add coveralls support

test/asset/file_based_test.dart

@@ -12,7 +12,7 @@ import '../common/common.dart';
 
 final packageGraph = new PackageGraph.forPath('test/fixtures/basic_pkg');
 
-main() async {
+main() {
 
   group('FileBasedAssetReader', () {
     final reader = new FileBasedAssetReader(packageGraph);

test/package_graph/package_graph_test.dart

@@ -6,7 +6,7 @@ import 'package:test/test.dart';
 
 import 'package:build/build.dart';
 
-main() async {
+main() {
   PackageGraph graph;
 
   group('forThisPackage ', () {

tool/create_test_all.dart

@@ -0,0 +1,35 @@
+// Copyright (c) 2016, 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 'dart:io';
+
+import 'package:glob/glob.dart';
+
+main() async {
+  var imports = new StringBuffer();
+  var groupCalls = new StringBuffer();
+  var i = 0;
+  await for (var file in _testGlob.list(followLinks: false)) {
+    imports.writeln('import \'../${file.path}\' as i$i;');
+    groupCalls.writeln('  group(\'${file.path}\', i$i.main);');
+    i++;
+  }
+
+  var file = new File('tool/test_all.dart');
+  await file.writeAsString('''
+$_header
+$imports
+main() {
+$groupCalls
+}
+  ''');
+}
+
+Glob _testGlob = new Glob('test/**/*_test.dart');
+
+const _header = '''
+// Copyright (c) 2016, 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:test/test.dart';
+''';

tool/travis.sh

@@ -13,3 +13,14 @@ dartanalyzer --fatal-warnings \
 
 # Run the tests.
 pub run test
+
+# Install dart_coveralls; gather and send coverage data.
+if [ "$COVERALLS_TOKEN" ] && [ "$TRAVIS_DART_VERSION" = "stable" ]; then
+  dart tool/create_test_all.dart
+  pub global activate dart_coveralls
+  pub global run dart_coveralls report \
+    --retry 2 \
+    --exclude-test-files \
+    tool/test_all.dart
+  rm tool/test_all.dart
+fi