Use ! is_empty instead of len > 0

As directed by clippy use `!a.is_empty()` instead of `a.len() > 0`.

diff --git a/testutils/src/lib.rs b/testutils/src/lib.rs
index c60573e273ee1e2eed39290a79fc506dbb0a1099..3a0e5b630528a96d8799104b71b22adb63a02bdc 100644 (file)
--- a/testutils/src/lib.rs
+++ b/testutils/src/lib.rs
@@ -349,7 +349,7 @@ impl TestClient {
 
     pub fn receive(&mut self, meta_tx: TestIncomingTx) -> Txid {
         assert!(
-            meta_tx.output.len() > 0,
+            !meta_tx.output.is_empty(),
             "can't create a transaction with no outputs"
         );