Skip to content

test_tload_after_tstore_is_zero()

Documentation for tests/cancun/eip1153_tstore/test_tstorage.py::test_tload_after_tstore_is_zero@343274cc.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/cancun/eip1153_tstore/test_tstorage.py::test_tload_after_tstore_is_zero --fork Amsterdam

Test that tload returns zero after tstore is called with zero.

Based on [ethereum/tests/.../03_tloadAfterStoreIs0Filler.yml] (https://github.com/ethereum/tests/blob/ 9b00b68/src/ EIPTestsFiller/StateTests/ stEIP1153-transientStorage/03_tloadAfterStoreIs0Filler.yml)",

Source code in tests/cancun/eip1153_tstore/test_tstorage.py 
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
def test_tload_after_tstore_is_zero(
    state_test: StateTestFiller, pre: Alloc
) -> None:
    """
    Test that tload returns zero after tstore is called with zero.

    Based on [ethereum/tests/.../03_tloadAfterStoreIs0Filler.yml]
    (https://github.com/ethereum/tests/blob/
    9b00b68593f5869eb51a6659e1cc983e875e616b/src/
    EIPTestsFiller/StateTests/
    stEIP1153-transientStorage/03_tloadAfterStoreIs0Filler.yml)",
    """
    slots_to_write = [1, 4, 2**128, 2**256 - 2]
    slots_to_read = [slot - 1 for slot in slots_to_write] + [
        slot + 1 for slot in slots_to_write
    ]
    assert set.intersection(set(slots_to_write), set(slots_to_read)) == set()

    code = sum(Op.TSTORE(slot, 1234) for slot in slots_to_write) + sum(
        Op.SSTORE(slot, Op.TLOAD(slot)) for slot in slots_to_read
    )

    code_address = pre.deploy_contract(
        code=code,  # type: ignore
        storage=dict.fromkeys(slots_to_write + slots_to_read, 0xFFFF),
    )

    tx = Transaction(sender=pre.fund_eoa(), to=code_address)

    post = {
        code_address: Account(
            storage=dict.fromkeys(slots_to_read, 0)
            | dict.fromkeys(slots_to_write, 0xFFFF)
        )
    }

    state_test(pre=pre, post=post, tx=tx)

Parametrized Test Cases

This test generates 1 parametrized test case across 4 forks.