integration: add create2 test case with duplicate salt (#188)

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>

crates/integration/contracts/Create2.sol

@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8;
+
+/* runner.json
+{
+    "differential": true,
+    "actions": [
+        {
+            "Upload": {
+                "code": {
+                    "Solidity": {
+                        "contract": "CreateA"
+                    }
+                }
+            }
+        },
+        {
+            "Instantiate": {
+                "code": {
+                    "Solidity": {
+                        "contract": "CreateB"
+                    }
+                },
+                "value": 100000
+            }
+        }
+    ]
+}
+*/
+
+contract CreateA {
+    constructor() payable {}
+}
+
+contract CreateB {
+    constructor() payable {
+        bytes32 salt = hex"ff";
+
+        try new CreateA{salt: salt}() returns (CreateA) {} catch {
+            revert("the first instantiation should succeed");
+        }
+
+        try new CreateA{salt: salt}() returns (CreateA) {} catch {
+            return;
+        }
+
+        revert("the second instantiation should have failed");
+    }
+}

crates/integration/src/tests.rs

@@ -51,6 +51,7 @@ test_spec!(gas_left, "GasLeft", "GasLeft.sol");
 test_spec!(gas_limit, "GasLimit", "GasLimit.sol");
 test_spec!(base_fee, "BaseFee", "BaseFee.sol");
 test_spec!(coinbase, "Coinbase", "Coinbase.sol");
+test_spec!(create2, "CreateB", "Create2.sol");
 
 fn instantiate(path: &str, contract: &str) -> Vec<SpecsAction> {
     vec![Instantiate {
@@ -433,33 +434,3 @@ fn ext_code_size() {
     }
     .run();
 }
-
-/*
-// These test were implement for the mock-runtime and need to be ported yet.
-
-#[test]
-fn create2_failure() {
-    let mut state = State::default();
-    let contract_a = Contract::create_a();
-    state.upload_code(&contract_a.pvm_runtime);
-
-    let contract = Contract::create_b();
-    let (state, output) = state
-        .transaction()
-        .with_default_account(&contract.pvm_runtime)
-        .calldata(contract.calldata.clone())
-        .call();
-
-    assert_eq!(output.flags, ReturnFlags::Success);
-
-    // The address already exists, which should cause the contract to revert
-
-    let (_, output) = state
-        .transaction()
-        .with_default_account(&contract.pvm_runtime)
-        .calldata(contract.calldata)
-        .call();
-
-    assert_eq!(output.flags, ReturnFlags::Revert);
-}
-*/