data-fns/src/lib/generateSequence.test.ts

This library provides utility functions for working with array data that are useful in many contexts, including creative coding. It offers generic functions that perform common operations such as offsetting an array, generating an array based on a callbac

import { generateSequence } from './generateSequence'

describe('generateSequence', () => {
  it('should generate a sequence of values by applying a function for a specified number of iterations', () => {
    const result = generateSequence(5, 1, (value) => value * 2)
    expect(result).toEqual([1, 2, 4, 8, 16])
  })

  it('should handle an iteration count of 0', () => {
    const result = generateSequence(0, 1, (value) => value * 2)
    expect(result).toEqual([])
  })

  it('should handle an iteration count of 1', () => {
    const result = generateSequence(1, 1, (value) => value * 2)
    expect(result).toEqual([1])
  })

  it('should throw an error if the number of iterations is negative', () => {
    expect(() => generateSequence(-1, 1, (value) => value * 2)).toThrow(
      'Iterations must be a positive number'
    )
  })
})