Mock resampler: Improve variable names

Since the mock resampler uses a pair of channels, one to receive
samples to be (fakely) resampled (input) and one to send the (fakely)
resampmled samples (output), we should use clear names to identify both
otherwise is really hard to follow which is which when reading the code.

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>

tests/timeseries/mock_resampler.py

@@ -45,7 +45,7 @@ def __init__(  # pylint: disable=too-many-arguments
         self._resampler_request_channel = Broadcast[ComponentMetricRequest](
             "resampler-request"
         )
-        self._basic_receivers: dict[str, list[Receiver[Sample[Quantity]]]] = {}
+        self._input_channels_receivers: dict[str, list[Receiver[Sample[Quantity]]]] = {}
 
         def power_senders(
             comp_ids: list[int],
@@ -58,7 +58,7 @@ def power_senders(
                         Sample[Quantity], name
                     ).new_sender()
                 )
-                self._basic_receivers[name] = [
+                self._input_channels_receivers[name] = [
                     self._channel_registry.get_or_create(
                         Sample[Quantity], name
                     ).new_receiver()
@@ -77,7 +77,7 @@ def frequency_senders(
                         Sample[Quantity], name
                     ).new_sender()
                 )
-                self._basic_receivers[name] = [
+                self._input_channels_receivers[name] = [
                     self._channel_registry.get_or_create(
                         Sample[Quantity], name
                     ).new_receiver(name)
@@ -119,19 +119,19 @@ def multi_phase_senders(
                         ).new_sender(),
                     ]
                 )
-                self._basic_receivers[p1_name] = [
+                self._input_channels_receivers[p1_name] = [
                     self._channel_registry.get_or_create(
                         Sample[Quantity], p1_name
                     ).new_receiver()
                     for _ in range(namespaces)
                 ]
-                self._basic_receivers[p2_name] = [
+                self._input_channels_receivers[p2_name] = [
                     self._channel_registry.get_or_create(
                         Sample[Quantity], p2_name
                     ).new_receiver()
                     for _ in range(namespaces)
                 ]
-                self._basic_receivers[p3_name] = [
+                self._input_channels_receivers[p3_name] = [
                     self._channel_registry.get_or_create(
                         Sample[Quantity], p3_name
                     ).new_receiver()
@@ -222,15 +222,18 @@ async def _handle_resampling_requests(self) -> None:
             name = request.get_channel_name()
             if name in self._forward_tasks:
                 continue
-            basic_recv_name = f"{request.component_id}:{request.metric_id}"
-            recv = self._basic_receivers[basic_recv_name].pop()
-            assert recv is not None
+            input_chan_recv_name = f"{request.component_id}:{request.metric_id}"
+            input_chan_recv = self._input_channels_receivers[input_chan_recv_name].pop()
+            assert input_chan_recv is not None
+            output_chan_sender: Sender[Sample[Quantity]] = (
+                self._channel_registry.get_or_create(
+                    Sample[Quantity], name
+                ).new_sender()
+            )
             task = asyncio.create_task(
                 self._channel_forward_messages(
-                    recv,
-                    self._channel_registry.get_or_create(
-                        Sample[Quantity], name
-                    ).new_sender(),
+                    input_chan_recv,
+                    output_chan_sender,
                 ),
                 name=name,
             )