Add integration test for deleting struct (#459)

Differentially tests the behavior of deleting a struct with a member
that do not occupy the full 32-byte slot. From [this
issue](https://github.com/paritytech/contract-issues/issues/118) it was
unclear whether the `delete` was expected to reset only the bytes
occupied or the entire slot. The current behavior of resetting the
entire slot is expected.

Cargo.lock

@@ -9154,13 +9154,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "revive-replay"
-version = "0.1.0"
-dependencies = [
- "anyhow",
-]
-
 [[package]]
 name = "revive-runner"
 version = "0.4.0"

crates/integration/contracts/StructDeleteStorage.sol

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8;
+
+/* runner.json
+{
+    "differential": true,
+    "actions": [
+        {
+            "Instantiate": {
+                "code": {
+                    "Solidity": {
+                        "contract": "StructDeleteStorage"
+                    }
+                }
+            }
+        },
+        {
+            "Call": {
+                "dest": {
+                    "Instantiated": 0
+                },
+                "data": "e70c830d"
+            }
+        }
+    ]
+}
+*/
+
+contract StructDeleteStorage {
+    struct S {
+        uint8 a;
+    }
+    S s;
+
+    function store_and_delete() public returns (uint256 r1) {
+        assembly {
+            sstore(s.slot, 0xffffff)
+        }
+        delete s;
+        assembly {
+            r1 := sload(s.slot)
+        }
+    }
+}

crates/integration/src/tests.rs

@@ -68,6 +68,11 @@ test_spec!(selfdestruct, "Selfdestruct", "Selfdestruct.sol");
 test_spec!(clz, "CountLeadingZeros", "CountLeadingZeros.sol");
 test_spec!(call_gas, "CallGas", "CallGas.sol");
 test_spec!(linker_symbol, "Linked", "Linked.sol");
+test_spec!(
+    struct_delete_storage,
+    "StructDeleteStorage",
+    "StructDeleteStorage.sol"
+);
 
 fn instantiate(path: &str, contract: &str) -> Vec<SpecsAction> {
     vec![Instantiate {