ReactTestUtils.actAsync returned promise can't be used more than once

[TristanCacqueray]

It seems like the actAsync Promise is broken and it results in undefined error when used twice, for example:

actAsync(_ => () |> resolve) |> then_(_ => () |> resolve)  |> then_(_ => () |> resolve)

yield this error: TypeError: Cannot read property 'then' of undefined

More details in: glennsl/rescript-jest#77

[bloodyowl]

The actAsync function in React doesn't return an actual promise, I think you can fix that by doing:

@bs.val external toActualPromise: Js.Promise.t<'a> => Js.Promise.t<'a> = "Promise.resolve";

toActualPromise(actAsync(...))

[TristanCacqueray]

Thank you for the feedback, this solution works. Shouldn't it be the default so that actAsync can be used directly with Jest.testPromise ?

[davesnx]

React.act / React.actAsync is now the preferred way to run stateful operations in testing.

act: (unit => unit) => Js.Promise.t(unit)
actAsync: (unit => Js.Promise.t(unit)) => Js.Promise.t(unit)

Those shouldn't have this issue