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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: R } = require('stream');
class TestReader extends R {
constructor(n, opts) {
super(opts);
this.pos = 0;
this.len = n || 100;
}
_read(n) {
setTimeout(() => {
if (this.pos >= this.len) {
// Double push(null) to test eos handling
this.push(null);
return this.push(null);
}
n = Math.min(n, this.len - this.pos);
if (n <= 0) {
// Double push(null) to test eos handling
this.push(null);
return this.push(null);
}
this.pos += n;
const ret = Buffer.alloc(n, 'a');
return this.push(ret);
}, 1);
}
}
{
// Verify utf8 encoding
const tr = new TestReader(100);
tr.setEncoding('utf8');
const out = [];
const expect =
[ 'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa' ];
tr.on('readable', function flow() {
let chunk;
while (null !== (chunk = tr.read(10)))
out.push(chunk);
});
tr.on('end', common.mustCall(function() {
assert.deepStrictEqual(out, expect);
}));
}
{
// Verify hex encoding
const tr = new TestReader(100);
tr.setEncoding('hex');
const out = [];
const expect =
[ '6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161' ];
tr.on('readable', function flow() {
let chunk;
while (null !== (chunk = tr.read(10)))
out.push(chunk);
});
tr.on('end', common.mustCall(function() {
assert.deepStrictEqual(out, expect);
}));
}
{
// Verify hex encoding with read(13)
const tr = new TestReader(100);
tr.setEncoding('hex');
const out = [];
const expect =
[ '6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'16161' ];
tr.on('readable', function flow() {
let chunk;
while (null !== (chunk = tr.read(13)))
out.push(chunk);
});
tr.on('end', common.mustCall(function() {
assert.deepStrictEqual(out, expect);
}));
}
{
// Verify base64 encoding
const tr = new TestReader(100);
tr.setEncoding('base64');
const out = [];
const expect =
[ 'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYQ==' ];
tr.on('readable', function flow() {
let chunk;
while (null !== (chunk = tr.read(10)))
out.push(chunk);
});
tr.on('end', common.mustCall(function() {
assert.deepStrictEqual(out, expect);
}));
}
{
// Verify utf8 encoding
const tr = new TestReader(100, { encoding: 'utf8' });
const out = [];
const expect =
[ 'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa',
'aaaaaaaaaa' ];
tr.on('readable', function flow() {
let chunk;
while (null !== (chunk = tr.read(10)))
out.push(chunk);
});
tr.on('end', common.mustCall(function() {
assert.deepStrictEqual(out, expect);
}));
}
{
// Verify hex encoding
const tr = new TestReader(100, { encoding: 'hex' });
const out = [];
const expect =
[ '6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161',
'6161616161' ];
tr.on('readable', function flow() {
let chunk;
while (null !== (chunk = tr.read(10)))
out.push(chunk);
});
tr.on('end', common.mustCall(function() {
assert.deepStrictEqual(out, expect);
}));
}
{
// Verify hex encoding with read(13)
const tr = new TestReader(100, { encoding: 'hex' });
const out = [];
const expect =
[ '6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'1616161616161',
'6161616161616',
'16161' ];
tr.on('readable', function flow() {
let chunk;
while (null !== (chunk = tr.read(13)))
out.push(chunk);
});
tr.on('end', common.mustCall(function() {
assert.deepStrictEqual(out, expect);
}));
}
{
// Verify base64 encoding
const tr = new TestReader(100, { encoding: 'base64' });
const out = [];
const expect =
[ 'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYWFhYWFh',
'YWFhYWFhYW',
'FhYQ==' ];
tr.on('readable', function flow() {
let chunk;
while (null !== (chunk = tr.read(10)))
out.push(chunk);
});
tr.on('end', common.mustCall(function() {
assert.deepStrictEqual(out, expect);
}));
}
{
// Verify chaining behavior
const tr = new TestReader(100);
assert.deepStrictEqual(tr.setEncoding('utf8'), tr);
}
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