// Copyright (c) 2018, 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.

import 'package:analyzer/dart/analysis/context_root.dart';
import 'package:analyzer/file_system/file_system.dart';
import 'package:analyzer/src/dart/analysis/context_locator.dart';
import 'package:analyzer/src/test_utilities/package_config_file_builder.dart';
import 'package:analyzer/src/test_utilities/resource_provider_mixin.dart';
import 'package:analyzer/src/workspace/basic.dart';
import 'package:analyzer/src/workspace/bazel.dart';
import 'package:analyzer/src/workspace/pub.dart';
import 'package:analyzer/src/workspace/workspace.dart';
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

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

@reflectiveTest
class ContextLocatorImplTest with ResourceProviderMixin {
  late final ContextLocatorImpl contextLocator;

  ContextRoot findRoot(List<ContextRoot> roots, Resource rootFolder) {
    for (ContextRoot root in roots) {
      if (root.root == rootFolder) {
        return root;
      }
    }
    StringBuffer buffer = StringBuffer();
    buffer.write('Could not find "');
    buffer.write(rootFolder.path);
    buffer.write('" in');
    for (ContextRoot root in roots) {
      buffer.writeln();
      buffer.write('  ');
      buffer.write(root.root);
    }
    fail(buffer.toString());
  }

  void setUp() {
    contextLocator = ContextLocatorImpl(resourceProvider: resourceProvider);
  }

  void test_locateRoots_link_file_toOutOfRoot() {
    Folder rootFolder = newFolder('/home/test');
    newFile('/home/test/lib/a.dart');
    newFile('/home/b.dart');
    resourceProvider.newLink(
      convertPath('/home/test/lib/c.dart'),
      convertPath('/home/b.dart'),
    );

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, isNull);
    expect(root.packagesFile, isNull);

    _assertAnalyzedFiles(root, [
      '/home/test/lib/a.dart',
      '/home/test/lib/c.dart',
    ]);
  }

  void test_locateRoots_link_file_toSiblingInRoot() {
    Folder rootFolder = newFolder('/test');
    newFile('/test/lib/a.dart');
    resourceProvider.newLink(
      convertPath('/test/lib/b.dart'),
      convertPath('/test/lib/a.dart'),
    );

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, isNull);
    expect(root.packagesFile, isNull);

    _assertAnalyzedFiles(root, [
      '/test/lib/a.dart',
      '/test/lib/b.dart',
    ]);
  }

  void test_locateRoots_link_folder_toParentInRoot() {
    Folder rootFolder = newFolder('/test');
    newFile('/test/lib/a.dart');
    resourceProvider.newLink(
      convertPath('/test/lib/foo'),
      convertPath('/test/lib'),
    );

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, isNull);
    expect(root.packagesFile, isNull);

    _assertAnalyzedFiles(root, ['/test/lib/a.dart']);

    _assertAnalyzed(root, [
      '/test/lib/a.dart',
      '/test/lib/foo/b.dart',
    ]);
  }

  void test_locateRoots_link_folder_toParentOfRoot() {
    Folder rootFolder = newFolder('/home/test');
    newFile('/home/test/lib/a.dart');
    newFile('/home/b.dart');
    newFile('/home/other/c.dart');
    resourceProvider.newLink(
      convertPath('/home/test/lib/foo'),
      convertPath('/home'),
    );

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, isNull);
    expect(root.packagesFile, isNull);

    // The set of analyzed files includes everything in `/home`,
    // but does not repeat `/home/test/lib/a.dart` and does not cycle.
    _assertAnalyzedFiles(root, [
      '/home/test/lib/a.dart',
      '/home/test/lib/foo/b.dart',
      '/home/test/lib/foo/other/c.dart',
    ]);
  }

  void test_locateRoots_link_folder_toSiblingInRoot() {
    Folder rootFolder = newFolder('/test');
    newFile('/test/lib/a.dart');
    newFile('/test/lib/foo/b.dart');
    resourceProvider.newLink(
      convertPath('/test/lib/bar'),
      convertPath('/test/lib/foo'),
    );

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, isNull);
    expect(root.packagesFile, isNull);

