chore: turn reg off for netuid that was on and assert no new emissions

pallets/subtensor/tests/block_step.rs

@@ -868,15 +868,24 @@ fn test_emission_based_on_registration_status() {
                 .len(),
             n as usize
         );
+
+        // drain the emission tuples for the subnet with registration on
+        SubtensorModule::drain_emission(next_block as u64);
         // Turn on registration for the subnet with registration off
         SubtensorModule::set_network_registration_allowed(netuid_off, true);
+        SubtensorModule::set_network_registration_allowed(netuid_on, false);
 
         // Generate emission at the next block
         let next_block: u64 = block + 1;
         SubtensorModule::generate_emission(next_block);
 
         // Verify that emission tuples are now loaded for the subnet with registration turned on
         assert!(SubtensorModule::get_loaded_emission_tuples(netuid_off).is_some());
+        log::info!(
+            "Emissions for netuid with registration on: {:?}",
+            SubtensorModule::get_loaded_emission_tuples(netuid_on)
+        );
+        assert!(SubtensorModule::get_loaded_emission_tuples(netuid_on).is_none());
         assert_eq!(
             SubtensorModule::get_loaded_emission_tuples(netuid_off)
                 .unwrap()