mirror of https://github.com/nodejs/node.git
49 lines
1.5 KiB
JavaScript
49 lines
1.5 KiB
JavaScript
// Flags: --expose-gc
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'use strict';
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const common = require('../../common');
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const skipMessage = 'intensive toString tests due to memory confinements';
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if (!common.enoughTestMem)
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common.skip(skipMessage);
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const binding = require(`./build/${common.buildType}/binding`);
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const assert = require('assert');
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// v8 fails silently if string length > v8::String::kMaxLength
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// v8::String::kMaxLength defined in v8.h
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const kStringMaxLength = require('buffer').constants.MAX_STRING_LENGTH;
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let buf;
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try {
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buf = Buffer.allocUnsafe(kStringMaxLength + 1);
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} catch (e) {
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// If the exception is not due to memory confinement then rethrow it.
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if (e.message !== 'Array buffer allocation failed') throw (e);
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common.skip(skipMessage);
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}
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// Ensure we have enough memory available for future allocations to succeed.
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if (!binding.ensureAllocation(2 * kStringMaxLength))
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common.skip(skipMessage);
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const stringLengthHex = kStringMaxLength.toString(16);
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assert.throws(() => {
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buf.toString('latin1');
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}, {
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message: `Cannot create a string longer than 0x${stringLengthHex} ` +
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'characters',
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code: 'ERR_STRING_TOO_LONG',
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name: 'Error',
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});
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// FIXME: Free the memory early to avoid OOM.
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// REF: https://github.com/nodejs/reliability/issues/12#issuecomment-412619655
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global.gc();
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let maxString = buf.toString('latin1', 1);
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assert.strictEqual(maxString.length, kStringMaxLength);
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maxString = undefined;
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global.gc();
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maxString = buf.toString('latin1', 0, kStringMaxLength);
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assert.strictEqual(maxString.length, kStringMaxLength);
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