Add CI test workflow for base image

Author: shokkunrf

.github/workflows/ci-test-images.yml

@@ -0,0 +1,58 @@
+name: CI - Test Images
+
+on:
+  push:
+    branches:
+      - develop
+    paths:
+      - "images/**"
+  pull_request:
+    paths:
+      - "images/**"
+  workflow_dispatch:
+
+jobs:
+  detect:
+    runs-on: ubuntu-latest
+    outputs:
+      images: ${{ steps.set-matrix.outputs.images }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Detect changed images
+        id: set-matrix
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            images=$(ls -d images/*/ | xargs -n1 basename | jq -R -s -c 'split("\n")[:-1]')
+          elif [ "${{ github.event_name }}" = "pull_request" ]; then
+            base="${{ github.event.pull_request.base.sha }}"
+            images=$(git diff --name-only "$base" HEAD -- images/ | cut -d/ -f2 | sort -u | jq -R -s -c 'split("\n")[:-1]')
+          else
+            images=$(git diff --name-only "${{ github.event.before }}" HEAD -- images/ | cut -d/ -f2 | sort -u | jq -R -s -c 'split("\n")[:-1]')
+          fi
+          echo "images=$images" >> $GITHUB_OUTPUT
+
+  test:
+    needs: detect
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        image: ${{ fromJson(needs.detect.outputs.images) }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install devcontainer CLI
+        run: npm install -g @devcontainers/cli
+
+      - name: Build image
+        run: devcontainer up --workspace-folder images/${{ matrix.image }}
+
+      - name: Run tests
+        run: |
+          devcontainer exec --workspace-folder images/${{ matrix.image }} \
+            /bin/sh -c 'if [ -f test-project/test.sh ]; then cd test-project && chmod +x test.sh && ./test.sh; else echo "No test-project/test.sh found, skipping."; fi'

images/base/README.md

@@ -10,8 +10,20 @@ Base devcontainer image with common tools.
 }
 ```
 
-## Included Features
+## Included Tools
 
-- [Claude Code](../features/claude-code)
-- [Gemini Cli](../features/gemini-cli)
-- [Prettier](../features/prettier)
+| Tool | Source |
+| --- | --- |
+| common-utils (`developer` user, UID/GID 1000) | [devcontainers/features/common-utils](https://github.com/devcontainers/features/tree/main/src/common-utils) |
+| git | [devcontainers/features/git](https://github.com/devcontainers/features/tree/main/src/git) |
+| Node.js 24 + npm | [devcontainers/features/node](https://github.com/devcontainers/features/tree/main/src/node) |
+| prettier | [prettier](https://www.npmjs.com/package/prettier) |
+| Claude Code | [@anthropic-ai/claude-code](https://www.npmjs.com/package/@anthropic-ai/claude-code) |
+| Gemini CLI | [@google/gemini-cli](https://www.npmjs.com/package/@google/gemini-cli) |
+
+## Testing
+
+```bash
+devcontainer up --workspace-folder images/base
+devcontainer exec --workspace-folder images/base /bin/sh -c 'cd test-project && chmod +x test.sh && ./test.sh'
+```

images/base/test-project/test-utils.sh

@@ -0,0 +1,49 @@
+#!/bin/sh
+
+USERNAME=${1:-developer}
+
+if [ -z "$HOME" ]; then
+    HOME="/root"
+fi
+
+FAILED=""
+
+check() {
+    LABEL=$1
+    shift
+    printf '\n🧪 Testing %s\n' "$LABEL"
+    if "$@"; then
+        echo "✅  Passed!"
+        return 0
+    else
+        echo "❌ $LABEL check failed."
+        FAILED="$FAILED $LABEL"
+        return 1
+    fi
+}
+
+check_version_ge() {
+    LABEL=$1
+    CURRENT_VERSION=$2
+    REQUIRED_VERSION=$3
+    printf '\n🧪 Testing %s: '\''%s'\'' is >= '\''%s'\''\n' "$LABEL" "$CURRENT_VERSION" "$REQUIRED_VERSION"
+    GREATER_VERSION=$(printf '%s\n%s\n' "$CURRENT_VERSION" "$REQUIRED_VERSION" | sort -V | tail -1)
+    if [ "$CURRENT_VERSION" = "$GREATER_VERSION" ]; then
+        echo "✅  Passed!"
+        return 0
+    else
+        echo "❌ $LABEL check failed."
+        FAILED="$FAILED $LABEL"
+        return 1
+    fi
+}
+
+reportResults() {
+    if [ -n "$FAILED" ]; then
+        printf '\n💥  Failed tests:%s\n' "$FAILED"
+        exit 1
+    else
+        printf '\n💯  All passed!\n'
+        exit 0
+    fi
+}

images/base/test-project/test.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+cd "$(dirname "$0")"
+
+. ./test-utils.sh developer
+
+# User checks
+check "non-root-user" id ${USERNAME}
+check "uid" test "$(id -u ${USERNAME})" = "1000"
+check "gid" test "$(id -g ${USERNAME})" = "1000"
+
+# Tool checks
+check "git" git --version
+check "node" node --version
+
+node_version=$(node --version)
+check_version_ge "node-requirement" "${node_version}" "v24.0.0"
+
+check "npm" npm --version
+check "prettier" prettier --version
+check "claude" claude --version
+check "gemini" gemini --version
+
+# Config checks
+check "prettierrc" test -f /workspaces/.prettierrc
+
+# Report result
+reportResults