// 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.import_collector;

import 'package:analysis_server/src/services/dependencies/reachable_source_collector.dart';
import 'package:analyzer/src/generated/source.dart';
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

import '../../abstract_context.dart';

main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(ReachableSourceCollectorTest);
  });
}

@reflectiveTest
class ReachableSourceCollectorTest extends AbstractContextTest {
  Map<String, List<String>> importsFor(Source source) =>
      new ReachableSourceCollector(source, context).collectSources();

  test_null_context() {
    Source lib = addSource('/lib.dart', '');
    expect(() => new ReachableSourceCollector(lib, null),
        throwsA(new isInstanceOf<ArgumentError>()));
  }

  test_null_source() {
    expect(() => new ReachableSourceCollector(null, context),
        throwsA(new isInstanceOf<ArgumentError>()));
  }

  test_sources() {
    Source lib1 = addSource(
        '/lib1.dart',
        '''
import "lib2.dart";
import "dart:html";''');
    Source lib2 = addSource('/lib2.dart', 'import "lib1.dart";');

    Source lib3 = addSource('/lib3.dart', 'import "lib4.dart";');
    addSource('/lib4.dart', 'import "lib3.dart";');

    {
      Map<String, List<String>> imports = importsFor(lib1);
      expect(imports.keys, contains('file:///lib1.dart'));
      expect(imports.keys, contains('file:///lib2.dart'));
      expect(imports.keys, contains('dart:core'));
      expect(imports.keys, contains('dart:html'));
      expect(imports.keys, contains('dart:math'));
      expect(imports.keys, isNot(contains('file:///lib3.dart')));
      expect(imports['file:///lib1.dart'],
          unorderedEquals(['dart:core', 'dart:html', 'file:///lib2.dart']));
    }

    // Check transitivity.
    expect(importsFor(lib2).keys, contains('dart:html'));

    // Cycles should be OK.
    {
      Map<String, List<String>> imports = importsFor(lib3);
      expect(imports.keys, contains('file:///lib3.dart'));
      expect(imports.keys, contains('file:///lib4.dart'));
      expect(imports.keys, contains('dart:core'));
      expect(imports.keys, contains('dart:math'));
    }
  }
}