    _assertAnalyzedFiles(root, [
      '/test/lib/a.dart',
      '/test/lib/foo/b.dart',
      '/test/lib/bar/b.dart',
    ]);
  }

  void test_locateRoots_multiple_dirAndNestedDir() {
    Folder outerRootFolder = newFolder('/test/outer');
    File outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    File outerPackagesFile = newDotPackagesFile('/test/outer');
    Folder innerRootFolder = newFolder('/test/outer/examples/inner');

    List<ContextRoot> roots = contextLocator.locateRoots(
        includedPaths: [outerRootFolder.path, innerRootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, isEmpty);
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);
  }

  void test_locateRoots_multiple_dirAndNestedDir_excludedByOptions() {
    var rootPath = convertPath('/home/test');
    var rootFolder = newFolder(rootPath);
    var optionsFile = newAnalysisOptionsYamlFile(rootPath, content: r'''
analyzer:
  exclude:
    - examples/**
''');
    var packagesFile = newPackageConfigJsonFile(rootPath);
    var includedFolder = newFolder('$rootPath/examples/included');
    newFolder('$rootPath/examples/not_included'); // not used

    List<ContextRoot> roots = contextLocator
        .locateRoots(includedPaths: [rootFolder.path, includedFolder.path]);
    expect(roots, hasLength(1));

    var outerRoot = findRoot(roots, rootFolder);
    expect(
      outerRoot.includedPaths,
      unorderedEquals([rootFolder.path, includedFolder.path]),
    );
    expect(outerRoot.excludedPaths, isEmpty);
    expect(outerRoot.optionsFile, optionsFile);
    expect(outerRoot.packagesFile, packagesFile);
  }

  void test_locateRoots_multiple_dirAndNestedFile() {
    Folder outerRootFolder = newFolder('/test/outer');
    File outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    File outerPackagesFile = newDotPackagesFile('/test/outer');
    File testFile = newFile('/test/outer/examples/inner/test.dart');

    List<ContextRoot> roots = contextLocator
        .locateRoots(includedPaths: [outerRootFolder.path, testFile.path]);
    expect(roots, hasLength(1));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, isEmpty);
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);
  }

  void test_locateRoots_multiple_dirAndNestedFile_excludedByOptions() {
    var rootPath = convertPath('/home/test');
    var rootFolder = newFolder(rootPath);
    var optionsFile = newAnalysisOptionsYamlFile(rootPath, content: r'''
analyzer:
  exclude:
    - lib/f*.dart
''');
    var packagesFile = newPackageConfigJsonFile(rootPath);
    var fooFile = newFile('$rootPath/lib/foo.dart');
    newFile('$rootPath/lib/far.dart'); // not used
    var barFile = newFile('$rootPath/lib/bar.dart');

    var roots = contextLocator.locateRoots(
      includedPaths: [rootFolder.path, fooFile.path],
    );
    expect(roots, hasLength(1));

    var root = findRoot(roots, rootFolder);
    expect(
      root.includedPaths,
      unorderedEquals([rootFolder.path, fooFile.path]),
    );
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, optionsFile);
    expect(root.packagesFile, packagesFile);

    _assertAnalyzedFiles2(root, [optionsFile, fooFile, barFile]);
  }

  void test_locateRoots_multiple_dirAndSiblingDir() {
    Folder outer1RootFolder = newFolder('/test/outer1');
    File outer1OptionsFile = newAnalysisOptionsYamlFile('/test/outer1');
    File outer1PackagesFile = newDotPackagesFile('/test/outer1');

    Folder outer2RootFolder = newFolder('/test/outer2');
    File outer2OptionsFile = newAnalysisOptionsYamlFile('/test/outer2');
    File outer2PackagesFile = newDotPackagesFile('/test/outer2');

    List<ContextRoot> roots = contextLocator.locateRoots(
        includedPaths: [outer1RootFolder.path, outer2RootFolder.path]);
    expect(roots, hasLength(2));

    ContextRoot outer1Root = findRoot(roots, outer1RootFolder);
    expect(outer1Root.includedPaths, unorderedEquals([outer1RootFolder.path]));
    expect(outer1Root.excludedPaths, isEmpty);
    expect(outer1Root.optionsFile, outer1OptionsFile);
    expect(outer1Root.packagesFile, outer1PackagesFile);

