Jest

describe :: String -> Effect Unit -> Effect Unit

describeOnly :: String -> Effect Unit -> Effect Unit

describeSkip :: String -> Effect Unit -> Effect Unit

test :: String -> Effect Unit -> Effect Unit

testOnly :: String -> Effect Unit -> Effect Unit

testSkip :: String -> Effect Unit -> Effect Unit

expectToEqual :: forall a. Eq a => a -> a -> Effect Unit

expectToNotEqual :: forall a. Eq a => a -> a -> Effect Unit

expectToBeClose :: Number -> Number -> Effect Unit

https://jestjs.io/docs/en/expect#tobeclosetonumber-numdigits

expectToBeTrue :: Boolean -> Effect Unit

expectToBeFalse :: Boolean -> Effect Unit