import * as B from "."
import { isEventStream, isEventStreamSeed } from "./abstractions"

describe("Atom", () => {
  describe("Basics", () => {
    it("Uses inheritance", () => {
      expect(B.isAtom(B.atom(1))).toEqual(true)
      expect(B.isProperty(B.atom(1))).toEqual(true)
      expect(B.isAtomSeed(B.atom(1))).toEqual(true)
      expect(B.isPropertySeed(B.atom(1))).toEqual(true)
      expect(B.isPropertySource(B.atom(1))).toEqual(true)
      expect(B.isAtomSource(B.atom(1))).toEqual(true)
      expect(isEventStream(B.constant(1))).toEqual(false)
      expect(isEventStreamSeed(B.constant(1))).toEqual(false)
    })

    it("Dispatches values", () => {
      const a = B.atom(1)
      let value: any = null
      a.forEach((v) => (value = v))
      expect(value).toEqual(1)
      a.set(2)
      expect(value).toEqual(2)
    })
  })
})

describe("Dependent Atom", () => {
  it("Works", () => {
    var b = B.bus()
    var prop = B.toProperty("1", B.globalScope)(b)
    var atom = B.atom(prop, (newValue) => b.push(newValue))
    expect(atom.get()).toEqual("1")
    atom.set("2")
    expect(atom.get()).toEqual("2")
  })
})