Make PASS, FAIL, ERROR public (see issue 5365).

pkg/unittest/test_case.dart

 // Copyright (c) 2011, 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.
 
 /**
  * testcase.dart: this file is sourced by unittest.dart. It defines [TestCase]
  * and assumes unittest defines the type [TestFunction].
  */
 
 /** Summarizes information about a single test case. */
@@ skipping 22 matching lines @@
   /**
    * Remaining number of callbacks functions that must reach a 'done' state
    * to wait for before the test completes.
    */
   int callbackFunctionsOutstanding;
 
   /** Error or failure message. */
   String message = '';
 
   /**
-   * One of [_PASS], [_FAIL], [_ERROR], or [null] if the test hasn't run yet.
+   * One of [PASS], [FAIL], [ERROR], or [null] if the test hasn't run yet.
    */
   String result;
 
   /** Stack trace associated with this test, or null if it succeeded. */
   String stackTrace;
 
   /** The group (or groups) under which this test is running. */
   final String currentGroup;
 
   Date startTime;
@@ skipping 37 matching lines @@
     if (!_doneTeardown) {
       if (_tearDown != null) {
         _tearDown();
       }
       _doneTeardown = true;
     }
     _config.onTestResult(this);
   }
 
   void pass() {
-    result = _PASS;
+    result = PASS;
     _complete();
   }
 
   void fail(String messageText, String stack) {
     if (result != null) {
-      if (result == _PASS) {
+      if (result == PASS) {
         error('Test failed after initially passing: $messageText', stack);
-      } else if (result == _FAIL) {
+      } else if (result == FAIL) {
         error('Test failed more than once: $messageText', stack);
       }
     } else {
-      result = _FAIL;
+      result = FAIL;
       message = messageText;
       stackTrace = stack;
       _complete();
     }
   }
 
   void error(String messageText, String stack) {
-    result = _ERROR;
+    result = ERROR;
     message = messageText;
     stackTrace = stack;
     _complete();
   }
 }