forge test

NAME

forge-test - Run the project's tests.

SYNOPSIS

forge test [options]

DESCRIPTION

Run the project's tests.

Forking

It is possible to run the tests in a forked environment by passing --fork-url <URL>.

When the tests are running in a forked environment, you can access all the state of the forked chain as you would if you had deployed the contracts. Cheatcodes are still available.

You can also specify a block number to fork from by passing --fork-block-number <BLOCK>. When forking from a specific block, the chain data is cached to ~/.foundry/cache. If you do not want to cache the chain data, pass --no-storage-caching.

Traces that cannot be decoded by local contracts when running in a forked environment (e.g. calls to contracts that live on mainnet, like tokens) can optionally be decoded using Etherscan. To use Etherscan for trace decoding, set ETHERSCAN_API_KEY or pass --etherscan-api-key <KEY>.

Debugging

It is possible to run a test in an interactive debugger. To start the debugger, pass --debug <TEST>.

If multiple tests match the specified pattern, you must use other test filters in order to reduce the matching number of tests to exactly 1.

If the test is a unit test, it is immediately opened in the debugger.

If the test is a fuzz test, the fuzz test is run and the debugger is opened on the first failing scenario. If there are no failing scenarios for the fuzz test, the debugger is opened on the last scenario.

More information on the debugger can be found in the debugger chapter.

Gas reports

You can generate a gas report by passing --gas-report.

More information on gas reports can be found in the gas reports chapter.

List

It is possible to list the tests without running them. You can pass --json to make it easier for outside extensions to parse structured content.

OPTIONS

Test Options

-m regex
--match regex
    Only run test functions matching the specified regex pattern.
    Deprecated: See --match-test.

--match-test regex
    Only run test functions matching the specified regex pattern.

--no-match-test regex
    Only run test functions that do not match the specified regex pattern.

--match-contract regex
    Only run tests in contracts matching the specified regex pattern.

--no-match-contract regex
    Only run tests in contracts that do not match the specified regex pattern.

--match-path glob
    Only run tests in source files matching the specified glob pattern.

--no-match-path glob
    Only run tests in source files that do not match the specified glob pattern.

--debug regex
    Run a test in the debugger.

    The argument passed to this flag is the name of the test function you want to run, and it works the same as --match-test.

    If more than one test matches your specified criteria, you must add additional filters until only one test is found (see --match-contract and --match-path).

    The matching test will be opened in the debugger regardless of the outcome of the test.

    If the matching test is a fuzz test, then it will open the debugger on the first failure case. If the fuzz test does not fail, it will open the debugger on the last fuzz case.

    For more fine-grained control of which fuzz case is run, see forge debug.

--gas-report
    Print a gas report.

--allow-failure
    Exit with code 0 even if a test fails.

--etherscan-api-key key
    Etherscan API key. If set, traces are decoded using Etherscan if --fork-url is also set.
    Environment: ETHERSCAN_API_KEY

EVM Options

-f url
--rpc-url url
--fork-url url
    Fetch state over a remote endpoint instead of starting from an empty state.

    If you want to fetch state from a specific block number, see --fork-block-number.

--fork-block-number block
    Fetch state from a specific block number over a remote endpoint. See --fork-url.

--fork-retry-backoff <BACKOFF>
     Initial retry backoff on encountering errors.

--no-storage-caching
    Explicitly disables the use of RPC caching.

    All storage slots are read entirely from the endpoint. See --fork-url.

-v
--verbosity
    Verbosity of the EVM.

    Pass multiple times to increase the verbosity (e.g. -v, -vv, -vvv).

    Verbosity levels:
    - 2: Print logs for all tests
    - 3: Print execution traces for failing tests
    - 4: Print execution traces for all tests, and setup traces for failing tests
    - 5: Print execution and setup traces for all tests

--sender address
    The address which will be executing tests

--initial-balance balance
    The initial balance of deployed contracts

--ffi
    Enables the FFI cheatcode

Executor Options

--base-fee <FEE>
--block-base-fee-per-gas <FEE>
    The base fee in a block (in wei).

