Make an assertion, error will be thrown if expr does not have truthy value.

Make an assertion that actual and expected are equal, deeply. If not deeply equal, then throw.

Executes a function, expecting it to throw. If it does not, then it throws. An error class and a string that should be included in the error message can also be asserted.

Converts given base64 encoded data back to original

DecodeString returns the bytes represented by the hexadecimal string s. DecodeString expects that src contains only hexadecimal characters and that src has even length. If the input is malformed, DecodeString will throw an error.