// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict'

const tap = require('tap')
const silentConsole = {
  log() {},
  error() {}
}
require('../common')
const assert = require('assert')

// This test verifies that stream.unshift(Buffer.alloc(0)) or
// stream.unshift('') does not set state.reading=false.
const Readable = require('../../lib/ours/index').Readable
const r = new Readable()
let nChunks = 10
const chunk = Buffer.alloc(10, 'x')
r._read = function (n) {
  setImmediate(() => {
    r.push(--nChunks === 0 ? null : chunk)
  })
}
let readAll = false
const seen = []
r.on('readable', () => {
  let chunk
  while ((chunk = r.read()) !== null) {
    seen.push(chunk.toString())
    // Simulate only reading a certain amount of the data,
    // and then putting the rest of the chunk back into the
    // stream, like a parser might do.  We just fill it with
    // 'y' so that it's easy to see which bits were touched,
    // and which were not.
    const putBack = Buffer.alloc(readAll ? 0 : 5, 'y')
    readAll = !readAll
    r.unshift(putBack)
  }
})
const expect = [
  'xxxxxxxxxx',
  'yyyyy',
  'xxxxxxxxxx',
  'yyyyy',
  'xxxxxxxxxx',
  'yyyyy',
  'xxxxxxxxxx',
  'yyyyy',
  'xxxxxxxxxx',
  'yyyyy',
  'xxxxxxxxxx',
  'yyyyy',
  'xxxxxxxxxx',
  'yyyyy',
  'xxxxxxxxxx',
  'yyyyy',
  'xxxxxxxxxx',
  'yyyyy'
]
r.on('end', () => {
  assert.deepStrictEqual(seen, expect)
  silentConsole.log('ok')
})

/* replacement start */
process.on('beforeExit', (code) => {
  if (code === 0) {
    tap.pass('test succeeded')
  } else {
    tap.fail(`test failed - exited code ${code}`)
  }
})
/* replacement end */
