Direct Tests Agent Skill

pytest tests/direct/ -v
pytest tests/direct/test_specific.py -v
pytest tests/direct/test_specific.py::test_one_case -v

def test_example(direct_vm, direct_deploy, direct_alice, direct_bob):
    # direct_vm      — VMContext with cheatcodes
    # direct_deploy  — deploy a contract file
    # direct_alice   — test address
    # direct_bob     — test address
    pass

def test_set_and_get(direct_vm, direct_deploy, direct_alice):
    contract = direct_deploy("contracts/my_contract.py")
    direct_vm.sender = direct_alice

    contract.set_data("hello")

    result = contract.get_data(direct_alice)
    assert result == "hello"

import json

def test_with_web_mock(direct_vm, direct_deploy, direct_alice):
    contract = direct_deploy("contracts/my_contract.py")
    direct_vm.sender = direct_alice

    # Pattern: regex matching on URL
    direct_vm.mock_web(
        r".*api\.example\.com/prices.*",
        {"status": 200, "body": '{"price": 42.5}'},
    )

    contract.update_price("ETH/USD")
    assert contract.get_price("ETH/USD") == 42.5

direct_vm.mock_web(
    r"api\.example\.com/data",
    {
        "response": {
            "status": 200,
            "headers": {},
            "body": json.dumps({"key": "value"}).encode()
        },
        "method": "GET"
    }
)

direct_vm.mock_llm(
    r".*Extract the match result.*",  # Regex on prompt text
    json.dumps({"score": "2:1", "winner": 1}),
)

direct_vm.clear_mocks()  # Reset between test scenarios

# Set transaction sender
direct_vm.sender = direct_alice

# Set native value (wei)
direct_vm.value = 1000000000000000000  # 1 ETH

# Expect a revert
with direct_vm.expect_revert("Insufficient balance"):
    contract.withdraw(1000)

# Temporary sender change
with direct_vm.prank(direct_bob):
    contract.method()  # Called as bob

# Snapshot and restore state
snap_id = direct_vm.snapshot()
contract.modify_state()
direct_vm.revert(snap_id)  # State restored

# Set account balance
direct_vm.deal(direct_alice, 1000000000000000000)

# Time travel
direct_vm.warp("2024-06-01T12:00:00Z")

tests/direct/
├── conftest.py           # Shared fixtures and mock helpers
├── test_<feature>.py     # Tests per feature/method
└── test_<feature>_web.py # Tests requiring web/LLM mocks

def test_only_owner(direct_vm, direct_deploy, direct_alice, direct_bob):
    contract = direct_deploy("contracts/my_contract.py")

    direct_vm.sender = direct_alice
    contract.create_item("item_1")

    direct_vm.sender = direct_bob
    with direct_vm.expect_revert("Only owner"):
        contract.delete_item("item_1")

def test_state_flow(direct_vm, direct_deploy, direct_alice):
    contract = direct_deploy("contracts/my_contract.py")
    direct_vm.sender = direct_alice

    contract.create_item("item_1")
    assert contract.get_item("item_1")["status"] == "pending"

    contract.approve_item("item_1")
    assert contract.get_item("item_1")["status"] == "approved"

import json

def mock_price_api(direct_vm, pair: str, price: float):
    """Mock a price API response."""
    direct_vm.mock_web(
        rf".*api\.example\.com/prices/{pair}.*",
        {"status": 200, "body": json.dumps({"price": price})},
    )