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'use strict';
const common = require('../common');
const assert = require('assert');
const buffer = require('buffer');
const SlowBuffer = buffer.SlowBuffer;
const ones = [1, 1, 1, 1];
// should create a Buffer
let sb = SlowBuffer(4);
assert(sb instanceof Buffer);
assert.strictEqual(sb.length, 4);
sb.fill(1);
for (const [key, value] of sb.entries()) {
assert.deepStrictEqual(value, ones[key]);
}
// underlying ArrayBuffer should have the same length
assert.strictEqual(sb.buffer.byteLength, 4);
// should work without new
sb = SlowBuffer(4);
assert(sb instanceof Buffer);
assert.strictEqual(sb.length, 4);
sb.fill(1);
for (const [key, value] of sb.entries()) {
assert.deepStrictEqual(value, ones[key]);
}
// should work with edge cases
assert.strictEqual(SlowBuffer(0).length, 0);
try {
assert.strictEqual(
SlowBuffer(buffer.kMaxLength).length, buffer.kMaxLength);
} catch (e) {
// Don't match on message as it is from the JavaScript engine. V8 and
// ChakraCore provide different messages.
assert.strictEqual(e.name, 'RangeError');
}
// should work with number-coercible values
assert.strictEqual(SlowBuffer('6').length, 6);
assert.strictEqual(SlowBuffer(true).length, 1);
// Should create zero-length buffer if parameter is not a number
assert.strictEqual(SlowBuffer().length, 0);
assert.strictEqual(SlowBuffer(NaN).length, 0);
assert.strictEqual(SlowBuffer({}).length, 0);
assert.strictEqual(SlowBuffer('string').length, 0);
// should throw with invalid length
const bufferMaxSizeMsg = common.expectsError({
code: 'ERR_INVALID_OPT_VALUE',
type: RangeError,
message: /^The value "[^"]*" is invalid for option "size"$/
}, 2);
assert.throws(function() {
SlowBuffer(Infinity);
}, bufferMaxSizeMsg);
common.expectsError(function() {
SlowBuffer(-1);
}, {
code: 'ERR_INVALID_OPT_VALUE',
type: RangeError,
message: 'The value "-1" is invalid for option "size"'
});
assert.throws(function() {
SlowBuffer(buffer.kMaxLength + 1);
}, bufferMaxSizeMsg);
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