fix: use assert_reject_reason in airdrop and meme_coin tests

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: sdbondi

wasm_templates/airdrop/tests/test.rs

@@ -79,7 +79,7 @@ fn test_airdrop_add_recipient_airdrop_allow_list_full() {
 
     // add recipients
     for _ in 0..100 {
-        let (_account_component, owner_proof, account_secret_key) = test.create_funded_account();
+        let (account_component, owner_proof, account_secret_key) = test.create_funded_account();
         let result = test.execute_expect_success(
             Transaction::builder_localnet()
                 .call_method(

wasm_templates/meme_coin/tests/test.rs

@@ -1,6 +1,6 @@
-use tari_template_test_tooling::engine_types::commit_result::RejectReason;
 use tari_template_lib::types::{Amount, ComponentAddress, amount, NonFungibleAddress, Metadata};
 use tari_template_test_tooling::crypto::RistrettoSecretKey;
+use tari_template_test_tooling::support::assert_error::assert_reject_reason;
 use tari_template_test_tooling::TemplateTest;
 use tari_template_test_tooling::transaction::{args, Transaction};
 
@@ -77,17 +77,7 @@ fn test_memecoin_owner_only_allowed_method() {
             .build_and_seal(&account_secret_key),
         vec![owner_proof.clone()],
     );
-    assert!(matches!(reject_reason, RejectReason::ExecutionFailure(_)));
-    if let RejectReason::ExecutionFailure(reason) = reject_reason {
-        assert!(reason.starts_with("Access Denied:"));
-        assert!(reason.contains(
-            format!(
-                "call component method 'burn' on {}",
-                meme_coin_result.meme_coin_component
-            )
-                .as_str()
-        ));
-    }
+    assert_reject_reason(reject_reason, "call component method 'burn'");
 }
 
 #[test]