pkg/unittest: eliminate unneeded var

pkg/unittest/lib/unittest.dart

 // Copyright (c) 2013, 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, install the
  * [unittest package](http://pub.dartlang.org/packages/unittest) via the pub
  * package manager. See the [Getting Started](http://pub.dartlang.org/doc)
@@ skipping 180 matching lines @@
 
 /** Separator used between group names and test names. */
 String groupSep = ' ';
 
 /** Tests executed in this suite. */
 List<TestCase> _tests;
 
 /** Get the list of tests. */
 List<TestCase> get testCases => _tests;
 
-/**
- * Callback used to run tests. Entrypoints can replace this with their own
- * if they want.
- */
-Function _testRunner;
-
 /** Setup function called before each test in a group */
 Function _testSetup;
 
 /** Teardown function called after each test in a group */
 Function _testTeardown;
 
 /** Current test being executed. */
 int _currentTest = 0;
 TestCase _currentTestCase;
 
@@ skipping 414 matching lines @@
  * case it must return a [Future].
  */
 void tearDown(Function teardownTest) {
   _testTeardown = teardownTest;
 }
 
 /** Advance to the next test case. */
 void _nextTestCase() {
   _defer(() {
     _currentTest++;
-    _testRunner();
+    _nextBatch();
   });
 }
 
 /**
  * Utility function that can be used to notify the test framework that an
  *  error was caught outside of this library.
  */
 void _reportTestError(String msg, String trace) {
  if (_currentTest < _tests.length) {
     final testCase = _tests[_currentTest];
@@ skipping 46 matching lines @@
   _currentGroup = '';
 
   // If we are soloing a test, remove all the others.
   if (_soloTest != null) {
     filterTests((t) => t == _soloTest);
   }
 
   _config.onStart();
 
   _defer(() {
-    _testRunner();
+    _nextBatch();
   });
 }
 
 /**
  * Run [tryBody] guarded in a try-catch block. If an exception is thrown, it is
  * passed to the corresponding test.
  *
  * The value returned by [tryBody] (if any) is returned by [guardAsync].
  */
 guardAsync(Function tryBody) {
@@ skipping 14 matching lines @@
 /**
  * Registers that an exception was caught for the current test.
  */
 void registerException(e, [trace]) {
   _registerException(_currentTest, e, trace);
 }
 
 /**
  * Registers that an exception was caught for the current test.
  */
-_registerException(testNum, e, [trace]) {
+void _registerException(testNum, e, [trace]) {
   trace = trace == null ? '' : trace.toString();
   String message = (e is TestFailure) ? e.message : 'Caught $e';
   if (_tests[testNum].result == null) {
     _tests[testNum].fail(message, trace);
   } else {
     _tests[testNum].error(message, trace);
   }
 }
 
 /**
  * Runs a batch of tests, yielding whenever an asynchronous test starts
  * running. Tests will resume executing when such asynchronous test calls
  * [done] or if it fails with an exception.
  */
-_nextBatch() {
+void _nextBatch() {
   while (true) {
     if (_currentTest >= _tests.length) {
       _completeTests();
       break;
     }
     final testCase = _tests[_currentTest];
     var f = _guardAsync(testCase._run, null, _currentTest);
     if (f != null) {
       f.whenComplete(() {
         _nextTestCase(); // Schedule the next test.
       });
       break;
     }
     _currentTest++;
   }
 }
 
 /** Publish results on the page and notify controller. */
-_completeTests() {
+void _completeTests() {
   if (!_initialized) return;
   int passed = 0;
   int failed = 0;
   int errors = 0;
 
   for (TestCase t in _tests) {
     switch (t.result) {
       case PASS:  passed++; break;
       case FAIL:  failed++; break;
       case ERROR: errors++; break;
@@ skipping 15 matching lines @@
  */
 void ensureInitialized() {
   if (_initialized) {
     return;
   }
   _initialized = true;
   // Hook our async guard into the matcher library.
   wrapAsync = (f, [id]) => expectAsync1(f, id: id);
 
   _tests = <TestCase>[];
-  _testRunner = _nextBatch;
   _uncaughtErrorMessage = null;
 
   if (_config == null) {
     _config = new Configuration();
   }
   _config.onInit();
 
   if (_config.autoStart) {
     // Immediately queue the suite up. It will run after a timeout (i.e. after
     // main() has returned).
@@ skipping 27 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 dynamic TestFunction();