Minor formatter tweaks and a few more tests.

pkg/analyzer_experimental/test/services/formatter_test.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.
 
 import 'package:unittest/unittest.dart';
 
 import 'package:analyzer_experimental/src/generated/scanner.dart';
 import 'package:analyzer_experimental/src/services/formatter_impl.dart';
 import 'package:analyzer_experimental/src/services/writer.dart';
 
@@ skipping 49 matching lines @@
     });
 
     test('CU (5)', () {
       expectCUFormatsTo(
           'class A  { int meaningOfLife() => 42; }',
           'class A {\n'
           '  int meaningOfLife() => 42;\n'
           '}'
       );
     });
-    
-    
+
+
 //    test('CU - comments', () {
 //      expectCUFormatsTo(
 //          'library foo;\n'
 //          '\n'
 //          '//comment one\n\n'
 //          '//comment two\n\n'
 //          'class C {\n}\n',
 //          'library foo;\n'
 //          '\n'
 //          '//comment one\n\n'
 //          '//comment two\n\n'
 //          'class C {\n}\n'
 //      );
 //    });
-    
+
     test('CU - top level', () {
       expectCUFormatsTo(
           '\n\n'
           'foo() {\n'
           '}\n'
           'bar() {\n'
           '}\n',
           '\n\n'
           'foo() {\n'
           '}\n'
           'bar() {\n'
           '}\n'
       );
       expectCUFormatsTo(
           'const A = 42;\n'
           'final foo = 32;\n',
           'const A = 42;\n'
           'final foo = 32;\n'
       );
     });
-    
+
     test('CU - imports', () {
       expectCUFormatsTo(
           'import "dart:io";\n\n'
           'import "package:unittest/unittest.dart";\n'
           'foo() {\n'
           '}\n',
           'import "dart:io";\n\n'
           'import "package:unittest/unittest.dart";\n'
           'foo() {\n'
           '}\n'
       );
     });
-    
+
     test('CU - method invocations', () {
       expectCUFormatsTo(
           'class A {\n'
           '  foo() {\n'
           '    bar();\n'
           '    for (int i = 0; i < 42; i++) {\n'
           '      baz();\n'
           '    }\n'
           '  }\n'
           '}\n',
@@ skipping 48 matching lines @@
           '}\n',
           'class A {\n'
           '  foo(files) {\n'
           '    for (var file in files) {\n'
           '      print(file);\n'
           '    }\n'
           '  }\n'
           '}\n'
       );
     });
-    
+
     test('CU (method indent)', () {
       expectCUFormatsTo(
           'class A {\n'
           'void x(){\n'
           '}\n'
           '}\n',
           'class A {\n'
           '  void x() {\n'
           '  }\n'
           '}\n'
@@ skipping 69 matching lines @@
           '  int c() => b();\n\n'
           '}\n',
           'class A {\n'
           '}\n\n'
           'class B {\n\n\n'
           '  int b() => 42;\n\n'
           '  int c() => b();\n\n'
           '}\n'
       );
     });
-    
+
     test('CU - constructor', () {
       expectCUFormatsTo(
           'class A {\n'
           '  const _a;\n'
           '  A();\n'
           '  int a() => _a;\n'
           '}\n',
           'class A {\n'
           '  const _a;\n'
           '  A();\n'
           '  int a() => _a;\n'
           '}\n'
         );
     });
 
