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buffer,error: improve bigint, big numbers and more
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This improves the error message from `ERR_OUT_OF_RANGE` by closer
inspecting the value and logging numbers above 2 ** 32 by adding
commas to the output for integer and bigint. BigInt is now also
marked if used.

Buffer errors also format the range as 2 ** n instead of showing a
huge number.
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BridgeAR committed Apr 15, 2019
1 parent 9dcc9b6 commit 8dd4ba0
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Showing 8 changed files with 50 additions and 13 deletions.
15 changes: 14 additions & 1 deletion lib/internal/buffer.js
Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,20 @@ function checkBounds(buf, offset, byteLength) {

function checkInt(value, min, max, buf, offset, byteLength) {
if (value > max || value < min) {
throw new ERR_OUT_OF_RANGE('value', `>= ${min} and <= ${max}`, value);
// eslint-disable-next-line valid-typeof
const n = typeof min === 'bigint' ? 'n' : '';
let range;
if (byteLength > 3) {
if (min === 0 || min === 0n) {
range = `>= 0${n} and < 2${n} ** ${(byteLength + 1) * 8}${n}`;
} else {
range = `>= -(2${n} ** ${(byteLength + 1) * 8 - 1}${n}) and < 2 ** ` +
`${(byteLength + 1) * 8 - 1}${n}`;
}
} else {
range = `>= ${min}${n} and <= ${max}${n}`;
}
throw new ERR_OUT_OF_RANGE('value', range, value);
}
checkBounds(buf, offset, byteLength);
}
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17 changes: 15 additions & 2 deletions lib/internal/errors.js
Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@
// value statically and permanently identifies the error. While the error
// message may change, the code should not.

const { Object } = primordials;
const { Object, Math } = primordials;

const kCode = Symbol('code');
const kInfo = Symbol('info');
Expand Down Expand Up @@ -999,7 +999,20 @@ E('ERR_OUT_OF_RANGE',
assert(range, 'Missing "range" argument');
let msg = replaceDefaultBoolean ? str :
`The value of "${str}" is out of range.`;
msg += ` It must be ${range}. Received ${input}`;
let received;
if (Number.isInteger(input) && Math.abs(input) > 2 ** 32) {
received = String(input).replace(/(\d)(?=(\d\d\d)+(?!\d))/g, '$1,');
// eslint-disable-next-line valid-typeof
} else if (typeof input === 'bigint') {
received = String(input);
if (input > 2n ** 32n || input < -(2n ** 32n)) {
received = received.replace(/(\d)(?=(\d\d\d)+(?!\d))/g, '$1,');
}
received += 'n';
} else {
received = lazyInternalUtilInspect().inspect(input);
}
msg += ` It must be ${range}. Received ${received}`;
return msg;
}, RangeError);
E('ERR_REQUIRE_ESM', 'Must use import to load ES Module: %s', Error);
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6 changes: 5 additions & 1 deletion test/parallel/test-buffer-bigint64.js
Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,11 @@ const buf = Buffer.allocUnsafe(8);
assert.throws(function() {
const val = 0x10000000000000000n;
buf['writeBigUInt64' + endianness](val, 0);
}, RangeError);
}, {
code: 'ERR_OUT_OF_RANGE',
message: 'The value of "value" is out of range. It must be ' +
'>= 0n and < 2n ** 64n. Received 18,446,744,073,709,551,616n'
});

// Should throw a TypeError upon invalid input
assert.throws(function() {
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8 changes: 6 additions & 2 deletions test/parallel/test-buffer-writeint.js
Original file line number Diff line number Diff line change
Expand Up @@ -217,15 +217,19 @@ const errorOutOfBounds = common.expectsError({
['writeIntBE', 'writeIntLE'].forEach((fn) => {
const min = -(2 ** (i * 8 - 1));
const max = 2 ** (i * 8 - 1) - 1;

let range = `>= ${min} and <= ${max}`;
if (i > 4) {
range = `>= -(2 ** ${i * 8 - 1}) and < 2 ** ${i * 8 - 1}`;
}
[min - 1, max + 1].forEach((val) => {
const received = i > 4 ? val.toLocaleString() : val;
assert.throws(() => {
data[fn](val, 0, i);
}, {
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "value" is out of range. ' +
`It must be >= ${min} and <= ${max}. Received ${val}`
`It must be ${range}. Received ${received}`
});
});

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4 changes: 3 additions & 1 deletion test/parallel/test-buffer-writeuint.js
Original file line number Diff line number Diff line change
Expand Up @@ -171,14 +171,16 @@ const assert = require('assert');

// Test 1 to 6 bytes.
for (let i = 1; i < 6; i++) {
const range = i < 5 ? `= ${val - 1}` : ` 2 ** ${i * 8}`;
const received = i > 4 ? val.toLocaleString() : val;
['writeUIntBE', 'writeUIntLE'].forEach((fn) => {
assert.throws(() => {
data[fn](val, 0, i);
}, {
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "value" is out of range. ' +
`It must be >= 0 and <= ${val - 1}. Received ${val}`
`It must be >= 0 and <${range}. Received ${received}`
});

['', '0', null, {}, [], () => {}, true, false].forEach((o) => {
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4 changes: 2 additions & 2 deletions test/parallel/test-crypto-pbkdf2.js
Original file line number Diff line number Diff line change
Expand Up @@ -111,8 +111,8 @@ assert.throws(
}, {
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "keylen" is out of range. It ' +
`must be >= 0 && < 4294967296. Received ${input}`
message: 'The value of "keylen" is out of range. It must be ' +
`>= 0 && < 4294967296. Received ${input.toLocaleString()}`
});
});

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5 changes: 3 additions & 2 deletions test/parallel/test-event-emitter-max-listeners.js
Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@
'use strict';
const common = require('../common');
const events = require('events');
const { inspect } = require('util');
const e = new events.EventEmitter();

e.on('maxListeners', common.mustCall());
Expand All @@ -38,7 +39,7 @@ for (const obj of throwsObjs) {
code: 'ERR_OUT_OF_RANGE',
type: RangeError,
message: 'The value of "n" is out of range. ' +
`It must be a non-negative number. Received ${obj}`
`It must be a non-negative number. Received ${inspect(obj)}`
}
);

Expand All @@ -48,7 +49,7 @@ for (const obj of throwsObjs) {
code: 'ERR_OUT_OF_RANGE',
type: RangeError,
message: 'The value of "defaultMaxListeners" is out of range. ' +
`It must be a non-negative number. Received ${obj}`
`It must be a non-negative number. Received ${inspect(obj)}`
}
);
}
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4 changes: 2 additions & 2 deletions test/parallel/test-file-write-stream3.js
Original file line number Diff line number Diff line change
Expand Up @@ -199,8 +199,8 @@ const run_test_5 = common.mustCall(function() {
};
const err = {
code: 'ERR_OUT_OF_RANGE',
message: 'The value of "start" is out of range. ' +
'It must be >= 0 and <= 2 ** 53 - 1. Received 9007199254740992',
message: 'The value of "start" is out of range. It must be ' +
'>= 0 and <= 2 ** 53 - 1. Received 9,007,199,254,740,992',
type: RangeError
};
common.expectsError(fn, err);
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