ci: add autotest cases and pipeline

.github/workflows/pr-ui-autotest.yml

@@ -0,0 +1,51 @@
+name: PR UI AutoTest
+
+on:
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  ui-test:
+    runs-on: windows-latest
+    timeout-minutes: 30
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build extension
+        run: npm run build
+
+      - name: Package PR VSIX
+        run: npx @vscode/vsce@latest package -o extension.vsix
+
+      - name: Install autotest CLI
+        run: npm install -g @vscjava/vscode-autotest
+
+      - name: Run Help Center webview UI test
+        shell: pwsh
+        run: |
+          $vsixPath = Join-Path (Get-Location) "extension.vsix"
+          autotest run test-plans\java-pack-help-center-webview.yaml --vsix $vsixPath --no-llm
+
+      - name: Upload UI test results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: pr-ui-autotest-results
+          path: test-results/
+          retention-days: 30

test-plans/java-pack-help-center-webview.yaml

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+# Test Plan: Java Extension Pack - Help Center webview
+#
+# Covers the React/vscode-elements webview migration by opening the local
+# vscode-java-pack Help Center and verifying key content from inside the webview.
+#
+# Usage after packaging vscode-java-pack:
+#   npx autotest run test-plans\java-pack-help-center-webview.yaml --vsix extension.vsix --no-llm
+
+name: "Java Extension Pack - Help Center Webview"
+description: |
+  Opens the Java Help Center webview from the installed vscode-java-pack VSIX
+  and verifies that the migrated React webview renders its main sections.
+
+setup:
+  extension: "redhat.java"
+  vscodeVersion: "stable"
+  timeout: 60
+  settings:
+    java.help.showReleaseNotes: false
+    java.help.firstView: "none"
+
+steps:
+  - id: "open-help-center"
+    action: "executeVSCodeCommand java.welcome"
+    verifyEditorTab:
+      title: "Java Help Center"
+    timeout: 20
+
+  - id: "verify-help-center-content"
+    action: "wait 2 seconds"
+    verifyWebview:
+      contains:
+        - "Java Help Center"
+        - "Get Started"
+        - "Create a New Project"
+        - "Configure Java Runtime"
+        - "Open Java Settings"
+    timeout: 20