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Migrate _stream_readable errors to internal/errors #15042

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benhalverson wants to merge 4 commits into from
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Migrate _stream_readable errors to internal/errors #15042

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b635d1a
stream: migrate _stream_readable use error codes
benhalverson Aug 26, 2017
eafcac4
fix common.expectsError usage in stream tests
joyeecheung Oct 28, 2017
cb38372
delete removed error
joyeecheung Oct 28, 2017
0ccc7e4
add documentations for stream errors
joyeecheung Oct 28, 2017
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8 changes: 5 additions & 3 deletions lib/_stream_readable.js
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@ const util = require('util');
const debug = util.debuglog('stream');
const BufferList = require('internal/streams/BufferList');
const destroyImpl = require('internal/streams/destroy');
const errors = require('internal/errors');
var StringDecoder;

util.inherits(Readable, Stream);
Expand Down Expand Up @@ -233,11 +234,12 @@ function readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {

if (addToFront) {
if (state.endEmitted)
stream.emit('error', new Error('stream.unshift() after end event'));
stream.emit('error',
new errors.Error('ERR_STREAM_UNSHIFT_AFTER_END_EVENT'));
else
addChunk(stream, state, chunk, true);
} else if (state.ended) {
stream.emit('error', new Error('stream.push() after EOF'));
stream.emit('error', new errors.Error('ERR_STREAM_PUSH_AFTER_EOF'));
} else {
state.reading = false;
if (state.decoder && !encoding) {
Expand Down Expand Up @@ -548,7 +550,7 @@ function maybeReadMore_(stream, state) {
// for virtual (non-string, non-buffer) streams, "length" is somewhat
// arbitrary, and perhaps not very meaningful.
Readable.prototype._read = function(n) {
this.emit('error', new Error('_read() is not implemented'));
this.emit('error', new errors.Error('ERR_STREAM_READ_NOT_IMPLEMENTED'));
};

Readable.prototype.pipe = function(dest, pipeOpts) {
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5 changes: 5 additions & 0 deletions lib/internal/errors.js
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Expand Up @@ -323,6 +323,11 @@ E('ERR_SOCKET_CLOSED', 'Socket is closed');
E('ERR_SOCKET_DGRAM_NOT_RUNNING', 'Not running');
E('ERR_STDERR_CLOSE', 'process.stderr cannot be closed');
E('ERR_STDOUT_CLOSE', 'process.stdout cannot be closed');
E('ERR_STREAM_ENDREADABLE_CALLED_ON_NONEMPTY',
'endReadable() called on a non-empty stream');
E('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
E('ERR_STREAM_READ_NOT_IMPLEMENTED', '_read() is not implemented');
E('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');
E('ERR_STREAM_WRAP', 'Stream has StringDecoder set or is in objectMode');
E('ERR_TLS_CERT_ALTNAME_INVALID',
'Hostname/IP does not match certificate\'s altnames: %s');
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7 changes: 5 additions & 2 deletions test/parallel/test-stream-readable-with-unimplemented-_read.js
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@@ -1,8 +1,11 @@
'use strict';
require('../common');
const common = require('../common');
const stream = require('stream');
const assert = require('assert');

const readable = new stream.Readable();

assert.throws(() => readable.read(), /not implemented/);
assert.throws(() => readable.read(), common.expectsError({
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@BridgeAR BridgeAR Oct 1, 2017

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Just as a suggestion - it would be nicer to use

common.expectsError(throwingFn, errorObj)
// instead of
assert.throws(throwingFn, common.expectsError(errorObj))

type: Error,
message: 'ERR_STREAM_READ_NOT_IMPLEMENTED'
}));
5 changes: 4 additions & 1 deletion test/parallel/test-stream-unshift-read-race.js
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Expand Up @@ -70,7 +70,10 @@ r._read = function(n) {
function pushError() {
assert.throws(function() {
r.push(Buffer.allocUnsafe(1));
}, /^Error: stream\.push\(\) after EOF$/);
}, common.expectsError({
type: Error,
message: 'stream.push() after EOF'
}));
}


Expand Down