test: add deployed code test

testdata/cheats/Cheats.sol

@@ -99,8 +99,10 @@ interface Cheats {
     function expectCall(address, bytes calldata) external;
     // Expect a call to an address with the specified msg.value and calldata
     function expectCall(address, uint256, bytes calldata) external;
-    // Gets the code from an artifact file. Takes in the relative path to the json file
+    // Gets the bytecode from an artifact file. Takes in the relative path to the json file
     function getCode(string calldata) external returns (bytes memory);
+    // Gets the _deployed_ bytecode from an artifact file. Takes in the relative path to the json file
+    function getDeployedCode(string calldata) external returns (bytes memory);
     // Labels an address in call traces
     function label(address, string calldata) external;
     // If the condition is false, discard this run's fuzz inputs and generate new ones

testdata/cheats/GetDeployedCode.t.sol

@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: Unlicense
+pragma solidity >=0.8.0;
+
+import "ds-test/test.sol";
+import "./Cheats.sol";
+
+contract GetDeployedCodeTest is DSTest {
+    Cheats constant vm = Cheats(HEVM_ADDRESS);
+
+    address public constant overrideAddress = 0x0000000000000000000000000000000000000064;
+
+    event Payload(address sender, address target, bytes data);
+
+    function testGetCode() public {
+        bytes memory fullPath = vm.getDeployedCode("../testdata/fixtures/GetCode/Override.json");
+        string memory expected = string(
+            bytes(
+                hex"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"
+            )
+        );
+        assertEq(string(fullPath), expected, "deployed code for full path was incorrect");
+    }
+
+    // this will set the deployed bytecode of the stateless contract to the `overrideAddress` and call the function that emits an event that will be `expectEmitted`
+    function testCanEtchStatelessOverride() public {
+        bytes memory code = vm.getDeployedCode("../testdata/fixtures/GetCode/Override.json");
+        vm.etch(overrideAddress, code);
+        assertEq(
+            overrideAddress.code,
+            hex"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"
+        );
+
+        Override over = Override(overrideAddress);
+
+        vm.expectEmit(true, false, false, true);
+        over.emitPayload(address(0), "hello");
+        emit Payload(address(this), address(0), "hello");
+    }
+}
+
+interface Override {
+    function emitPayload(address target, bytes calldata message) external payable returns (uint256);
+}

testdata/fixtures/GetCode/Override.json

@@ -0,0 +1,12 @@
+{
+  "bytecode": {
+    "object": "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",
+    "sourceMap": "65:263:0:-:0;;;;;;;;;;;;;;;;;;;",
+    "linkReferences": {}
+  },
+  "deployedBytecode": {
+    "object": "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",
+    "sourceMap": "65:263:0:-:0;;;;;;;;;;;;;;;;;;;;;154:172;;;;;;:::i;:::-;;:::i;:::-;;;930:25:1;;;918:2;903:18;154:172:0;;;;;;;;241:7;265:36;273:10;285:6;293:7;;265:36;;;;;;;;;:::i;:::-;;;;;;;;-1:-1:-1;318:1:0;154:172;;;;;:::o;14:765:1:-;93:6;101;109;162:2;150:9;141:7;137:23;133:32;130:52;;;178:1;175;168:12;130:52;204:23;;-1:-1:-1;;;;;256:31:1;;246:42;;236:70;;302:1;299;292:12;236:70;325:5;-1:-1:-1;381:2:1;366:18;;353:32;404:18;434:14;;;431:34;;;461:1;458;451:12;431:34;499:6;488:9;484:22;474:32;;544:7;537:4;533:2;529:13;525:27;515:55;;566:1;563;556:12;515:55;606:2;593:16;632:2;624:6;621:14;618:34;;;648:1;645;638:12;618:34;693:7;688:2;679:6;675:2;671:15;667:24;664:37;661:57;;;714:1;711;704:12;661:57;745:2;741;737:11;727:21;;767:6;757:16;;;;;14:765;;;;;:::o;966:589::-;-1:-1:-1;;;;;1217:15:1;;;1199:34;;1269:15;;1264:2;1249:18;;1242:43;1321:2;1316;1301:18;;1294:30;;;1340:18;;1333:34;;;1142:4;1360:6;1410;1404:3;1389:19;;1376:49;1475:1;1469:3;1460:6;1449:9;1445:22;1441:32;1434:43;1545:3;1538:2;1534:7;1529:2;1521:6;1517:15;1513:29;1502:9;1498:45;1494:55;1486:63;;966:589;;;;;;;:::o",
+    "linkReferences": {}
+  }
+}

testdata/fixtures/GetCode/Override.sol

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.13;
+
+contract Override {
+    event Payload(address sender, address target, bytes data);
+
+    function emitPayload(address target, bytes calldata message) external payable returns (uint256) {
+        emit Payload(msg.sender, target, message);
+        return 0;
+    }
+}