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Discussion on: RxJS 7 is released 🎉

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Replies for: I don't understand the toPromise deprecation. You can't convert an observable to a promise? It was helpful for unit tests

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vazsonyidl profile image
vazsonyidl •

It depends on your test setup, without any other info it is hard to reply. :( Maybe you could give a try for lastValueFrom instead of toPromise as it is planned to replace that one-in-one.

Or if your setup was something like this one :

    this.items = await this.itemService
      .getItems()
      .toPromise()
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Now you can use this instead:

    const items$ = this.itemService.getItems();
    this.items = await lastValueFrom(items$);
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I hope I can help you, but reply if do not. :)

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lyrod profile image
Lyrod • • Edited

This is exactly what I do in my tests! Thanks!