Print testCase.commands only once if --verbose was specified

tools/testing/dart/test_runner.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Classes and methods for executing tests.
  *
  * This module includes:
  * - Managing parallel execution of tests, including timeout checks.
  * - Evaluating the output of each test as pass/fail/crash/timeout.
@@ skipping 1576 matching lines @@
         return;
       }
       if (test.usesWebDriver && _needsSelenium && !_isSeleniumAvailable || (test
           is BrowserTestCase && test.waitingForOtherTest)) {
         // The test is not yet ready to run. Put the test back in
         // the queue.  Avoid spin-polling by using a timeout.
         _tests.add(test);
         new Timer(100, (_) => _tryRunTest());  // Don't lose a process.
         return;
       }
-      if (_verbose) {
+      // Before running any commands, we print out all commands if '--verbose'
+      // was specified.
+      if (_verbose && test.commandOutputs.length == 0) {
         int i = 1;
         if (test is BrowserTestCase) {
           // Additional command for rerunning the steps locally after the fact.
           print('$i. ${TestUtils.dartTestExecutable.toNativePath()} '
                 '${TestUtils.dartDir().toNativePath()}/tools/testing/dart/'
                 'http_server.dart -m ${test.configuration["mode"]} '
                 '-a ${test.configuration["arch"]} '
                 '-p ${http_server.TestingServerRunner.serverList[0].port} '
                 '-c ${http_server.TestingServerRunner.serverList[1].port} '
                 '--package-root='
@@ skipping 143 matching lines @@
           completer.complete(testCase);
         }
       });
     }
     runCommand();
 
     return completer.future;
   }
 }