Shanghai compat test

crates/forge/tests/it/spec.rs

@@ -1,10 +1,14 @@
 //! Integration tests for EVM specifications.
 
-use crate::{config::*, test_helpers::TEST_DATA_DEFAULT};
+use crate::{config::*, test_helpers::TEST_DATA_PARIS};
+use foundry_evm::revm::primitives::SpecId;
 use foundry_test_utils::Filter;
 
 #[tokio::test(flavor = "multi_thread")]
 async fn test_shanghai_compat() {
     let filter = Filter::new("", "ShanghaiCompat", ".*spec");
-    TestConfig::with_filter(TEST_DATA_DEFAULT.runner(), filter).run().await;
+    TestConfig::with_filter(TEST_DATA_PARIS.runner(), filter)
+        .evm_spec(SpecId::SHANGHAI)
+        .run()
+        .await;
 }

testdata/paris/spec/ShanghaiCompat.t.sol

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.18;
+
+import "ds-test/test.sol";
+import "cheats/Vm.sol";
+
+contract ShanghaiCompat is DSTest {
+    Vm constant vm = Vm(HEVM_ADDRESS);
+
+    function testPush0() public {
+        address target = address(uint160(uint256(0xc4f3)));
+
+        bytes memory bytecode = hex"365f5f37365ff3";
+        // 36 CALLDATASIZE
+        // 5F PUSH0
+        // 5F PUSH0
+        // 37 CALLDATACOPY -> copies calldata at mem[0..calldatasize]
+
+        // 36 CALLDATASIZE
+        // 5F PUSH0
+        // F3 RETURN -> returns mem[0..calldatasize]
+
+        vm.etch(target, bytecode);
+
+        (bool success, bytes memory result) = target.call(bytes("hello PUSH0"));
+        assertTrue(success);
+        assertEq(string(result), "hello PUSH0");
+    }
+}