src/ez/gate.bend source

src/ez/gate.bend on the hub · documented module

# ez/gate: what a test file says its run must print. A test states that in a# `#|` trailer, one line for each line of output, and `ez test` holds the run# to it.## This file imports nothing but Base, so a law about the trailer walk costs a# compile of that and no more.import Base# a trailer line kept, with its `#|` dropped, or a source line ignoreddef want.put(is_want: Bool, line: String, rest: List<&2, String>) -> List<&2, String>:  match is_want:    case True{}:      String.drop(line, 2n) <> rest    case False{}:      rest# the `#|` lines of a source file, in orderdef want(ls: List<&2, String>) -> List<&2, String>:  match ls:    case []:      []    case +h <> t:      want.put(String.starts_with(h, "#|"), h, want(t))# what a test file says its run must printdef trailer(text: String) -> String:  String.join(want(String.lines(text)), "\n")