Adds a test for lockbox_input_value()

zebra-consensus/src/block/subsidy/general.rs

@@ -421,4 +421,42 @@ mod test {
 
         Ok(())
     }
+
+    #[test]
+    fn check_lockbox_input_value() -> Result<(), Report> {
+        let _init_guard = zebra_test::init();
+
+        let network = Network::Mainnet;
+        let nu6_height = Nu6.activation_height(&network).unwrap();
+        let post_nu6_funding_streams = network.post_nu6_funding_streams();
+        let height_range = post_nu6_funding_streams.height_range();
+
+        let last_funding_stream_height = post_nu6_funding_streams
+            .height_range()
+            .end
+            .previous()
+            .expect("the previous height should be valid");
+
+        assert_eq!(
+            Amount::<NonNegative>::zero(),
+            lockbox_input_value(&network, Height::MIN)
+        );
+
+        let expected_lockbox_value: Amount<NonNegative> = Amount::try_from(18_750_000)?;
+        assert_eq!(
+            expected_lockbox_value,
+            lockbox_input_value(&network, nu6_height)
+        );
+
+        let num_blocks_total = height_range.end.0 - height_range.start.0;
+        let expected_input_per_block: Amount<NonNegative> = Amount::try_from(18_750_000)?;
+        let expected_lockbox_value = (expected_input_per_block * num_blocks_total.into())?;
+
+        assert_eq!(
+            expected_lockbox_value,
+            lockbox_input_value(&network, last_funding_stream_height)
+        );
+
+        Ok(())
+    }
 }