extensions upon container restarts.",
+  "description": "This Feature prevents superfluous (re-)installations of VS Code extensions upon container restarts.",
   "mounts": [
     {
       "source": "dev_containers.features.ghcr_io.georglauterbach.vscode_cache_extensions.${devcontainerId}",
-      "target": "/usr/local/share/dev_containers/features/ghcr_io/georglauterbach/vscode_cache_extensions/data",
+      "target": "/usr/local/share/dev_containers/features/ghcr_io/georglauterbach/vscode_cache_extensions",
       "type": "volume"
     }
   ]

src/vscode-cache-extensions/install.sh

@@ -5,7 +5,7 @@
 set -e -u
 
 # This is where the volume will be mounted to
-readonly CACHE_MOUNT_POINT='/usr/local/share/dev_containers/features/ghcr_io/georglauterbach/vscode_cache_extensions/data'
+readonly CACHE_MOUNT_POINT=/usr/local/share/dev_containers/features/ghcr_io/georglauterbach/vscode_cache_extensions/data
 
 if [ -z "${_REMOTE_USER_HOME:-}" ]; then
   exit 0

test/vscode-cache-extensions/_generic.sh

@@ -1,3 +1,52 @@
 #! /bin/sh
 
-exit 1
+FAILED=false
+
+# shellcheck disable=SC2329
+assert_failure() {
+  printf '   ├ %-60s ' "${1:?Name of the test required}"
+  shift 1
+  "${@}" >/dev/null && { printf '❌ \e[31mFAILED\e[0m\n' ; FAILED=true ; return 0 ; }
+  printf '✅ \e[32mPASSED\e[0m\n'
+}
+
+# shellcheck disable=SC2329
+assert_success() {
+  printf '   ├ %-60s ' "${1:?Name of the test required}"
+  shift 1
+  "${@}" >/dev/null && { printf '✅ \e[32mPASSED\e[0m\n' ; return 0 ; }
+  printf '❌ \e[31mFAILED\e[0m\n'
+  FAILED=true
+}
+
+report() {
+  printf "   └ "
+  if ${FAILED:-true}; then
+    printf '❌ \e[31mFAILED\e[0m\n'
+    exit 1
+  else
+    printf "✅ \e[32mPASSED\e[0m\n"
+    exit 0
+  fi
+}
+
+readonly CACHE_MOUNT_POINT=/usr/local/share/dev_containers/features/ghcr_io/georglauterbach/vscode_cache_extensions/data
+
+assert_success 'mount point exists' test -d "${CACHE_MOUNT_POINT}"
+
+assert_success 'stable: symlink target directory exists' test -d "${CACHE_MOUNT_POINT}/stable"
+assert_success 'stable: symlink source directory parent exists' test -d "${HOME}/.vscode-server"
+assert_success 'stable: symlink source directory is a symbolic link' \
+  test -L "${HOME}/.vscode-server/extensions"
+assert_success 'stable: symbolic link resolves to correct location' \
+  test "$(readlink "${HOME}/.vscode-server/extensions")" = "${CACHE_MOUNT_POINT}/stable"
+
+
+assert_success 'insiders: symlink target directory exists' test -d "${CACHE_MOUNT_POINT}/insiders"
+assert_success 'insiders: symlink source directory parent exists' test -d "${HOME}/.vscode-server-insiders"
+assert_success 'insiders: symlink source directory is a symbolic link' \
+  test -L "${HOME}/.vscode-server-insiders/extensions"
+assert_success 'insiders: symbolic link resolves to correct location' \
+  test "$(readlink "${HOME}/.vscode-server-insiders/extensions")" = "${CACHE_MOUNT_POINT}/insiders"
+
+report