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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 stream = require('stream');
const str = 'asdfasdfasdfasdfasdf';
const r = new stream.Readable({
highWaterMark: 5,
encoding: 'utf8'
});
let reads = 0;
function _read() {
if (reads === 0) {
setTimeout(() => {
r.push(str);
}, 1);
reads++;
} else if (reads === 1) {
const ret = r.push(str);
assert.strictEqual(ret, false);
reads++;
} else {
r.push(null);
}
}
r._read = common.mustCall(_read, 3);
r.on('end', common.mustCall());
// Push some data in to start.
// We've never gotten any read event at this point.
const ret = r.push(str);
// Should be false. > hwm
assert(!ret);
let chunk = r.read();
assert.strictEqual(chunk, str);
chunk = r.read();
assert.strictEqual(chunk, null);
r.once('readable', () => {
// This time, we'll get *all* the remaining data, because
// it's been added synchronously, as the read WOULD take
// us below the hwm, and so it triggered a _read() again,
// which synchronously added more, which we then return.
chunk = r.read();
assert.strictEqual(chunk, str + str);
chunk = r.read();
assert.strictEqual(chunk, null);
});
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