take_promise

Async IO capture for Gleam tests on JavaScript. Like take, but accepts callbacks that return Promise(a) and awaits them before returning captured output.

Usage

gleam add --dev take_promise@1

import gleam/javascript/promise
import take_promise

pub fn async_greeting_test() {
  use #(result, output) <- promise.await(
    take_promise.with_stdout(fn() {
      io.println("Hello, world!")
      promise.resolve(42)
    }),
  )

  assert 42 == result
  assert "Hello, world!\n" == output
  promise.resolve(Nil)
}

Semantic Versioning

Take Promise follows Semantic Versioning 2.0.