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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');
const { Readable } = require('stream');
let len = 0;
const chunks = new Array(10);
for (let i = 1; i <= 10; i++) {
chunks[i - 1] = Buffer.allocUnsafe(i);
len += i;
}
const test = new Readable();
let n = 0;
test._read = function(size) {
const chunk = chunks[n++];
setTimeout(function() {
test.push(chunk === undefined ? null : chunk);
}, 1);
};
test.on('end', thrower);
function thrower() {
throw new Error('this should not happen!');
}
let bytesread = 0;
test.on('readable', function() {
const b = len - bytesread - 1;
const res = test.read(b);
if (res) {
bytesread += res.length;
console.error(`br=${bytesread} len=${len}`);
setTimeout(next, 1);
}
test.read(0);
});
test.read(0);
function next() {
// Now let's make 'end' happen
test.removeListener('end', thrower);
test.on('end', common.mustCall());
// One to get the last byte
let r = test.read();
assert(r);
assert.strictEqual(r.length, 1);
r = test.read();
assert.strictEqual(r, null);
}
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