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test: spawn new processes in vm-cached-data #6280

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test: spawn new processes in vm-cached-data #6280

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test: spawn new processes in vm-cached-data
indutny Apr 19, 2016
85c7fb7
fix
indutny Apr 20, 2016
56b1001
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indutny Apr 20, 2016
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35 changes: 26 additions & 9 deletions test/parallel/test-vm-cached-data.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,19 +2,38 @@
require('../common');
const assert = require('assert');
const vm = require('vm');
const spawnSync = require('child_process').spawnSync;
const Buffer = require('buffer').Buffer;

function getSource(tag) {
return `(function ${tag}() { return \'${tag}\'; })`;
}

function produce(source) {
const script = new vm.Script(source, {
produceCachedData: true
});
assert(!script.cachedDataProduced || script.cachedData instanceof Buffer);
function produce(source, count) {
if (!count)
count = 1;

const out = spawnSync(process.execPath, [ '-e', `
var assert = require('assert');
var vm = require('vm');

let data;
for (var i = 0; i < ${count}; i++) {
var script = new vm.Script(process.argv[1], {
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Just for my understanding, process.argv[1] === undefined here, right?

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It is not, see source on line 32.

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$ node -e 'console.log(process.argv[1])' hello
hello

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Bet you didn't know about this 😉

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Oh, I missed the third argument. Never mind.

produceCachedData: true
});

assert(!script.cachedDataProduced || script.cachedData instanceof Buffer);

if (script.cachedDataProduced)
data = script.cachedData.toString('base64');
}
console.log(data);
`, source]);

assert.equal(out.status, 0, out.stderr + '');

return script.cachedData;
return Buffer.from(out.stdout.toString(), 'base64');
}

function testProduceConsume() {
Expand All @@ -34,9 +53,7 @@ testProduceConsume();
function testProduceMultiple() {
const source = getSource('original');

produce(source);
produce(source);
produce(source);
produce(source, 3);
}
testProduceMultiple();

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