// 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.

@TestOn("vm")

import 'package:path/path.dart' as p;
import 'package:test_descriptor/test_descriptor.dart' as d;

import 'package:test/src/backend/state.dart';
import 'package:test/src/backend/test.dart';
import 'package:test/src/backend/test_platform.dart';
import 'package:test/src/runner/configuration/suite.dart';
import 'package:test/src/runner/loader.dart';
import 'package:test/test.dart';

import '../utils.dart';

Loader _loader;

final _tests = """
import 'dart:async';

import 'package:test/test.dart';

void main() {
  test("success", () {});
  test("failure", () => throw new TestFailure('oh no'));
  test("error", () => throw 'oh no');
}
""";

void main() {
  setUp(() async {
    _loader = new Loader(root: d.sandbox);
  });

  tearDown(() => _loader.close());

  group(".loadFile()", () {
    var suite;
    setUp(() async {
      await d.file('a_test.dart', _tests).create();
      var suites = await _loader
          .loadFile(p.join(d.sandbox, 'a_test.dart'), SuiteConfiguration.empty)
          .toList();
      expect(suites, hasLength(1));
      var loadSuite = suites.first;
      suite = await loadSuite.getSuite();
    });

    test("returns a suite with the file path and platform", () {
      expect(suite.path, equals(p.join(d.sandbox, 'a_test.dart')));
      expect(suite.platform, equals(TestPlatform.vm));
    });

    test("returns entries with the correct names and platforms", () {
      expect(suite.group.entries, hasLength(3));
      expect(suite.group.entries[0].name, equals("success"));
      expect(suite.group.entries[1].name, equals("failure"));
      expect(suite.group.entries[2].name, equals("error"));
    });

    test("can load and run a successful test", () {
      var liveTest = suite.group.entries[0].load(suite);

      expectStates(liveTest, [
        const State(Status.running, Result.success),
        const State(Status.complete, Result.success)
      ]);
      expectErrors(liveTest, []);

      return liveTest.run().whenComplete(() => liveTest.close());
    });

    test("can load and run a failing test", () {
      var liveTest = suite.group.entries[1].load(suite);
      expectSingleFailure(liveTest);
      return liveTest.run().whenComplete(() => liveTest.close());
    });
  });

  group(".loadDir()", () {
    test("ignores non-Dart files", () async {
      await d.file('a_test.txt', _tests).create();
      expect(_loader.loadDir(d.sandbox, SuiteConfiguration.empty).toList(),
          completion(isEmpty));
    });

    test("ignores files in packages/ directories", () async {
      await d.dir('packages', [d.file('a_test.dart', _tests)]).create();
      expect(_loader.loadDir(d.sandbox, SuiteConfiguration.empty).toList(),
          completion(isEmpty));
    });

    test("ignores files that don't end in _test.dart", () async {
      await d.file('test.dart', _tests).create();
      expect(_loader.loadDir(d.sandbox, SuiteConfiguration.empty).toList(),
          completion(isEmpty));
    });

    group("with suites loaded from a directory", () {
      var suites;
      setUp(() async {
        await d.file('a_test.dart', _tests).create();
        await d.file('another_test.dart', _tests).create();
        await d.dir('dir', [d.file('sub_test.dart', _tests)]).create();

        suites = await _loader
            .loadDir(d.sandbox, SuiteConfiguration.empty)
            .asyncMap((loadSuite) => loadSuite.getSuite())
            .toList();
      });

      test("gives those suites the correct paths", () {
        expect(
            suites.map((suite) => suite.path),
            unorderedEquals([
              p.join(d.sandbox, 'a_test.dart'),
              p.join(d.sandbox, 'another_test.dart'),
              p.join(d.sandbox, 'dir', 'sub_test.dart')
            ]));
      });

      test("can run tests in those suites", () {
        var suite = suites.firstWhere((suite) => suite.path.contains("a_test"));
        var liveTest = suite.group.entries[1].load(suite);
        expectSingleFailure(liveTest);
        return liveTest.run().whenComplete(() => liveTest.close());
      });
    });
  });

  test("a print in a loaded file is piped through the LoadSuite", () async {
    await d.file('a_test.dart', """
      void main() {
        print('print within test');
      }
    """).create();
    var suites = await _loader
        .loadFile(p.join(d.sandbox, 'a_test.dart'), SuiteConfiguration.empty)
        .toList();
    expect(suites, hasLength(1));
    var loadSuite = suites.first;

    var liveTest = (loadSuite.group.entries.single as Test).load(loadSuite);
    expect(liveTest.onMessage.first.then((message) => message.text),
        completion(equals("print within test")));
    await liveTest.run();
    expectTestPassed(liveTest);
  });

  // TODO: Test load suites. Don't forget to test that prints in loaded files
  // are piped through the suite. Also for browser tests!
}