import { applyDefaultContentType, isFormDataPayload } from '@/utils/request-payload'

describe('request payload content type policy', () => {
  it('leaves FormData content type to the browser', () => {
    const headers = {}
    const data = new FormData()

    applyDefaultContentType(headers, data)

    expect(isFormDataPayload(data)).toBe(true)
    expect(headers['Content-Type']).toBeUndefined()
  })

  it('keeps JSON defaults for ordinary payloads', () => {
    const headers = {}
    const data = { requestId: 'request-id' }

    applyDefaultContentType(headers, data)

    expect(isFormDataPayload(data)).toBe(false)
    expect(isFormDataPayload(undefined)).toBe(false)
    expect(headers['Content-Type']).toBe('application/json')
  })
})