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test: fix another flaky stringbytes test #6073

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Merged
merged 1 commit into from
Apr 6, 2016
Merged

test: fix another flaky stringbytes test #6073

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4 changes: 3 additions & 1 deletion test/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,9 @@ Tests for when the `--abort-on-uncaught-exception` flag is used.

### addons

Tests for [addon](https://nodejs.org/api/addons.html) functionality.
Tests for [addon](https://nodejs.org/api/addons.html) functionality along with
some tests that require an addon to function properly.


| Runs on CI |
|:----------:|
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14 changes: 8 additions & 6 deletions ...allel/test-stringbytes-external-at-max.js → ...d-max/test-stringbytes-external-at-max.js
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@@ -1,7 +1,7 @@
'use strict';
// Flags: --expose-gc

const common = require('../common');
const common = require('../../common');
const binding = require('./build/Release/binding');
const assert = require('assert');

// v8 fails silently if string length > v8::String::kMaxLength
Expand All @@ -14,19 +14,21 @@ if (!common.enoughTestMem) {
console.log(skipMessage);
return;
}
assert(typeof gc === 'function', 'Run this test with --expose-gc');

try {
var buf = Buffer.allocUnsafe(kStringMaxLength);
// Try to allocate memory first then force gc so future allocations succeed.
Buffer.allocUnsafe(2 * kStringMaxLength);
gc();
} catch (e) {
// If the exception is not due to memory confinement then rethrow it.
if (e.message !== 'Array buffer allocation failed') throw (e);
console.log(skipMessage);
return;
}

// Ensure we have enough memory available for future allocations to succeed.
if (!binding.ensureAllocation(2 * kStringMaxLength)) {
console.log(skipMessage);
return;
}

const maxString = buf.toString('binary');
assert.equal(maxString.length, kStringMaxLength);