Fixtures: Add support for Process inputs to submit_and_await (#5780)

Currently the `submit_and_await` fixture did allow passing a `Process`
class, but not to provide the inputs needed to instantiate it. The
fixture now accepts `kwargs` which are used as the inputs in the case
that `submittable` is a process class.

aiida/manage/tests/pytest_fixtures.py

@@ -13,6 +13,7 @@
 
 import asyncio
 import copy
+import inspect
 import pathlib
 import shutil
 import tempfile
@@ -288,20 +289,26 @@ def submit_and_await(started_daemon_client):
     def _factory(
         submittable: Process | ProcessBuilder | ProcessNode,
         state: plumpy.ProcessState = plumpy.ProcessState.FINISHED,
-        timeout: int = 20
+        timeout: int = 20,
+        **kwargs
     ):
         """Submit a process and wait for it to achieve the given state.
 
         :param submittable: A process, a process builder or a process node. If it is a process or builder, it is
             submitted first before awaiting the desired state.
         :param state: The process state to wait for, by default it waits for the submittable to be ``FINISHED``.
         :param timeout: The time to wait for the process to achieve the state.
+        :param kwargs: If the ``submittable`` is a process class, it is instantiated with the ``kwargs`` as inputs.
         :raises RuntimeError: If the process fails to achieve the specified state before the timeout expires.
         """
-        if not isinstance(submittable, ProcessNode):
+        if inspect.isclass(submittable) and issubclass(submittable, Process):
+            node = submit(submittable, **kwargs)
+        elif isinstance(submittable, ProcessBuilder):
             node = submit(submittable)
-        else:
+        elif isinstance(submittable, ProcessNode):
             node = submittable
+        else:
+            raise ValueError(f'type of submittable `{type(submittable)}` is not supported.')
 
         start_time = time.time()