import * as assert from "assert"
import * as Automerge from "../src"

const uuid = Automerge.uuid

describe("uuid", () => {
  afterEach(() => {
    uuid.reset()
  })

  describe("default implementation", () => {
    it("generates unique values", () => {
      assert.notEqual(uuid(), uuid())
    })
  })

  describe("custom implementation", () => {
    let counter

    function customUuid() {
      return `custom-uuid-${counter++}`
    }

    before(() => uuid.setFactory(customUuid))
    beforeEach(() => (counter = 0))

    it("invokes the custom factory", () => {
      assert.equal(uuid(), "custom-uuid-0")
      assert.equal(uuid(), "custom-uuid-1")
    })
  })
})