Harvest from pub. Mostly a straight copy, except:

test/test_all.dart

Index: test/test_all.dart
diff --git a/test/test_all.dart b/test/test_all.dart
new file mode 100644
index 0000000000000000000000000000000000000000..533dde82e843134cc41e800bb6812f9e00c4f533
--- /dev/null
+++ b/test/test_all.dart
@@ -0,0 +1,17 @@
+// Copyright (c) 2014, 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.
+
+library pub_semver.test.test_all;
+
+import 'package:unittest/unittest.dart';
+
+import 'version_constraint_test.dart' as version_constraint_test;
+import 'version_range_test.dart' as version_range_test;
+import 'version_test.dart' as version_test;
+
+main() {
+  group('Version', version_test.main);
+  group('VersionConstraint', version_constraint_test.main);
+  group('VersionRange', version_range_test.main);
+}