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'use strict';
require('../common');
// This test checks that the maxBuffer option for child_process.spawnSync()
// works as expected.
const assert = require('assert');
const spawnSync = require('child_process').spawnSync;
const { getSystemErrorName } = require('util');
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.
{
const ret = spawnSync(process.execPath, args, { maxBuffer: 1 });
assert.ok(ret.error, 'maxBuffer should error');
assert.strictEqual(ret.error.code, 'ENOBUFS');
assert.strictEqual(getSystemErrorName(ret.error.errno), 'ENOBUFS');
// We can have buffers larger than maxBuffer because underneath we alloc 64k
// that matches our read sizes.
assert.deepStrictEqual(ret.stdout, msgOutBuf);
}
// Verify that a maxBuffer size of Infinity works.
{
const ret = spawnSync(process.execPath, args, { maxBuffer: Infinity });
assert.ifError(ret.error);
assert.deepStrictEqual(ret.stdout, msgOutBuf);
}
// Default maxBuffer size is 1024 * 1024.
{
const args = ['-e', "console.log('a'.repeat(1024 * 1024))"];
const ret = spawnSync(process.execPath, args);
assert.ok(ret.error, 'maxBuffer should error');
assert.strictEqual(ret.error.code, 'ENOBUFS');
assert.strictEqual(getSystemErrorName(ret.error.errno), 'ENOBUFS');
}
// Default maxBuffer size is 1024 * 1024.
{
const args = ['-e', "console.log('a'.repeat(1024 * 1024 - 1))"];
const ret = spawnSync(process.execPath, args);
assert.ifError(ret.error);
assert.deepStrictEqual(
ret.stdout.toString().trim(),
'a'.repeat(1024 * 1024 - 1)
);
}
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