import { describe, expect, it } from 'vitest'
import { niceTicks } from './scale'

describe('niceTicks', () => {
  it('produces round steps that cover the maximum', () => {
    expect(niceTicks(7)).toEqual([0, 2, 4, 6, 8])
    expect(niceTicks(23)).toEqual([0, 10, 20, 30])
    expect(niceTicks(1.3)).toEqual([0, 0.5, 1, 1.5])
    expect(niceTicks(0)).toEqual([0, 1])
  })
})