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69 lines
1.9 KiB
69 lines
1.9 KiB
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const buffer = require('buffer');
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const SlowBuffer = buffer.SlowBuffer;
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const ones = [1, 1, 1, 1];
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// should create a Buffer
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let sb = SlowBuffer(4);
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assert(sb instanceof Buffer);
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assert.strictEqual(sb.length, 4);
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sb.fill(1);
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for (const [key, value] of sb.entries()) {
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assert.deepStrictEqual(value, ones[key]);
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}
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// underlying ArrayBuffer should have the same length
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assert.strictEqual(sb.buffer.byteLength, 4);
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// should work without new
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sb = SlowBuffer(4);
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assert(sb instanceof Buffer);
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assert.strictEqual(sb.length, 4);
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sb.fill(1);
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for (const [key, value] of sb.entries()) {
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assert.deepStrictEqual(value, ones[key]);
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}
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// should work with edge cases
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assert.strictEqual(SlowBuffer(0).length, 0);
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try {
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assert.strictEqual(
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SlowBuffer(buffer.kMaxLength).length, buffer.kMaxLength);
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} catch (e) {
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assert.strictEqual(e.message, 'Array buffer allocation failed');
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}
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// should work with number-coercible values
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assert.strictEqual(SlowBuffer('6').length, 6);
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assert.strictEqual(SlowBuffer(true).length, 1);
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// should create zero-length buffer if parameter is not a number
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assert.strictEqual(SlowBuffer().length, 0);
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assert.strictEqual(SlowBuffer(NaN).length, 0);
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assert.strictEqual(SlowBuffer({}).length, 0);
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assert.strictEqual(SlowBuffer('string').length, 0);
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// should throw with invalid length
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const bufferMaxSizeMsg = common.expectsError({
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code: 'ERR_INVALID_OPT_VALUE',
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type: RangeError,
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message: /^The value "[^"]*" is invalid for option "size"$/
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}, 2);
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assert.throws(function() {
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SlowBuffer(Infinity);
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}, bufferMaxSizeMsg);
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assert.throws(function() {
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SlowBuffer(-1);
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}, common.expectsError({
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code: 'ERR_INVALID_OPT_VALUE',
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type: RangeError,
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message: 'The value "-1" is invalid for option "size"'
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}));
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assert.throws(function() {
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SlowBuffer(buffer.kMaxLength + 1);
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}, bufferMaxSizeMsg);
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