file-commons/src/dataUriToBlob.test.ts

import * as fc from 'fast-check'
import dataUriToBlob from './dataUriToBlob'

it('should exist', () => {
  expect(dataUriToBlob).toBeDefined()
})

it('should be a callable', () => {
  expect(typeof dataUriToBlob).toBe('function')
})

it('should accept 2 arguments', () => {
  expect(dataUriToBlob).toHaveLength(2)
})

it('should throw an error for invalid parameters', () => {
  fc.assert(
    fc.property(
      fc.anything().filter(s => typeof s !== 'string'),
      s => {
        expect(() => dataUriToBlob(s as string)).toThrow(TypeError)
      }
    )
  )
})

it('should return a Blob for valid parameters', () => {
  fc.assert(
    fc.property(fc.base64String(), binaryBase64 => {
      const dataUri = `data:application/octet-stream;base64,${binaryBase64}`
      expect(dataUriToBlob(dataUri).constructor.name).toBe('Blob')
    })
  )
})

it('should return a File for named Blobs', () => {
  fc.assert(
    fc.property(
      fc.tuple(
        fc.base64String(),
        fc.string().filter(s => /^[a-zA-Z0-9._-]+$/.test(s))
      ),
      ([binaryBase64, fileName]) => {
        const dataUri = `data:application/octet-stream;base64,${binaryBase64}`
        expect(dataUriToBlob(dataUri, fileName).constructor.name).toBe('File')
      }
    )
  )
})