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// Flags: --expose-internals
'use strict';
const common = require('../common');
const assert = require('assert');
const {
validateOffsetLengthRead,
validateOffsetLengthWrite,
} = require('internal/fs/utils');
{
const offset = -1;
assert.throws(
() => validateOffsetLengthRead(offset, 0, 0),
common.expectsError({
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "offset" is out of range. ' +
`It must be >= 0. Received ${offset}`
})
);
}
{
const length = -1;
assert.throws(
() => validateOffsetLengthRead(0, length, 0),
common.expectsError({
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "length" is out of range. ' +
`It must be >= 0. Received ${length}`
})
);
}
{
const offset = 1;
const length = 1;
const byteLength = offset + length - 1;
assert.throws(
() => validateOffsetLengthRead(offset, length, byteLength),
common.expectsError({
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "length" is out of range. ' +
`It must be <= ${byteLength - offset}. Received ${length}`
})
);
}
// Most platforms don't allow reads or writes >= 2 GiB.
// See https://github.com/libuv/libuv/pull/1501.
const kIoMaxLength = 2 ** 31 - 1;
// RangeError when offset > byteLength
{
const offset = 100;
const length = 100;
const byteLength = 50;
assert.throws(
() => validateOffsetLengthWrite(offset, length, byteLength),
common.expectsError({
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "offset" is out of range. ' +
`It must be <= ${byteLength}. Received ${offset}`
})
);
}
// RangeError when byteLength < kIoMaxLength, and length > byteLength - offset.
{
const offset = kIoMaxLength - 150;
const length = 200;
const byteLength = kIoMaxLength - 100;
assert.throws(
() => validateOffsetLengthWrite(offset, length, byteLength),
common.expectsError({
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "length" is out of range. ' +
`It must be <= ${byteLength - offset}. Received ${length}`
})
);
}
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