fix(e2e): stabilize Linux UI tests on small Xvfb display

.github/workflows/linuxUI.yml

@@ -18,7 +18,10 @@ jobs:
       run: |
         sudo apt-get update
         sudo apt-get install -y libxkbfile-dev pkg-config libsecret-1-dev libxss1 dbus xvfb libgtk-3-0 libgbm1
-        sudo /usr/bin/Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
+        # Use 1920x1080 so the Java Projects view (rendered inside the Explorer
+        # sidebar) gets enough vertical space. With 1024x768 the sticky
+        # pane-header overlapped tree rows and intercepted click events.
+        sudo /usr/bin/Xvfb :99 -screen 0 1920x1080x24 > /dev/null 2>&1 &
         sleep 3
 
     - name: Set up JDK 21

test/e2e-plans/java-dep-file-operations.yaml

@@ -25,14 +25,32 @@ setup:
   timeout: 180
   settings:
     java.configuration.checkProjectSettingsExclusions: false
+    workbench.startupEditor: "none"
 
 steps:
-  # ── Setup: wait for LS, focus Java Projects ──
+  # ── Setup: wait for LS, free Explorer space, focus Java Projects ──
   - id: "ls-ready"
     action: "waitForLanguageServer"
     verify: "Java Language Server is ready"
     timeout: 180
 
+  # Free horizontal space (Chat panel can take ~210px on right side)
+  - id: "close-aux-bar"
+    action: "executeVSCodeCommand workbench.action.closeAuxiliaryBar"
+    verify: "Auxiliary bar (Chat) closed"
+
+  # Free vertical space inside Explorer so JAVA PROJECTS gets room.
+  # Without this the Java Projects pane-header overlaps tree rows on
+  # 1024x768 CI displays and click events get intercepted by the sticky header.
+  - id: "collapse-outline"
+    action: "collapseSidebarSection OUTLINE"
+
+  - id: "collapse-timeline"
+    action: "collapseSidebarSection TIMELINE"
+
+  - id: "collapse-workspace-root"
+    action: "collapseWorkspaceRoot"
+
   - id: "focus-java-projects"
     action: "run command Java Projects: Focus on Java Projects View"
     verify: "Java Projects view is focused"
@@ -68,11 +86,22 @@ steps:
     timeout: 15
 
   # ── Test 2: create new package ──
+  # Close the editor opened by the previous step. With link-with-editor on,
+  # an open editor causes the JAVA PROJECTS tree to auto-expand, pushing
+  # my-app right under the sticky pane-header where clicks get intercepted.
+  - id: "close-editors-before-pkg"
+    action: "run command View: Close All Editors"
+
+  - id: "collapse-workspace-root-2"
+    action: "collapseWorkspaceRoot"
+
   - id: "focus-java-projects-2"
     action: "run command Java Projects: Focus on Java Projects View"
+    waitBefore: 1
 
   - id: "click-project-node-2"
     action: "click my-app tree item"
+    waitBefore: 1
 
   - id: "trigger-new-resource-2"
     action: "clickTreeItemAction my-app New..."
@@ -99,6 +128,9 @@ steps:
     action: "open file AppToRename.java"
     waitBefore: 3
 
+  - id: "collapse-workspace-root-3"
+    action: "collapseWorkspaceRoot"
+
   - id: "focus-java-projects-3"
     action: "run command Java Projects: Focus on Java Projects View"
     waitBefore: 3
@@ -146,6 +178,9 @@ steps:
     action: "open file AppToDelete.java"
     waitBefore: 5
 
+  - id: "collapse-workspace-root-4"
+    action: "collapseWorkspaceRoot"
+
   - id: "focus-java-projects-4"
     action: "run command Java Projects: Focus on Java Projects View"
     waitBefore: 2

test/e2e-plans/java-dep-project-explorer.yaml

@@ -21,6 +21,7 @@ setup:
   timeout: 180
   settings:
     java.configuration.checkProjectSettingsExclusions: false
+    workbench.startupEditor: "none"
 
 steps:
   # ── Wait for LS ready ──
@@ -29,6 +30,20 @@ steps:
     verify: "Java Language Server is ready"
     timeout: 180
 
+  # Free horizontal & vertical space so JAVA PROJECTS gets enough room.
+  - id: "close-aux-bar"
+    action: "executeVSCodeCommand workbench.action.closeAuxiliaryBar"
+    verify: "Auxiliary bar (Chat) closed"
+
+  - id: "collapse-outline"
+    action: "collapseSidebarSection OUTLINE"
+
+  - id: "collapse-timeline"
+    action: "collapseSidebarSection TIMELINE"
+
+  - id: "collapse-workspace-root"
+    action: "collapseWorkspaceRoot"
+
   # ── Test 1: javaProjectExplorer.focus ──
   - id: "focus-java-projects"
     action: "run command Java Projects: Focus on Java Projects View"
@@ -45,11 +60,13 @@ steps:
     timeout: 15
 
   # ── Test 2: linkWithFolderExplorer ──
+  # NOTE: action resolver only matches "expandTreeItem <name>" — strings like
+  # "expand my-app tree item" silently fall back to command palette and no-op.
   - id: "expand-project"
-    action: "expand my-app tree item"
+    action: "expandTreeItem my-app"
 
   - id: "expand-src"
-    action: "expand src/main/java tree item"
+    action: "expandTreeItem src/main/java"
     waitBefore: 2
 
   - id: "verify-package"
@@ -60,7 +77,7 @@ steps:
     timeout: 15
 
   - id: "expand-package"
-    action: "expand com.mycompany.app tree item"
+    action: "expandTreeItem com.mycompany.app"
     waitBefore: 2
 
   - id: "verify-app-class"
@@ -72,8 +89,12 @@ steps:
     timeout: 15
 
   # ── Test 3: unlinkWithFolderExplorer ──
+  # Click the title-bar action ("Unlink with Editor") in the JAVA PROJECTS pane.
+  # When `config.java.dependency.syncWithFolderExplorer == true` (the default),
+  # the package contributes the Unlink button to overflow_10@20 — clickViewTitleAction
+  # locates it directly or via the "Views and More Actions..." overflow menu.
   - id: "unlink-editor"
-    action: "run command Java: Unlink with Editor"
+    action: 'clickViewTitleAction "Java Projects" "Unlink with Editor"'
     verify: "Editor unlinked from tree"
 
   - id: "open-rename-file"
@@ -84,11 +105,12 @@ steps:
     verify: "Tree should not auto-expand to AppToRename"
 
   - id: "relink-editor"
-    action: "run command Java: Link with Editor"
+    action: 'clickViewTitleAction "Java Projects" "Link with Editor"'
     verify: "Editor re-linked with tree"
 
   # ── Test 4: revealInProjectExplorer ──
-  # Collapse all tree nodes, then reveal App.java from editor
+  # Collapse all tree nodes, then reveal App.java by right-clicking the editor tab
+  # → "Reveal in Java Project Explorer" (contributed to editor/title/context).
   - id: "collapse-all"
     action: "run command View: Collapse All"
     verify: "Collapse tree to reset state"
@@ -98,7 +120,7 @@ steps:
     waitBefore: 2
 
   - id: "reveal-in-project-explorer"
-    action: "run command Java: Reveal in Java Project Explorer"
+    action: 'contextMenuOnEditorTab "App.java" "Reveal in Java Project Explorer"'
     waitBefore: 2
 
   - id: "verify-revealed"