test: Fix test-fs-read-stream-fd-leak race cond

Fix intermittent test failure on slower machines. Gives test longer time to complete but checks at regular intervals so that the test only runs longer on slower machines or in the failure case. PR-URL: #3218 Fixes: #3215 Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: James Snell <jasnell@gmail.com>>

Author: Junliang Yan

test/parallel/test-fs-read-stream-fd-leak.js

@@ -10,6 +10,7 @@ var _fsopen = fs.open;
 var _fsclose = fs.close;
 
 var loopCount = 50;
+var totalCheck = 50;
 var emptyTxt = path.join(common.fixturesDir, 'empty.txt');
 
 fs.open = function() {
@@ -26,19 +27,27 @@ function testLeak(endFn, callback) {
  console.log('testing for leaks from fs.createReadStream().%s()...', endFn);
 
  var i = 0;
+ var check = 0;
+
+ var checkFunction = function() {
+ if (openCount != 0 && check < totalCheck) {
+ check++;
+ setTimeout(checkFunction, 100);
+ return;
+ }
+ assert.equal(0, openCount, 'no leaked file descriptors using ' +
+ endFn + '() (got ' + openCount + ')');
+ openCount = 0;
+ callback && setTimeout(callback, 100);
+ };
 
  setInterval(function() {
  var s = fs.createReadStream(emptyTxt);
  s[endFn]();
 
  if (++i === loopCount) {
  clearTimeout(this);
- setTimeout(function() {
- assert.equal(0, openCount, 'no leaked file descriptors using ' +
- endFn + '() (got ' + openCount + ')');
- openCount = 0;
- callback && setTimeout(callback, 100);
- }, 100);
+ setTimeout(checkFunction, 100);
  }
  }, 2);
 }