string.inspect should print non-byte bit strings with Gleam syntax

[lpil]

     Values were not equal
     expected: "<<251, 3:size(3)>>"
          got: "//erl(<<251,3:3>>)"

[inoas]

Is this the syntax for non byte aligned bit strings? I am not sure how to detect this or what to detect (too little experience with erlang/elixir binary syntax)

[lpil]

We'd need to swap is_binary for is_bitstring here, and change the logic slightly to be able to print non-byte aligned bit strings.

https://github.com/gleam-lang/stdlib/blob/a5519c33086b3467039dd6d7178da95630d1a68b/src/gleam_stdlib.erl#L384

[markholmes]

How would I reproduce this?

[lpil]

You could call string.inspect on <<251, 3:size(3)>>

[inoas-nbw]

Is this the correct test?

@target(erlang)
pub fn inspect_erlang_non_byte_aligned_bit_string() {
  <<251, 3:size(3)>>
  |> string.inspect
  |> should.equal("<<251, 3:size(3)>>")
}

... because this already passes for me on gleam 0.30.5 and otp 26

[lpil]

Yes that looks right. How did I get that string then? 🤔

Let's add that test to the repo to be sure.

[inoas]

the test function above misses the test suffix. the error is as you described.

what about js?

gleam/string_test.inspect_erlang_non_byte_aligned_bit_string_test: Needs to be a byte size3

[lpil]

It's not supported on JS currently so can't test there.