test(blockifier): replace class revert

test(blockifier): replace class revert

crates/blockifier/feature_contracts/cairo1/test_contract.cairo

@@ -624,6 +624,7 @@ mod TestContract {
         entry_point_selector: felt252,
         calldata: Array::<felt252>
     ) {
+        let class_hash_before_call = syscalls::get_class_hash_at_syscall(contract_address).unwrap_syscall();
          match syscalls::call_contract_syscall(
             contract_address, entry_point_selector, calldata.span())
         {
@@ -642,7 +643,8 @@ mod TestContract {
                 }
             },
         };
-        // TODO(Yoni, 1/12/2024): test replace class once get_class_hash_at syscall is supported.
+        let class_hash_after_call = syscalls::get_class_hash_at_syscall(contract_address).unwrap_syscall();
         assert(self.my_storage_var.read() == 0, 'values should not change.');
+        assert(class_hash_before_call == class_hash_after_call, 'class hash should not change if the tx reverted.');
     }
 }

crates/blockifier/src/execution/syscalls/syscall_tests/call_contract.rs

@@ -16,7 +16,6 @@ use crate::execution::call_info::CallExecution;
 use crate::execution::contract_class::TrackedResource;
 use crate::execution::entry_point::CallEntryPoint;
 use crate::retdata;
-use crate::state::state_api::StateReader;
 use crate::test_utils::contracts::FeatureContract;
 use crate::test_utils::initial_test_state::test_state;
 use crate::test_utils::syscall::build_recurse_calldata;
@@ -62,10 +61,6 @@ fn test_call_contract_that_panics() {
     );
     assert!(inner_call.execution.events.is_empty());
     assert!(inner_call.execution.l2_to_l1_messages.is_empty());
-    assert_eq!(
-        state.get_class_hash_at(inner_call.call.storage_address).unwrap(),
-        test_contract.get_class_hash()
-    );
 }
 
 #[cfg_attr(