fix(ci): Show progress when running tests.

CircleCI will timeout the test if it doesn't see any output for 10
minutes. This prints out a '.' with every bit of stdio input to show that
we're making progress.

Author: heathkit

scripts/test/test_util.js

@@ -79,14 +79,16 @@ var CommandlineTest = function(command) {
         test_process = child_process.spawn(args[0], args.slice(1));
 
         test_process.stdout.on('data', function(data) {
+          process.stdout.write('.');
           output += data;
         });
 
         test_process.stderr.on('data', function(data) {
           output += data;
         });
       } else {
-        test_process = child_process.spawn(args[0], args.slice(1), {stdio: 'inherit'});
+        test_process = child_process
+            .spawn(args[0], args.slice(1), {stdio: 'inherit', stderr: 'inherit'});
       }
 
       test_process.on('error', function(err) {