'Rename Constructor' refactoring.

pkg/analysis_services/test/correction/strings_test.dart

 // Copyright (c) 2014, 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.
 
 library test.services.correction.strings;
 
 import 'package:analysis_services/src/correction/strings.dart';
 import 'package:analysis_testing/reflective_tests.dart';
 import 'package:unittest/unittest.dart' hide isEmpty;
 
 
 
 main() {
   groupSep = ' | ';
   runReflectiveTests(StringsTest);
 }
 
 
 @ReflectiveTestCase()
 class StringsTest {
   void test_capitalize() {
-    expect(capitalize(null), null);
     expect(capitalize(''), '');
     expect(capitalize('a'), 'A');
     expect(capitalize('abc'), 'Abc');
     expect(capitalize('abc def'), 'Abc def');
     expect(capitalize('ABC'), 'ABC');
   }
 
   void test_compareStrings() {
     expect(compareStrings(null, null), 0);
     expect(compareStrings(null, 'b'), 1);
     expect(compareStrings('a', null), -1);
     expect(compareStrings('a', 'b'), -1);
     expect(compareStrings('b', 'a'), 1);
   }
 
+  void test_format() {
+    expect(format('Hello, {0}!', 'John'), 'Hello, John!');
+    expect(
+        format('{0} are you {1}ing?', 'What', 'read'),
+        'What are you reading?');
+  }
+
   void test_isBlank() {
     expect(isBlank(null), isTrue);
     expect(isBlank(''), isTrue);
     expect(isBlank(' '), isTrue);
     expect(isBlank('\t'), isTrue);
     expect(isBlank('  '), isTrue);
     expect(isBlank('X'), isFalse);
   }
 
   void test_isDigit() {
@@ skipping 89 matching lines @@
     expect(removeStart('abcTest', 'abc'), 'Test');
     expect(removeStart('my abcTest', 'abc'), 'my abcTest');
   }
 
   void test_repeat() {
     expect(repeat('x', 0), '');
     expect(repeat('x', 5), 'xxxxx');
     expect(repeat('abc', 3), 'abcabcabc');
   }
 }