test: increase usage of assert.ifError()

PR-URL: https://github.com/nodejs/node/pull/10543
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/test/parallel/test-fs-readfile-fd.js b/test/parallel/test-fs-readfile-fd.js
index 6420dbfdd0..190a10fc53 100644
--- a/test/parallel/test-fs-readfile-fd.js
+++ b/test/parallel/test-fs-readfile-fd.js
@@ -29,11 +29,10 @@ tempFdSync(function(fd) {
 
 function tempFd(callback) {
   fs.open(fn, 'r', function(err, fd) {
-    if (err) throw err;
-
+    assert.ifError(err);
     callback(fd, function() {
       fs.close(fd, function(err) {
-        if (err) throw err;
+        assert.ifError(err);
       });
     });
   });