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| Current File : //proc/self/root/home/ubuntu/node-v16.18.1/test/parallel/test-child-process-execsync-maxbuf.js |
'use strict';
require('../common');
// This test checks that the maxBuffer option for child_process.spawnSync()
// works as expected.
const assert = require('assert');
const { getSystemErrorName } = require('util');
const { execSync } = require('child_process');
const msgOut = 'this is stdout';
const msgOutBuf = Buffer.from(`${msgOut}\n`);
const args = [
'-e',
`"console.log('${msgOut}')";`,
];
// Verify that an error is returned if maxBuffer is surpassed.
{
assert.throws(() => {
execSync(`"${process.execPath}" ${args.join(' ')}`, { maxBuffer: 1 });
}, (e) => {
assert.ok(e, 'maxBuffer should error');
assert.strictEqual(e.code, 'ENOBUFS');
assert.strictEqual(getSystemErrorName(e.errno), 'ENOBUFS');
// We can have buffers larger than maxBuffer because underneath we alloc 64k
// that matches our read sizes.
assert.deepStrictEqual(e.stdout, msgOutBuf);
return true;
});
}
// Verify that a maxBuffer size of Infinity works.
{
const ret = execSync(
`"${process.execPath}" ${args.join(' ')}`,
{ maxBuffer: Infinity }
);
assert.deepStrictEqual(ret, msgOutBuf);
}
// Default maxBuffer size is 1024 * 1024.
{
assert.throws(() => {
execSync(
`"${process.execPath}" -e "console.log('a'.repeat(1024 * 1024))"`
);
}, (e) => {
assert.ok(e, 'maxBuffer should error');
assert.strictEqual(e.code, 'ENOBUFS');
assert.strictEqual(getSystemErrorName(e.errno), 'ENOBUFS');
return true;
});
}
// Default maxBuffer size is 1024 * 1024.
{
const ret = execSync(
`"${process.execPath}" -e "console.log('a'.repeat(1024 * 1024 - 1))"`
);
assert.deepStrictEqual(
ret.toString().trim(),
'a'.repeat(1024 * 1024 - 1)
);
}
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