    ContextRoot outer2Root = findRoot(roots, outer2RootFolder);
    expect(outer2Root.includedPaths, unorderedEquals([outer2RootFolder.path]));
    expect(outer2Root.excludedPaths, isEmpty);
    expect(outer2Root.optionsFile, outer2OptionsFile);
    expect(outer2Root.packagesFile, outer2PackagesFile);
  }

  void test_locateRoots_multiple_dirAndSiblingFile() {
    Folder outer1RootFolder = newFolder('/test/outer1');
    File outer1OptionsFile = newAnalysisOptionsYamlFile('/test/outer1');
    File outer1PackagesFile = newDotPackagesFile('/test/outer1');

    File outer2OptionsFile = newAnalysisOptionsYamlFile('/test/outer2');
    File outer2PackagesFile = newDotPackagesFile('/test/outer2');
    File testFile = newFile('/test/outer2/test.dart');

    List<ContextRoot> roots = contextLocator
        .locateRoots(includedPaths: [outer1RootFolder.path, testFile.path]);
    expect(roots, hasLength(2));

    ContextRoot outer1Root = findRoot(roots, outer1RootFolder);
    expect(outer1Root.includedPaths, unorderedEquals([outer1RootFolder.path]));
    expect(outer1Root.excludedPaths, isEmpty);
    expect(outer1Root.optionsFile, outer1OptionsFile);
    expect(outer1Root.packagesFile, outer1PackagesFile);

    ContextRoot outer2Root = findRoot(roots, testFile.parent2);
    expect(outer2Root.includedPaths, unorderedEquals([testFile.path]));
    expect(outer2Root.excludedPaths, isEmpty);
    expect(outer2Root.optionsFile, outer2OptionsFile);
    expect(outer2Root.packagesFile, outer2PackagesFile);
  }

  /// Even if a file is excluded by the options, when it is explicitly included
  /// into analysis, it should be analyzed.
  void test_locateRoots_multiple_fileAndSiblingFile_excludedByOptions() {
    File optionsFile = newAnalysisOptionsYamlFile('/home/test', content: r'''
analyzer:
  exclude:
    - lib/test2.dart
''');
    File packagesFile = newDotPackagesFile('/home/test');
    File testFile1 = newFile('/home/test/lib/test1.dart');
    File testFile2 = newFile('/home/test/lib/test2.dart');

    List<ContextRoot> roots = contextLocator
        .locateRoots(includedPaths: [testFile1.path, testFile2.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, getFolder('/home/test'));
    expect(
        root.includedPaths, unorderedEquals([testFile1.path, testFile2.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, optionsFile);
    expect(root.packagesFile, packagesFile);

    _assertAnalyzedFiles2(root, [testFile1, testFile2]);
  }

  void test_locateRoots_multiple_fileAndSiblingFile_hasOptions() {
    File optionsFile = newAnalysisOptionsYamlFile('/home/test');
    File testFile1 = newFile('/home/test/lib/test1.dart');
    File testFile2 = newFile('/home/test/lib/test2.dart');

    List<ContextRoot> roots = contextLocator
        .locateRoots(includedPaths: [testFile1.path, testFile2.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, getFolder('/home/test'));
    expect(
        root.includedPaths, unorderedEquals([testFile1.path, testFile2.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, optionsFile);
    expect(root.packagesFile, isNull);

    _assertAnalyzedFiles2(root, [testFile1, testFile2]);
  }

  void
      test_locateRoots_multiple_fileAndSiblingFile_hasOptions_overrideOptions() {
    newAnalysisOptionsYamlFile('/home/test'); // not used
    File overrideOptionsFile = newAnalysisOptionsYamlFile('/home');
    File testFile1 = newFile('/home/test/lib/test1.dart');
    File testFile2 = newFile('/home/test/lib/test2.dart');

    List<ContextRoot> roots = contextLocator.locateRoots(
      includedPaths: [testFile1.path, testFile2.path],
      optionsFile: overrideOptionsFile.path,
    );
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, getFolder('/'));
    expect(
        root.includedPaths, unorderedEquals([testFile1.path, testFile2.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, overrideOptionsFile);
    expect(root.packagesFile, isNull);

