add new test for self-weight

pallets/subtensor/src/tests/epoch.rs

@@ -2773,6 +2773,61 @@ fn test_blocks_since_last_step() {
     });
 }
 
+#[test]
+fn test_can_set_self_weight_as_subnet_owner() {
+    new_test_ext(1).execute_with(|| {
+        let subnet_owner_coldkey: U256 = U256::from(1);
+        let subnet_owner_hotkey: U256 = U256::from(1 + 456);
+
+        let other_hotkey: U256 = U256::from(2);
+
+        let stake = 5_000_000_000_000; // 5k TAO
+        let to_emit: u64 = 1_000_000_000; // 1 TAO
+
+        // Create subnet
+        let netuid = add_dynamic_network(&subnet_owner_hotkey, &subnet_owner_coldkey);
+
+        // Register the other hotkey
+        register_ok_neuron(netuid, other_hotkey, subnet_owner_coldkey, 0);
+
+        // Add stake to owner hotkey.
+        SubtensorModule::increase_stake_for_hotkey_and_coldkey_on_subnet(
+            &subnet_owner_hotkey,
+            &subnet_owner_coldkey,
+            netuid,
+            stake,
+        );
+
+        // Give vpermits to owner hotkey ONLY
+        ValidatorPermit::<Test>::insert(netuid, vec![true, false]);
+
+        // Set weight of 50% to each hotkey.
+        // This includes a self-weight
+        let fifty_percent: u16 = u16::MAX / 2;
+        Weights::<Test>::insert(netuid, 0, vec![(0, fifty_percent), (1, fifty_percent)]);
+
+        step_block(1);
+        // Set updated so weights are valid
+        LastUpdate::<Test>::insert(netuid, vec![2, 0]);
+
+        // Run epoch
+        let hotkey_emission: Vec<(U256, u64, u64)> = SubtensorModule::epoch(netuid, to_emit);
+
+        // hotkey_emission is [(hotkey, incentive, dividend)]
+        assert_eq!(hotkey_emission.len(), 2);
+        assert_eq!(hotkey_emission[0].0, subnet_owner_hotkey);
+        assert_eq!(hotkey_emission[1].0, other_hotkey);
+
+        log::debug!("hotkey_emission: {:?}", hotkey_emission);
+        // Both should have received incentive emission
+        assert!(hotkey_emission[0].1 > 0);
+        assert!(hotkey_emission[1].1 > 0);
+
+        // Their incentive should be equal
+        assert_eq!(hotkey_emission[0].1, hotkey_emission[1].1);
+    });
+}
+
 // Map the retention graph for consensus guarantees with an single epoch on a graph with 512 nodes,
 // of which the first 64 are validators, the graph is split into a major and minor set, each setting
 // specific weight on itself and the complement on the other.