Attempt to re-commit Dartdoc exports.

sdk/lib/_internal/dartdoc/test/utils_test.dart

+// Copyright (c) 2012, 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 '../lib/src/dartdoc/utils.dart';
+
+void main() {
+  group('countOccurrences', () {
+    test('empty text returns 0', () {
+      expect(countOccurrences('', 'needle'), equals(0));
+    });
+
+    test('one occurrence', () {
+      expect(countOccurrences('bananarama', 'nara'), equals(1));
+    });
+
+    test('multiple occurrences', () {
+      expect(countOccurrences('bananarama', 'a'), equals(5));
+    });
+
+    test('overlapping matches do not count', () {
+      expect(countOccurrences('bananarama', 'ana'), equals(1));
+    });
+  });
+
+  group('repeat', () {
+    test('zero times returns an empty string', () {
+      expect(repeat('ba', 0), isEmpty);
+    });
+
+    test('one time returns the string', () {
+      expect(repeat('ba', 1), equals('ba'));
+    });
+
+    test('multiple times', () {
+      expect(repeat('ba', 3), equals('bababa'));
+    });
+
+    test('multiple times with a separator', () {
+      expect(repeat('ba', 3, separator: ' '), equals('ba ba ba'));
+    });
+  });
+}