    _assertAnalyzedFiles2(root, [testFile1, testFile2]);
  }

  void test_locateRoots_multiple_fileAndSiblingFile_hasOptionsPackages() {
    File optionsFile = newAnalysisOptionsYamlFile('/home/test');
    File packagesFile = newDotPackagesFile('/home/test');
    File testFile1 = newFile('/home/test/lib/test1.dart');
    File testFile2 = newFile('/home/test/lib/test2.dart');

    List<ContextRoot> roots = contextLocator
        .locateRoots(includedPaths: [testFile1.path, testFile2.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, getFolder('/home/test'));
    expect(
        root.includedPaths, unorderedEquals([testFile1.path, testFile2.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, optionsFile);
    expect(root.packagesFile, packagesFile);

    _assertAnalyzedFiles2(root, [testFile1, testFile2]);
  }

  void test_locateRoots_multiple_fileAndSiblingFile_hasPackages() {
    File packagesFile = newDotPackagesFile('/home/test');
    File testFile1 = newFile('/home/test/lib/test1.dart');
    File testFile2 = newFile('/home/test/lib/test2.dart');

    List<ContextRoot> roots = contextLocator
        .locateRoots(includedPaths: [testFile1.path, testFile2.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, getFolder('/home/test'));
    expect(
        root.includedPaths, unorderedEquals([testFile1.path, testFile2.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, isNull);
    expect(root.packagesFile, packagesFile);

    _assertAnalyzedFiles2(root, [testFile1, testFile2]);
  }

  /// When there is a packages file in a containing directory, that would
  /// control analysis of the files, but we provide an override, we ignore
  /// the don't look into containing directories, so the context root can be
  /// just the file system root.
  void
      test_locateRoots_multiple_fileAndSiblingFile_hasPackages_overridePackages() {
    newDotPackagesFile('/home/test'); // not used
    File overridePackagesFile = newDotPackagesFile('/home');
    File testFile1 = newFile('/home/test/lib/test1.dart');
    File testFile2 = newFile('/home/test/lib/test2.dart');

    List<ContextRoot> roots = contextLocator.locateRoots(
      includedPaths: [testFile1.path, testFile2.path],
      packagesFile: overridePackagesFile.path,
    );
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, getFolder('/'));
    expect(
        root.includedPaths, unorderedEquals([testFile1.path, testFile2.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, isNull);
    expect(root.packagesFile, overridePackagesFile);

    _assertAnalyzedFiles2(root, [testFile1, testFile2]);
  }

  /// When there are no configuration files, we can use the root of the file
  /// system, because it contains all the files.
  void test_locateRoots_multiple_fileAndSiblingFile_noConfigurationFiles() {
    File testFile1 = newFile('/home/test/lib/test1.dart');
    File testFile2 = newFile('/home/test/lib/test2.dart');

    List<ContextRoot> roots = contextLocator
        .locateRoots(includedPaths: [testFile1.path, testFile2.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, getFolder('/'));
    expect(
        root.includedPaths, unorderedEquals([testFile1.path, testFile2.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, isNull);
    expect(root.packagesFile, isNull);
    _assertBasicWorkspace(root.workspace, root.root.path);

    _assertAnalyzedFiles2(root, [testFile1, testFile2]);
  }

  void test_locateRoots_multiple_files_bazel_differentWorkspaces() {
    var workspacePath1 = '/home/workspace1';
    var workspacePath2 = '/home/workspace2';
    var pkgPath1 = '$workspacePath1/pkg1';
    var pkgPath2 = '$workspacePath2/pkg2';

    newFile('$workspacePath1/WORKSPACE');
    newFile('$workspacePath2/WORKSPACE');
    newBazelBuildFile(pkgPath1, '');
    newBazelBuildFile(pkgPath2, '');

    var file1 = newFile('$pkgPath1/lib/file1.dart');
    var file2 = newFile('$pkgPath2/lib/file2.dart');

    var roots = contextLocator.locateRoots(
      includedPaths: [file1.path, file2.path],
    );
    expect(roots, hasLength(2));

