Library dependency service tests.

pkg/analysis_server/test/services/dependencies/library_dependencies_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.
+
+library test.services.dependencies.library;
+
+import 'package:analysis_server/src/services/dependencies/library_dependencies.dart';
+import 'package:unittest/unittest.dart';
+
+import '../../abstract_context.dart';
+import '../../reflective_tests.dart';
+
+main() {
+  groupSep = ' | ';
+  runReflectiveTests(LibraryDependenciesTest);
+}
+
+
+@reflectiveTest
+class LibraryDependenciesTest extends AbstractContextTest {
+
+  test_Dependencies() {
+    addSource('/lib1.dart', '');
+    addSource('/lib2.dart', 'import "lib1.dart";');
+    addSource('/lib3.dart', 'import "lib2.dart";');
+    addSource('/lib4.dart', 'import "lib5.dart";');

[scheglov, 2015/01/22 22:26:45]

I would add a cycle to test that we don't get into an infinite loop.

[pquitslund, 2015/01/22 22:38:47]

Good idea!

+    provider.newFile('/lib5.dart', 'import "lib6.dart";');
+    provider.newFile('/lib6.dart', '');
+
+    _performAnalysis();
+
+    var libs =
+        new LibraryDependencyCollector([context]).collectLibraryDependencies();
+
+    // Sources
+    expect(libs, contains('/lib1.dart'));
+    expect(libs, contains('/lib2.dart'));
+    expect(libs, contains('/lib3.dart'));
+    expect(libs, contains('/lib4.dart'));
+    // Non-source, referenced by source
+    expect(libs, contains('/lib5.dart'));
+    // Non-source, referenced by non-source
+    expect(libs, contains('/lib6.dart'));
+  }
+
+  void _performAnalysis() {
+    while (context.performAnalysisTask().hasMoreWork);
+  }
+}
+