     test('CU - method decl w/ named params', () {
       expectCUFormatsTo(
           'class A {\n'
           '  int a(var x, {optional: null}) => null;\n'
           '}\n',
           'class A {\n'
           '  int a(var x, {optional: null}) => null;\n'
           '}\n'
         );
     });
-    
+
     test('CU - method decl w/ optional params', () {
       expectCUFormatsTo(
           'class A {\n'
           '  int a(var x, [optional = null]) => null;\n'
           '}\n',
           'class A {\n'
           '  int a(var x, [optional = null]) => null;\n'
           '}\n'
         );
     });
-    
+
     test('CU - factory constructor redirects', () {
       expectCUFormatsTo(
           'class A {\n'
           '  const factory A() = B;\n'
           '}\n',
           'class A {\n'
           '  const factory A() = B;\n'
           '}\n'
         );
     });
-    
+
     test('CU - constructor initializers', () {
       expectCUFormatsTo(
           'class A {\n'
           '  int _a;\n'
           '  A(a) : _a = a;\n'
           '}\n',
           'class A {\n'
           '  int _a;\n'
           '  A(a) : _a = a;\n'
           '}\n'
         );
     });
-    
+
+    test('CU - constructor auto field inits', () {
+      expectCUFormatsTo(
+          'class A {\n'
+          '  int _a;\n'
+          '  A(this._a);\n'
+          '}\n',
+          'class A {\n'
+          '  int _a;\n'
+          '  A(this._a);\n'
+          '}\n'
+        );
+    });
+
+    test('CU - parts', () {
+      expectCUFormatsTo(
+        'part of foo;',
+        'part of foo;'
+      );
+    });
+
     test('stmt', () {
       expectStmtFormatsTo(
          'if (true){\n'
          'if (true){\n'
          'if (true){\n'
          'return true;\n'
          '} else{\n'
          'return false;\n'
          '}\n'
          '}\n'
@@ skipping 27 matching lines @@
         'switch (fruit) {\n'
         '  case "apple":\n'
         '    print("delish");\n'
         '    break;\n'
         '  case "fig":\n'
         '    print("bleh");\n'
         '    break;\n'
         '}'
       );
     });
-  
+
     test('stmt (generics)', () {
       expectStmtFormatsTo(
         'var numbers = <int>[1, 2, (3 + 4)];',
         'var numbers = <int>[1, 2, (3 + 4)];'
       );
     });
-    
+
     test('stmt (try/catch)', () {
       expectStmtFormatsTo(
         'try {\n'
         'doSomething();\n'
         '} catch (e) {\n'
         'print(e);\n'
         '}',
         'try {\n'
         '  doSomething();\n'
         '} catch (e) {\n'
         '  print(e);\n'
         '}'
       );
     });
-    
+
     test('stmt (binary/ternary ops)', () {
       expectStmtFormatsTo(
         'var a = 1 + 2 / (3 * -b);',
         'var a = 1 + 2 / (3 * -b);'
       );
       expectStmtFormatsTo(
         'var c = !condition == a > b;',
         'var c = !condition == a > b;'
       );
       expectStmtFormatsTo(
         'var d = condition ? b : object.method(a, b, c);',
         'var d = condition ? b : object.method(a, b, c);'
       );
       expectStmtFormatsTo(
         'var d = obj is! SomeType;',
         'var d = obj is! SomeType;'
       );
     });
-    
+
+    test('stmt (for in)', () {
+      expectStmtFormatsTo(
+        'for (Foo foo in bar.foos) {\n'
+        '  print(foo);\n'
+        '}',
+        'for (Foo foo in bar.foos) {\n'
+        '  print(foo);\n'
+        '}'
+      );
+      expectStmtFormatsTo(
+        'for (final Foo foo in bar.foos) {\n'
+        '  print(foo);\n'
+        '}',
+        'for (final Foo foo in bar.foos) {\n'
+        '  print(foo);\n'
+        '}'
+      );
+      expectStmtFormatsTo(
+        'for (final foo in bar.foos) {\n'
+        '  print(foo);\n'
+        '}',
+        'for (final foo in bar.foos) {\n'
+        '  print(foo);\n'
+        '}'
+      );
+    });
+
     test('initialIndent', () {
       var formatter = new CodeFormatter(
           new FormatterOptions(initialIndentationLevel: 2));
       var formattedSource = formatter.format(CodeKind.STATEMENT, 'var x;');
       expect(formattedSource, startsWith('    '));
     });
 
   });
 
 
@@ skipping 122 matching lines @@
 String formatCU(src, {options: const FormatterOptions()}) =>
     new CodeFormatter(options).format(CodeKind.COMPILATION_UNIT, src);
 
 String formatStatement(src, {options: const FormatterOptions()}) =>
     new CodeFormatter(options).format(CodeKind.STATEMENT, src);
 
 expectCUFormatsTo(src, expected) => expect(formatCU(src), equals(expected));
 
 expectStmtFormatsTo(src, expected) => expect(formatStatement(src),
     equals(expected));