feat(tests): extend Op with Op.OOG fake opcode

src/ethereum_test_tools/vm/opcode.py

@@ -24,6 +24,12 @@ def _get_int_size(n: int) -> int:
 
 _push_opcodes_byte_list = [bytes([0x5F + x]) for x in range(33)]
 
+class Special_Codes(Enum):
+    """
+    """
+    NAN = 0,
+    OOG = 1,
+
 
 class Opcode(bytes):
     """
@@ -43,6 +49,7 @@ class Opcode(bytes):
     pushed_stack_items: int
     min_stack_height: int
     data_portion_length: int
+    special_code: Special_Codes
     _name_: str
 
     def __new__(
@@ -53,6 +60,7 @@ def __new__(
         pushed_stack_items: int = 0,
         min_stack_height: int = 0,
         data_portion_length: int = 0,
+        special_code: Special_Codes = Special_Codes.NAN,
     ):
         """
         Creates a new opcode instance.
@@ -67,6 +75,7 @@ def __new__(
             obj.pushed_stack_items = pushed_stack_items
             obj.min_stack_height = min_stack_height
             obj.data_portion_length = data_portion_length
+            obj.special_code = special_code
             return obj
 
     def __call__(self, *args_t: Union[int, bytes, str, "Opcode", FixedSizeBytes]) -> bytes:
@@ -107,6 +116,12 @@ def __call__(self, *args_t: Union[int, bytes, str, "Opcode", FixedSizeBytes]) ->
         pre_opcode_bytecode = bytes()
         data_portion = bytes()
 
+        if self.special_code == Special_Codes.OOG:
+            # This operation will result in gasprice = 19073514453125027
+            # Add a little more and geth report gasprice = 30 with oog exception
+            # Make it 0 - 1 and geth report gasprice > u64 error
+            return Opcodes.SHA3(0, 100000000000)
+
         if self.data_portion_length > 0:
             # For opcodes with a data portion, the first argument is the data
             # and the rest of the arguments form the stack.
@@ -188,6 +203,13 @@ def __str__(self) -> str:
         """
         return self._name_
 
+    def __eq__(self, other):
+        """
+        Required to differentiate between SELFDESTRUCT and SENDALL type of cases
+        """
+        if not isinstance(other, Opcode):
+            return NotImplemented
+        return (self._name_ == other._name_)
 
 OpcodeCallArg = Union[int, bytes, Opcode]
 
@@ -373,3 +395,4 @@ class Opcodes(Opcode, Enum):
 
     SELFDESTRUCT = Opcode(0xFF, popped_stack_items=1)
     SENDALL = Opcode(0xFF, popped_stack_items=1)
+    OOG = Opcode(0xFF, popped_stack_items=2, special_code=Special_Codes.OOG)