add from option to run

test/initializer_from_test.dart

+// Copyright (c) 2015, 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.
+@initializeTracker
+library initialize.test.initializer_from_test;
+
+import 'package:initialize/src/initialize_tracker.dart';
+import 'package:initialize/initialize.dart';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/compact_vm_config.dart';
+import 'package:test_package/bar.dart'; // Used for annotations
+
+main() {
+  useCompactVMConfiguration();
+
+  test('The `from` option', () {
+    var expectedNames = [];
+    return run(from: Uri.parse('package:test_package/bar.dart')).then((_) {
+      // First just run on the test packages bar.dart file.
+      expectedNames.add(const LibraryIdentifier(
+          #test_package.bar, 'test_package', 'bar.dart'));
+      expect(InitializeTracker.seen, expectedNames);
+    }).then((_) => run()).then((_) {
+      // Now we run on the rest (just this file).
+      expectedNames.add(const LibraryIdentifier(
+          #initialize.test.initializer_from_test, null,
+          'initializer_from_test.dart'));
+      expect(InitializeTracker.seen, expectedNames);
+    });
+  });
+}