Running Tests

To run tests with snforge, simply run the snforge test command from the package directory.

$ snforge test
Output: 
Collected 3 test(s) from hello_snforge package
Running 0 test(s) from src/
Running 3 test(s) from tests/
[PASS] hello_snforge_integrationtest::test_contract::test_calling (gas: ~1)
[PASS] hello_snforge_integrationtest::test_contract::test_executing (gas: ~1)
[PASS] hello_snforge_integrationtest::test_contract::test_calling_another (gas: ~1)
Tests: 3 passed, 0 failed, 0 skipped, 0 ignored, 0 filtered out

Filtering Tests

You can pass a filter string after the snforge test command to filter tests. By default, any test with an absolute module tree path matching the filter will be run.

$ snforge test calling
Output: 
Collected 2 test(s) from hello_snforge package
Running 0 test(s) from src/
Running 2 test(s) from tests/
[PASS] hello_snforge_integrationtest::test_contract::test_calling_another (gas: ~1)
[PASS] hello_snforge_integrationtest::test_contract::test_calling (gas: ~1)
Tests: 2 passed, 0 failed, 0 skipped, 0 ignored, 1 filtered out

Running a Specific Test

To run a specific test, you can pass a filter string along with an --exact flag. Note, you have to use a fully qualified test name, including a module name.

📝 Note

Running a specific test results in optimized compilation. snforge will try to compile only the desired test, unlike the case of running all tests where all of them are compiled.

$ snforge test hello_snforge_integrationtest::test_contract::test_calling --exact
Output: 
Collected 1 test(s) from hello_snforge package
Running 1 test(s) from tests/
[PASS] hello_snforge_integrationtest::test_contract::test_calling (gas: ~1)
Running 0 test(s) from src/
Tests: 1 passed, 0 failed, 0 skipped, 0 ignored, other filtered out

Stopping Test Execution After First Failed Test

To stop the test execution after first failed test, you can pass an --exit-first flag along with snforge test command.

$ snforge test --exit-first
Output: 
Collected 3 test(s) from failing_example package
Running 3 test(s) from tests/
[FAIL] failing_example_tests::test_failing

Failure data:
    0x6661696c696e6720636865636b ('failing check')


Failures:
    failing_example_tests::test_failing

Tests: 0 passed, 1 failed, 2 skipped, 0 ignored, 0 filtered out

Displaying Resources Used During Tests

To track resources like builtins / syscalls that are used when running tests, use snforge test --detailed-resources.

$ snforge test --detailed-resources
Output: 
Collected 2 test(s) from hello_starknet package
Running 2 test(s) from tests/
[PASS] hello_starknet_integrationtest::test_contract::test_cannot_increase_balance_with_zero_value (gas: ~105)
        steps: 3405
        memory holes: 22
        builtins: (range_check: 77, pedersen: 7)
        syscalls: (CallContract: 2, StorageRead: 1, Deploy: 1)
        
[PASS] hello_starknet_integrationtest::test_contract::test_increase_balance (gas: ~172)
        steps: 4535
        memory holes: 15
        builtins: (range_check: 95, pedersen: 7)
        syscalls: (CallContract: 3, StorageRead: 3, Deploy: 1, StorageWrite: 1)
        
Running 0 test(s) from src/
Tests: 2 passed, 0 failed, 0 skipped, 0 ignored, 0 filtered out

For more information about how starknet-foundry calculates those, see gas and resource estimation section.