add test

src/zrb/task/cmd_task.py

@@ -260,8 +260,14 @@ def _on_kill(self, signum: Any, frame: Any):
         self.print_out_dark(f'Getting signal {signum}')
         for pid in self._pids:
             self._kill_by_pid(pid)
-        self.print_out_dark(f'Exiting with signal {signum}')
+        tasks = asyncio.all_tasks()
+        for task in tasks:
+            try:
+                task.cancel()
+            except Exception as e:
+                self.print_err(e)
         time.sleep(0.3)
+        self.print_out_dark(f'Exiting with signal {signum}')
         sys.exit(signum)
 
     def _on_exit(self):

test/task/test_task.py

@@ -271,7 +271,7 @@ def _run(*args, **kwargs) -> str:
     del os.environ['COLOR']
 
 
-def test_task_redeclared_env():
+def test_task_duplicate_env():
     '''
     When env exist, it should override env_file,
     If two env has the same name, the later should override the first one