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test: fix test-sync-io-option #1734

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test: fix test-sync-io-option #1734

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22 changes: 12 additions & 10 deletions test/parallel/test-sync-io-option.js
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Original file line number Diff line number Diff line change
Expand Up @@ -15,24 +15,26 @@ if (process.argv[2] === 'child') {
var execArgv = [flags.pop()];
var args = [__filename, 'child'];
var child = spawn(process.execPath, execArgv.concat(args));
var cntr = 0;
var stderr = '';

child.stdout.on('data', function(chunk) {
throw new Error('UNREACHABLE');
});

child.stderr.on('data', function(chunk) {
// Prints twice for --trace-sync-io. First for the require() and second
// for the fs operation.
if (/^WARNING[\s\S]*fs\.readFileSync/.test(chunk.toString()))
cntr++;
stderr += chunk.toString();
});

child.on('exit', function() {
if (execArgv[0] === '--trace-sync-io')
assert.equal(cntr, 2);
else if (execArgv[0] === ' ')
assert.equal(cntr, 0);
child.on('close', function() {
var cntr1 = (stderr.match(/WARNING/g) || []).length;
var cntr2 = (stderr.match(/fs\.readFileSync/g) || []).length;
assert.equal(cntr1, cntr2);
if (execArgv[0] === '--trace-sync-io') {
// Prints 4 WARNINGS for --trace-sync-io. 1 for each sync call
// inside readFileSync
assert.equal(cntr1, 4);
} else if (execArgv[0] === ' ')
assert.equal(cntr1, 0);
else
throw new Error('UNREACHABLE');

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