'use strict'

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

// Test interaction between calling .destroy() on a writable and pending
// writes.

for (const withPendingData of [false, true]) {
  for (const useEnd of [false, true]) {
    const callbacks = []
    const w = new Writable({
      write(data, enc, cb) {
        callbacks.push(cb)
      },
      // Effectively disable the HWM to observe 'drain' events more easily.
      highWaterMark: 1
    })
    let chunksWritten = 0
    let drains = 0
    w.on('drain', () => drains++)
    function onWrite(err) {
      if (err) {
        assert.strictEqual(w.destroyed, true)
        assert.strictEqual(err.code, 'ERR_STREAM_DESTROYED')
      } else {
        chunksWritten++
      }
    }
    w.write('abc', onWrite)
    assert.strictEqual(chunksWritten, 0)
    assert.strictEqual(drains, 0)
    callbacks.shift()()
    assert.strictEqual(chunksWritten, 1)
    assert.strictEqual(drains, 1)
    if (withPendingData) {
      // Test 2 cases: There either is or is not data still in the write queue.
      // (The second write will never actually get executed either way.)
      w.write('def', onWrite)
    }
    if (useEnd) {
      // Again, test 2 cases: Either we indicate that we want to end the
      // writable or not.
      w.end('ghi', onWrite)
    } else {
      w.write('ghi', onWrite)
    }
    assert.strictEqual(chunksWritten, 1)
    w.destroy()
    assert.strictEqual(chunksWritten, 1)
    callbacks.shift()()
    assert.strictEqual(chunksWritten, useEnd && !withPendingData ? 1 : 2)
    assert.strictEqual(callbacks.length, 0)
    assert.strictEqual(drains, 1)
  }
}

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