    var root1 = findRoot(roots, getFolder(workspacePath1));
    expect(root1.includedPaths, unorderedEquals([file1.path]));
    expect(root1.excludedPaths, isEmpty);
    expect(root1.optionsFile, isNull);
    expect(root1.packagesFile, isNull);
    _assertBazelWorkspace(root1.workspace, workspacePath1);
    _assertAnalyzedFiles2(root1, [file1]);

    var root2 = findRoot(roots, getFolder(workspacePath2));
    expect(root2.includedPaths, unorderedEquals([file2.path]));
    expect(root2.excludedPaths, isEmpty);
    expect(root2.optionsFile, isNull);
    expect(root2.packagesFile, isNull);
    _assertBazelWorkspace(root2.workspace, workspacePath2);
    _assertAnalyzedFiles2(root2, [file2]);
  }

  void test_locateRoots_multiple_files_bazel_sameWorkspace_differentPackages() {
    var workspacePath = '/home/workspace';
    var fooPath = '$workspacePath/foo';
    var barPath = '$workspacePath/bar';

    newFile('$workspacePath/WORKSPACE');
    newBazelBuildFile(fooPath, '');
    newBazelBuildFile(barPath, '');

    var fooFile = newFile('$fooPath/lib/foo.dart');
    var barFile = newFile('$barPath/lib/bar.dart');

    var roots = contextLocator.locateRoots(
      includedPaths: [fooFile.path, barFile.path],
    );
    expect(roots, hasLength(1));

    var root = findRoot(roots, getFolder(workspacePath));
    expect(root.includedPaths, unorderedEquals([fooFile.path, barFile.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, isNull);
    expect(root.packagesFile, isNull);
    _assertBazelWorkspace(root.workspace, workspacePath);
    _assertAnalyzedFiles2(root, [fooFile, barFile]);
  }

  void test_locateRoots_multiple_files_differentWorkspaces_pub() {
    var rootPath = '/home';
    var fooPath = '$rootPath/foo';
    var barPath = '$rootPath/bar';

    newPubspecYamlFile(fooPath, '');
    newPubspecYamlFile(barPath, '');

    var fooFile = newFile('$fooPath/lib/foo.dart');
    var barFile = newFile('$barPath/lib/bar.dart');

    var roots = contextLocator.locateRoots(
      includedPaths: [fooFile.path, barFile.path],
    );
    expect(roots, hasLength(2));

    var fooRoot = findRoot(roots, getFolder(fooPath));
    expect(fooRoot.includedPaths, unorderedEquals([fooFile.path]));
    expect(fooRoot.excludedPaths, isEmpty);
    expect(fooRoot.optionsFile, isNull);
    expect(fooRoot.packagesFile, isNull);
    _assertPubWorkspace(fooRoot.workspace, fooPath);
    _assertAnalyzedFiles2(fooRoot, [fooFile]);

    var barRoot = findRoot(roots, getFolder(barPath));
    expect(barRoot.includedPaths, unorderedEquals([barFile.path]));
    expect(barRoot.excludedPaths, isEmpty);
    expect(barRoot.optionsFile, isNull);
    expect(barRoot.packagesFile, isNull);
    _assertPubWorkspace(barRoot.workspace, barPath);
    _assertAnalyzedFiles2(barRoot, [barFile]);
  }

  void test_locateRoots_multiple_files_sameOptions_differentPackages() {
    var fooPackagesFile = newPackageConfigJsonFile('/home/foo');
    var barPackagesFile = newPackageConfigJsonFile('/home/bar');
    var optionsFile = newAnalysisOptionsYamlFile('/home');
    var fooFile = newFile('/home/foo/lib/foo.dart');
    var barFile = newFile('/home/bar/lib/bar.dart');

    List<ContextRoot> roots = contextLocator.locateRoots(
      includedPaths: [fooFile.path, barFile.path],
    );
    expect(roots, hasLength(2));

    ContextRoot fooRoot = findRoot(roots, getFolder('/home/foo'));
    expect(fooRoot.includedPaths, unorderedEquals([fooFile.path]));
    expect(fooRoot.excludedPaths, isEmpty);
    expect(fooRoot.optionsFile, optionsFile);
    expect(fooRoot.packagesFile, fooPackagesFile);
    _assertAnalyzedFiles2(fooRoot, [fooFile]);

