new(tests): EOF - EIP-7620: EOFCREATE referencing the same subcontainer twice (#809)

* tests/prague/eof/eof_create: added test EOFCreate referencing the same subcontainer twice

* add returncontract case

Signed-off-by: Danno Ferrin <[email protected]>

* fix comments and further specialize

Signed-off-by: Danno Ferrin <[email protected]>

---------

Signed-off-by: Danno Ferrin <[email protected]>
Co-authored-by: Danno Ferrin <[email protected]>

Author: MariusVanDerWijden

tests/prague/eip7692_eof_v1/eip7620_eof_create/test_subcontainer_validation.py

@@ -464,6 +464,39 @@ def test_container_both_kinds_different_sub(eof_test: EOFTestFiller):
     )
 
 
+def test_container_multiple_eofcreate_references(eof_test: EOFTestFiller):
+    """Test multiple references to the same subcontainer from an EOFCREATE operation"""
+    eof_test(
+        data=Container(
+            sections=[
+                Section.Code(
+                    code=Op.EOFCREATE[0](0, 0, 0, 0) + Op.EOFCREATE[0](0, 0, 0, 0) + Op.STOP,
+                ),
+                returncontract_sub_container,
+            ],
+        ),
+    )
+
+
+def test_container_multiple_returncontract_references(eof_test: EOFTestFiller):
+    """Test multiple references to the same subcontainer from a RETURNCONTACT operation"""
+    eof_test(
+        data=Container(
+            sections=[
+                Section.Code(
+                    code=Op.PUSH0
+                    + Op.CALLDATALOAD
+                    + Op.RJUMPI[6]
+                    + Op.RETURNCONTRACT[0](0, 0)
+                    + Op.RETURNCONTRACT[0](0, 0)
+                ),
+                stop_sub_container,
+            ],
+            kind=ContainerKind.INITCODE,
+        ),
+    )
+
+
 @pytest.mark.parametrize("version", [0, 255], ids=lambda x: x)
 def test_subcontainer_wrong_eof_version(
     eof_test: EOFTestFiller,