update the travis build

.gitignore

@@ -1,6 +1,7 @@
 .buildlog
 .DS_Store
 .idea
+.packages
 .pub/
 build/
 packages

.travis.yml

@@ -1,11 +1,14 @@
 language: dart
+# Speed up builds by using containerization.
+sudo: false
 env:
   global:
     # COVERALLS_TOKEN
     secure: aTnwsQmp/ngr1eXNVULJekdHhgvQq3PomunMOqeqA+5OY1MpSrdQgMigjT/VdjaMFe6mackHCR7sIhWcsiT2weZItVkeOYckT41ICrogP7bau7GgpcCjntHZ0byYN8MImbo/zJPZG3sh2iZwL2YFx+TjjHHkAbn7RovKeAmhMIM=
 dart:
 - stable
 - dev
+script: ./tool/travis.sh
 after_success:
   - pub global activate dart_coveralls
-  - pub global run dart_coveralls:dart_coveralls report --exclude-test-files --token $COVERALLS_TOKEN ./test/all_tests.dart
+  - pub global run dart_coveralls:dart_coveralls report --exclude-test-files --token $COVERALLS_TOKEN ./test/all_tests.dart

lib/src/util.dart

@@ -29,6 +29,7 @@ StreamController _createControllerLikeStream({Stream stream, void onListen(), vo
   }
 }
 
+// TODO: This is not used.
 Future _cancelSubscriptions(Iterable<StreamSubscription> subscriptions) {
   var futures = subscriptions
       .map((subscription) => subscription.cancel())

test/debounce_test.dart

@@ -2,7 +2,6 @@ library debounce_test;
 
 import 'dart:async';
 import 'package:guinness/guinness.dart';
-import 'package:unittest/unittest.dart' show expectAsync;
 import 'package:stream_transformers/stream_transformers.dart';
 import 'util.dart';
 
@@ -69,4 +68,4 @@ void testWithStreamController(StreamController provider()) {
     var stream = controller.stream.transform(new Debounce(duration));
     expect(stream.isBroadcast).toBe(controller.stream.isBroadcast);
   });
-}
+}

test/do_action_test.dart

@@ -2,7 +2,6 @@ library do_action_test;
 
 import 'dart:async';
 import 'package:guinness/guinness.dart';
-import 'package:unittest/unittest.dart' show expectAsync;
 import 'package:stream_transformers/stream_transformers.dart';
 import 'util.dart';
 
@@ -88,4 +87,4 @@ void testWithStreamController(StreamController provider()) {
     var stream = controller.stream.transform(new DoAction(null));
     expect(stream.isBroadcast).toBe(controller.stream.isBroadcast);
   });
-}
+}

test/sample_on_test.dart

@@ -2,7 +2,6 @@ library sample_on_test;
 
 import 'dart:async';
 import 'package:guinness/guinness.dart';
-import 'package:unittest/unittest.dart' show expectAsync;
 import 'package:stream_transformers/stream_transformers.dart';
 import 'util.dart';
 
@@ -96,4 +95,4 @@ void testWithStreamController(StreamController provider()) {
     var stream = controller.stream.transform(new SampleOn(trigger.stream));
     expect(stream.isBroadcast).toBe(controller.stream.isBroadcast);
   });
-}
+}

test/sample_periodically_test.dart

@@ -2,7 +2,6 @@ library sample_periodically_test;
 
 import 'dart:async';
 import 'package:guinness/guinness.dart';
-import 'package:unittest/unittest.dart' show expectAsync;
 import 'package:stream_transformers/stream_transformers.dart';
 import 'util.dart';
 
@@ -52,4 +51,4 @@ void testWithStreamController(StreamController provider()) {
     var stream = controller.stream.transform(new SampleOn(trigger.stream));
     expect(stream.isBroadcast).toBe(controller.stream.isBroadcast);
   });
-}
+}

test/scan_test.dart

@@ -3,7 +3,6 @@ library scan_test;
 import 'dart:async';
 import 'package:guinness/guinness.dart';
 import 'package:stream_transformers/stream_transformers.dart';
-import 'package:unittest/unittest.dart' show expectAsync;
 import 'util.dart';
 
 void main() => describe("Scan", () {
@@ -64,4 +63,4 @@ void testWithStreamController(StreamController provider()) {
     var stream = controller.stream.transform(new Scan(0, (a, b) => a + b));
     expect(stream.isBroadcast).toBe(controller.stream.isBroadcast);
   });
-}
+}

test/start_with_test.dart

@@ -2,7 +2,6 @@ library start_with_test;
 
 import 'dart:async';
 import 'package:guinness/guinness.dart';
-import 'package:unittest/unittest.dart' show expectAsync;
 import 'package:stream_transformers/stream_transformers.dart';
 import 'util.dart';
 
@@ -79,4 +78,4 @@ void testWithStreamController(StreamController provider()) {
     var stream = controller.stream.transform(new StartWith(1));
     expect(stream.isBroadcast).toBe(controller.stream.isBroadcast);
   });
-}
+}

tool/travis.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# Fast fail the script on failures.
+set -e
+
+# Verify that the libraries are error free.
+dartanalyzer --fatal-warnings \
+  lib/stream_transformers.dart \
+  test/all_tests.dart
+
+# Run the tests.
+dart -c test/all_tests.dart