Modify Tree message unit tests to take new action in to account

See #1433.

tests/tree/test_tree_messages.py

@@ -48,23 +48,26 @@ async def test_tree_node_selected_message() -> None:
         assert pilot.app.messages == ["NodeExpanded", "NodeSelected"]
 
 
+async def test_tree_node_selected_message_no_auto() -> None:
+    """Selecting a node should result in only a selected message being emitted."""
+    async with TreeApp().run_test() as pilot:
+        pilot.app.query_one(MyTree).auto_expand = False
+        await pilot.press("enter")
+        assert pilot.app.messages == ["NodeSelected"]
+
+
 async def test_tree_node_expanded_message() -> None:
     """Expanding a node should result in an expanded message being emitted."""
     async with TreeApp().run_test() as pilot:
-        await pilot.press("enter")
+        await pilot.press("space")
-        assert pilot.app.messages == ["NodeExpanded", "NodeSelected"]
+        assert pilot.app.messages == ["NodeExpanded"]
 
 
 async def test_tree_node_collapsed_message() -> None:
     """Collapsing a node should result in a collapsed message being emitted."""
     async with TreeApp().run_test() as pilot:
-        await pilot.press("enter", "enter")
+        await pilot.press("space", "space")
-        assert pilot.app.messages == [
+        assert pilot.app.messages == ["NodeExpanded", "NodeCollapsed"]
-            "NodeExpanded",
-            "NodeSelected",
-            "NodeCollapsed",
-            "NodeSelected",
-        ]
 
 
 async def test_tree_node_highlighted_message() -> None: