test(autotest): assert JDK dropdown opens after migration

Add two steps that click the JDK Runtime tab's <vscode-single-select>
(id="jdk-dropdown") and capture the open state. We do not assert which
JDKs the runner exposes — only that the dropdown still opens, which is
what the React 19 + @vscode-elements migration could regress.

Pin the autotest CLI to ^0.7.0 so CI picks up the new clickInWebview
action (publishing 0.7.0 happens separately on the autotest repo).

Also ignore test-results/ — those are local autotest artifacts.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: wenytang-ms

.github/workflows/e2e-autotest.yml

@@ -130,7 +130,7 @@ jobs:
           java-version: 21
 
       - name: Install autotest CLI
-        run: npm install -g @vscjava/vscode-autotest
+        run: npm install -g @vscjava/vscode-autotest@^0.7.0
 
       - name: Download PR VSIX (vscode-java-pack from branch)
         if: ${{ github.event_name == 'pull_request' }}
@@ -234,7 +234,7 @@ jobs:
           node-version: 20
 
       - name: Install autotest CLI
-        run: npm install -g @vscjava/vscode-autotest
+        run: npm install -g @vscjava/vscode-autotest@^0.7.0
 
       - name: Download all results
         uses: actions/download-artifact@v4

.gitignore

@@ -64,3 +64,7 @@ out/
 .vscode-test
 
 *.vsix
+
+# Autotest local outputs
+test-results/
+

test-plans/java-webview-migration.yaml

@@ -158,6 +158,21 @@ steps:
         - "JDK Runtime"
     timeout: 30
 
+  # Regression check: clicking the JDK dropdown opens a list. We do not
+  # enumerate which JDKs appear (that depends on the host runner), only
+  # that the vscode-elements <vscode-single-select> still wires up after
+  # the React 19 migration. clickInWebview throws if #jdk-dropdown is
+  # not present in any webview frame, so a silent migration regression
+  # surfaces as a hard error rather than a no-op pass.
+  - id: "open-jdk-dropdown"
+    action: "clickInWebview #jdk-dropdown"
+    verify: "JDK dropdown opens listing detected runtimes"
+    waitBefore: 1
+
+  - id: "verify-jdk-dropdown"
+    action: "wait 2 seconds"
+    verify: "screenshot shows the JDK dropdown expanded with at least one runtime entry"
+
   - id: "close-java-runtime"
     action: "run command View: Close All Editors"