--block-coinbase address
    The coinbase of the block.

--block-difficulty difficulty
    The block difficulty.

--block-gas-limit gas_limit
    The block gas limit.

--block-number block
    The block number.

--block-timestamp timestamp
    The timestamp of the block (in seconds).

--chain-id chain_id
    The chain ID.

--gas-limit gas_limit
    The block gas limit.

--gas-price gas_price
    The gas price (in wei).

--tx-origin address
    The transaction origin.

Cache Options

--force
    Clear the cache and artifacts folder and recompile.

Linker Options

--libraries libraries
    Set pre-linked libraries.

    The parameter must be in the format <remapped path to lib>:<library name>:<address>, e.g. src/Contract.sol:Library:0x....

    Can also be set in your configuration file as libraries = ["<path>:<lib name>:<address>"].

Compiler Options

--optimize
    Activate the Solidity optimizer.

--optimizer-runs runs
    The number of optimizer runs.

--via-ir
    Use the Yul intermediate representation compilation pipeline.

--revert-strings
    How to treat revert and require reason strings.

--use solc_version
    Specify the solc version, or a path to a local solc, to build with.

    Valid values are in the format x.y.z, solc:x.y.z or path/to/solc.

--offline
    Do not access the network. Missing solc versions will not be installed.

--no-auto-detect
    Do not auto-detect solc.

--ignored-error-codes error_codes
    Ignore solc warnings by error code. The parameter is a comma-separated list of error codes.

--extra-output selector
    Extra output to include in the contract's artifact.

    Example keys: abi, storageLayout, evm.assembly, ewasm, ir, ir-optimized, metadata.

    For a full description, see the Solidity docs.

--extra-output-files selector
    Extra output to write to separate files.

    Example keys: abi, storageLayout, evm.assembly, ewasm, ir, ir-optimized, metadata.

    For a full description, see the Solidity docs.

--evm-version version
    The target EVM version.

Project Options

--build-info
    Generate build info files.

--build-info-path path
    Output path to directory that build info files will be written to.

--root path
    The project's root path. By default, this is the root directory of the current git repository, or the current working directory.

-c path
--contracts path
    The contracts source directory.
    Environment: DAPP_SRC

--lib-paths path
    The path to the library folder.

-r remappings
--remappings remappings
    The project's remappings.

    The parameter is a comma-separated list of remappings in the format <source>=<dest>.

--cache-path path
    The path to the compiler cache.

--config-path file
    Path to the config file.

--hh
--hardhat
    This is a convenience flag, and is the same as passing --contracts contracts --lib-paths node-modules.

-o path
--out path
    The project's artifacts directory.

--silent
    Suppress all output.

Watch Options

-w [path...]
--watch [path...]
    Watch specific file(s) or folder(s).

    By default, the project's source directory is watched.

-d delay
--delay delay
    File update debounce delay.

    During the delay, incoming change events are accumulated and only once the delay has passed, is an action taken.
    Note that this does not mean a command will be started: if --no-restart is given and a command is already.     running, the outcome of the action will be to do nothing.

    Defaults to 50ms. Parses as decimal seconds by default, but using an itneger with the ms suffix may be more convenient.

    When using --poll mode, you'll want a larger duration, or risk overloading disk I/O.

--no-restart
    Do not restart the command while it's running.

--run-all
    Explicitly re-run the command on all files when a change is made.

Display Options

-j
--json
     Print the deployment information as JSON.

--list
    List tests instead of running them.

Common Options

-h
--help
    Prints help information.

EXAMPLES

  1. Run the tests:

    forge test
    
  2. Open a test in the debugger:

    forge test --debug testSomething
    
  3. Generate a gas report:

    forge test --gas-report
    
  4. Only run tests in test/Contract.t.sol in the BigTest contract that start with testFail:

    forge test --match-path test/Contract.t.sol --match-contract BigTest \
      --match-test "testFail*"
    
  5. List tests in desired format

    forge test --list
    forge test --list --json
    forge test --list --json --match-test "testFail*" | tail -n 1 | json_pp
    

SEE ALSO

forge, forge build, forge snapshot