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test-buffer-tostring-hex.js
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37 lines (31 loc) · 1.06 KB
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'use strict';
// Flags: --expose-gc
const common = require('../common');
const assert = require('assert');
// Maximum length in bytes that V8 can handle.
// This equals to 268435440 bytes = (256 * 1024 * 1024) - 16
const kMaxLength = (1 << 28) - 16;
const skipMessage =
'1..0 # Skipped: intensive toString tests due to memory confinements';
if (!common.enoughTestMem) {
console.log(skipMessage);
return;
}
assert(typeof gc === 'function', 'Run this test with --expose-gc');
try {
var buf = new Buffer(kMaxLength / 2 + 1);
// Try to allocate memory first then force gc so future allocations succeed.
new Buffer(2 * kMaxLength);
gc();
} catch(e) {
// If the exception is not due to memory confinement then rethrow it.
if (e.message !== 'Invalid array buffer length') throw (e);
console.log(skipMessage);
return;
}
// Ignore first byte. This should be successful.
var maxString = buf.toString('hex', 1);
assert.equal(maxString.length, kMaxLength);
// This should fail and return undefined.
maxString = buf.toString('hex');
assert.equal(maxString, undefined);