2 commits: lowLevelError + testExpectEncodeStg (#21)

* feat(stdError): add `lowLevelError`

* test(stdError): add `testExpectEncodeStg`

Author: ZeroEkkusu

src/stdlib.sol

@@ -109,6 +109,7 @@ library stdError {
     bytes public constant indexOOBError = abi.encodeWithSignature("Panic(uint256)", 0x32);
     bytes public constant memOverflowError = abi.encodeWithSignature("Panic(uint256)", 0x41);
     bytes public constant zeroVarError = abi.encodeWithSignature("Panic(uint256)", 0x51);
+    bytes public constant lowLevelError = bytes(""); // `0x`
 }
 
 struct StdStorage {

src/test/StdError.t.sol

@@ -38,6 +38,11 @@ contract StdErrorsTest is DSTest {
         test.enumConversion(1);
     }
 
+    function testExpectEncodeStg() public {
+        vm.expectRevert(stdError.encodeStorageError);
+        test.encodeStgError();
+    }
+
     function testExpectPop() public {
         vm.expectRevert(stdError.popError);
         test.pop();
@@ -58,6 +63,11 @@ contract StdErrorsTest is DSTest {
         test.intern();
     }
 
+    function testExpectLowLvl() public {
+        vm.expectRevert(stdError.lowLevelError);
+        test.someArr(0);
+    }
+
     // TODO: figure out how to trigger encodeStorageError?
 }
 
@@ -66,7 +76,8 @@ contract ErrorsTest {
         T1
     }
 
-    uint256[] someArr;
+    uint256[] public someArr;
+    bytes someBytes;
 
     function assertionError() public pure {
         assert(false);
@@ -88,6 +99,13 @@ contract ErrorsTest {
         T(a);
     }
 
+    function encodeStgError() public {
+        assembly {
+            sstore(someBytes.slot, 1)
+        }
+        bytes memory b = someBytes;
+    }
+
     function pop() public {
         someArr.pop();
     }