Fix handling of extension last activity (#1145)

Fixes #1135

jupyter_server/serverapp.py

@@ -480,7 +480,7 @@ def last_activity(self):
         # counted here. This provides a hook for extensions to add a last activity
         # setting to the server.
         sources.extend(
-            [key for key, val in self.settings.items() if key.endswith("_last_activity")]
+            [val for key, val in self.settings.items() if key.endswith("_last_activity")]
         )
         sources.extend(self.settings["last_activity_times"].values())
         return max(sources)

tests/test_terminal.py

@@ -9,6 +9,8 @@
 from tornado.httpclient import HTTPClientError
 from traitlets.config import Config
 
+from jupyter_server._tz import isoformat
+
 
 @pytest.fixture
 def terminal_path(tmp_path):
@@ -67,7 +69,7 @@ async def test_no_terminals(jp_fetch):
     assert len(data) == 0
 
 
-async def test_terminal_create(jp_fetch):
+async def test_terminal_create(jp_fetch, jp_serverapp):
     resp = await jp_fetch(
         "api",
         "terminals",
@@ -115,7 +117,7 @@ async def test_terminal_create_with_kwargs(jp_fetch, jp_ws_fetch, terminal_path)
     assert data["name"] == term_name
 
 
-async def test_terminal_create_with_cwd(jp_fetch, jp_ws_fetch, terminal_path):
+async def test_terminal_create_with_cwd(jp_fetch, jp_ws_fetch, terminal_path, jp_serverapp):
     resp = await jp_fetch(
         "api",
         "terminals",
@@ -147,6 +149,12 @@ async def test_terminal_create_with_cwd(jp_fetch, jp_ws_fetch, terminal_path):
 
     assert os.path.basename(terminal_path) in message_stdout
 
+    resp = await jp_fetch("api", "status")
+    data = json.loads(resp.body.decode())
+    assert data["last_activity"] == isoformat(
+        jp_serverapp.web_app.settings["terminal_last_activity"]
+    )
+
 
 @pytest.mark.skip(reason="Not yet working")
 async def test_terminal_create_with_relative_cwd(