import { fromPromise, PromiseMapper } from "./frompromise"
import { expectPropertyEvents } from "./test-utils"

describe("fromPromise", function () {
  describe("Default", function () {
    describe("on success", () =>
      expectPropertyEvents(
        () =>
          fromPromise(
            new Promise(function (res, rej) {
              res("ok")
            }) as any
          ),
        [{ state: "resolved", value: "ok" }]
      ))
    describe("on error", () =>
      expectPropertyEvents(
        () =>
          fromPromise(
            new Promise(function (res, rej) {
              rej("fail")
            }) as any
          ),
        [{ state: "rejected", error: "fail" }]
      ))
  })

  describe("Custom mapper", function () {
    const mapper = [
      () => "init",
      (value) => value,
      (error) => error.toString(),
    ] as PromiseMapper<string, string>

    describe("on success", () =>
      expectPropertyEvents(() => {
        const p = fromPromise(
          new Promise(function (res, rej) {
            res("ok")
          }) as any,
          ...mapper
        )
        return p
      }, ["ok"]))
    describe("on error", () =>
      expectPropertyEvents(
        () =>
          fromPromise(
            new Promise(function (res, rej) {
              rej("fail")
            }) as any,
            ...mapper
          ),
        ["fail"]
      ))
  })
})