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// 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 common = require('../common');
const assert = require('assert');
// If everything aligns so that you do a read(n) of exactly the
// remaining buffer, then make sure that 'end' still emits.
const READSIZE = 100;
const PUSHSIZE = 20;
const PUSHCOUNT = 1000;
const HWM = 50;
const Readable = require('stream').Readable;
const r = new Readable({
highWaterMark: HWM
});
const rs = r._readableState;
r._read = push;
r.on('readable', function() {
console.error('>> readable');
let ret;
do {
console.error(` > read(${READSIZE})`);
ret = r.read(READSIZE);
console.error(` < ${ret && ret.length} (${rs.length} remain)`);
} while (ret && ret.length === READSIZE);
console.error('<< after read()',
ret && ret.length,
rs.needReadable,
rs.length);
});
r.on('end', common.mustCall(function() {
assert.strictEqual(pushes, PUSHCOUNT + 1);
}));
let pushes = 0;
function push() {
if (pushes > PUSHCOUNT)
return;
if (pushes++ === PUSHCOUNT) {
console.error(' push(EOF)');
return r.push(null);
}
console.error(` push #${pushes}`);
if (r.push(Buffer.allocUnsafe(PUSHSIZE)))
setTimeout(push, 1);
}
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