Rename BadNumberFormatException -> FormatException.

lib/unittest/unittest.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.
 
 /**
  * A library for writing dart unit tests.
  *
  * To import this library, specify the relative path to
  * lib/unittest/unittest.dart.
  *
@@ skipping 705 matching lines @@
 
 /**
  * Run [tryBody] guarded in a try-catch block. If an exception is thrown, update
  * the [_currentTest] status accordingly.
  */
 guardAsync(tryBody, [finallyBody, testNum = -1]) {
   if (testNum < 0) testNum = _currentTest;
   try {
     return tryBody();
   } catch (var e, var trace) {
-    registerException(testNum, e, trace);
+    _registerException(testNum, e, trace);
   } finally {
     if (finallyBody != null) finallyBody();
   }
 }
 
 /**
  * Registers that an exception was caught for the current test.
  */
-registerException(testNum, e, [trace]) {
+registerException(e, [trace]) {
+  _registerException(_currentTest, e, trace);
+}
+
+/**
+ * Registers that an exception was caught for the current test.
+ */
+_registerException(testNum, e, [trace]) {
   trace = trace == null ? '' : trace.toString();
   if (_tests[testNum].result == null) {
     String message = (e is ExpectException) ? e.message : 'Caught $e';
     _tests[testNum].fail(message, trace);
   } else {
     _tests[testNum].error('Caught $e', trace);
   }
   if (testNum == _currentTest) {
     _nextTestCase();
   }
@@ skipping 98 matching lines @@
 }
 
 /** Enable a test by ID. */
 void enableTest(int testId) => _setTestEnabledState(testId, true);
 
 /** Disable a test by ID. */
 void disableTest(int testId) => _setTestEnabledState(testId, false);
 
 /** Signature for a test function. */
 typedef void TestFunction();