Utilities to build objects from the
repr crate for unit testing.
These test utilities are relied by crates other than
Convert a Datum to a String such that test_spec_to_row can convert the String back into a row containing the same Datum.
If the stream starts with a sequence of tokens that can be parsed as a datum, return those tokens as one string.
scalar_type_stream or infers it from
Parse a token as a vec of strings that can be parsed as datums in a row.
Row from a sequence of