Dart formatter babysteps.

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:analyzer_experimental/src/generated/ast.dart';
+import 'package:analyzer_experimental/src/services/formatter.dart';
+import 'package:analyzer_experimental/src/services/formatter_impl.dart';
+import 'package:unittest/unittest.dart';
+
+main() {
+
+  /// Edit recorder tests
+  group('edit recorder', () {

[messick, 2013/06/07 13:51:36]

I'd add a few tests that are expected to fail.

[pquitslund, 2013/06/07 19:45:01]

Will do.  Thanks!

+
+    test('countWhitespace', (){
+      expect(newRecorder('   ').countWhitespace(), equals(3));
+      expect(newRecorder('').countWhitespace(), equals(0));
+      expect(newRecorder('  foo').countWhitespace(), equals(2));
+    });
+
+    test('indent', (){
+      var recorder = newRecorder('');
+      expect(recorder.indentationLevel, equals(0));
+      expect(recorder.options.indentPerLevel, equals(2));
+      recorder.indent();
+      expect(recorder.indentationLevel, equals(2));
+      expect(recorder.numberOfIndentations, equals(1));
+    });
+
+    test('isNewlineAt', (){
+      expect(newRecorder('012\n').isNewlineAt(3), isTrue);
+      expect(newRecorder('012\n3456').isNewlineAt(3), isTrue);
+      expect(newRecorder('\n').isNewlineAt(0), isTrue);
+    });
+
+  });
+
+
+  /// Formatter tests
+  group('formatter', () {
+
+    test('failedParse', () {
+      var formatter = new CodeFormatter();
+      expect(() => formatter.format(CodeKind.COMPILATION_UNIT, "~"),
+                   throwsA(new isInstanceOf<FormatterException>('FE')));
+    });
+
+//    test('initialIndent', () {
+//      var formatter = new CodeFormatter(new Options(initialIndentationLevel:2));
+//      var formattedSource = formatter.format(CodeKind.STATEMENT, 'var x;');
+//      expect(formattedSource, startsWith('  '));
+//    });
+
+  });
+
+}
+
+EditRecorder newRecorder(String source) {
+  var recorder = new EditRecorder(new FormatterOptions());
+  recorder.source = source;
+  return recorder;
+}