fix the test

Signed-off-by: xermicus <[email protected]>

crates/integration/src/mock_runtime.rs

@@ -350,6 +350,10 @@ impl State {
     pub fn accounts(&self) -> &HashMap<Address, Account> {
         &self.accounts
     }
+
+    pub fn accounts_mut(&mut self) -> &mut HashMap<Address, Account> {
+        &mut self.accounts
+    }
 }
 
 fn link_host_functions(engine: &Engine) -> Linker<Transaction> {

crates/integration/src/tests.rs

@@ -575,15 +575,18 @@ fn balance() {
     assert_eq!(expected, received);
 
     let expected = U256::from(54589);
-    let (state, address) = State::new_deployed(Contract::call_constructor());
+    let (mut state, address) = State::new_deployed(Contract::value_balance_of(Default::default()));
+    state.accounts_mut().get_mut(&address).unwrap().value = expected;
+
     let contract = Contract::value_balance_of(address);
     let (_, output) = state
         .transaction()
         .with_default_account(&contract.pvm_runtime)
         .calldata(contract.calldata)
-        .callvalue(expected)
         .call();
 
+    assert_eq!(ReturnFlags::Success, output.flags);
+
     let received = U256::from_be_slice(&output.data);
     assert_eq!(expected, received)
 }