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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').Readable;
{
// First test, not reading when the readable is added.
// make sure that on('readable', ...) triggers a readable event.
const r = new Readable({
highWaterMark: 3
});
r._read = common.mustNotCall();
// This triggers a 'readable' event, which is lost.
r.push(Buffer.from('blerg'));
setTimeout(function() {
// We're testing what we think we are
assert(!r._readableState.reading);
r.on('readable', common.mustCall());
}, 1);
}
{
// Second test, make sure that readable is re-emitted if there's
// already a length, while it IS reading.
const r = new Readable({
highWaterMark: 3
});
r._read = common.mustCall();
// This triggers a 'readable' event, which is lost.
r.push(Buffer.from('bl'));
setTimeout(function() {
// Assert we're testing what we think we are
assert(r._readableState.reading);
r.on('readable', common.mustCall());
}, 1);
}
{
// Third test, not reading when the stream has not passed
// the highWaterMark but *has* reached EOF.
const r = new Readable({
highWaterMark: 30
});
r._read = common.mustNotCall();
// This triggers a 'readable' event, which is lost.
r.push(Buffer.from('blerg'));
r.push(null);
setTimeout(function() {
// Assert we're testing what we think we are
assert(!r._readableState.reading);
r.on('readable', common.mustCall());
}, 1);
}
{
// Pushing an empty string in non-objectMode should
// trigger next `read()`.
const underlyingData = ['', 'x', 'y', '', 'z'];
const expected = underlyingData.filter((data) => data);
const result = [];
const r = new Readable({
encoding: 'utf8',
});
r._read = function() {
process.nextTick(() => {
if (!underlyingData.length) {
this.push(null);
} else {
this.push(underlyingData.shift());
}
});
};
r.on('readable', () => {
const data = r.read();
if (data !== null) result.push(data);
});
r.on('end', common.mustCall(() => {
assert.deepStrictEqual(result, expected);
}));
}
{
// #20923
const r = new Readable();
r._read = function() {
// Actually doing thing here
};
r.on('data', function() {});
r.removeAllListeners();
assert.strictEqual(r.eventNames().length, 0);
}