    ContextRoot barRoot = findRoot(roots, getFolder('/home/bar'));
    expect(barRoot.includedPaths, unorderedEquals([barFile.path]));
    expect(barRoot.excludedPaths, isEmpty);
    expect(barRoot.optionsFile, optionsFile);
    expect(barRoot.packagesFile, barPackagesFile);
    _assertAnalyzedFiles2(barRoot, [barFile]);
  }

  void test_locateRoots_multiple_files_samePackages_differentOptions() {
    var packagesFile = newPackageConfigJsonFile('/home');
    var fooOptionsFile = newAnalysisOptionsYamlFile('/home/foo');
    var barOptionsFile = newAnalysisOptionsYamlFile('/home/bar');
    var fooFile = newFile('/home/foo/lib/foo.dart');
    var barFile = newFile('/home/bar/lib/bar.dart');

    List<ContextRoot> roots = contextLocator.locateRoots(
      includedPaths: [fooFile.path, barFile.path],
    );
    expect(roots, hasLength(2));

    ContextRoot fooRoot = findRoot(roots, getFolder('/home/foo'));
    expect(fooRoot.includedPaths, unorderedEquals([fooFile.path]));
    expect(fooRoot.excludedPaths, isEmpty);
    expect(fooRoot.optionsFile, fooOptionsFile);
    expect(fooRoot.packagesFile, packagesFile);
    _assertAnalyzedFiles2(fooRoot, [fooFile]);

    ContextRoot barRoot = findRoot(roots, getFolder('/home/bar'));
    expect(barRoot.includedPaths, unorderedEquals([barFile.path]));
    expect(barRoot.excludedPaths, isEmpty);
    expect(barRoot.optionsFile, barOptionsFile);
    expect(barRoot.packagesFile, packagesFile);
    _assertAnalyzedFiles2(barRoot, [barFile]);
  }

  void test_locateRoots_nested_excluded_dot() {
    Folder outerRootFolder = newFolder('/test/outer');
    File outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    File outerPackagesFile = newDotPackagesFile('/test/outer');

    newFolder('/test/outer/.examples');
    newAnalysisOptionsYamlFile('/test/outer/.examples/inner');

    // Only one analysis root, we skipped `.examples` for context roots.
    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [outerRootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, isEmpty);
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);
  }

  void test_locateRoots_nested_excluded_explicit() {
    Folder outerRootFolder = newFolder('/test/outer');
    File outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    File outerPackagesFile = newDotPackagesFile('/test/outer');
    Folder excludedFolder = newFolder('/test/outer/examples');
    newAnalysisOptionsYamlFile('/test/outer/examples/inner');

    List<ContextRoot> roots = contextLocator.locateRoots(
        includedPaths: [outerRootFolder.path],
        excludedPaths: [excludedFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, unorderedEquals([excludedFolder.path]));
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);
  }

  void test_locateRoots_nested_multiple() {
    Folder outerRootFolder = newFolder('/test/outer');
    File outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    File outerPackagesFile = newDotPackagesFile('/test/outer');
    Folder inner1RootFolder = newFolder('/test/outer/examples/inner1');
    File inner1OptionsFile =
        newAnalysisOptionsYamlFile('/test/outer/examples/inner1');
    Folder inner2RootFolder = newFolder('/test/outer/examples/inner2');
    File inner2PackagesFile = newDotPackagesFile('/test/outer/examples/inner2');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [outerRootFolder.path]);
    expect(roots, hasLength(3));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths,
        unorderedEquals([inner1RootFolder.path, inner2RootFolder.path]));
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);

    ContextRoot inner1Root = findRoot(roots, inner1RootFolder);
    expect(inner1Root.includedPaths, unorderedEquals([inner1RootFolder.path]));
    expect(inner1Root.excludedPaths, isEmpty);
    expect(inner1Root.optionsFile, inner1OptionsFile);
    expect(inner1Root.packagesFile, outerPackagesFile);

    ContextRoot inner2Root = findRoot(roots, inner2RootFolder);
    expect(inner2Root.includedPaths, unorderedEquals([inner2RootFolder.path]));
    expect(inner2Root.excludedPaths, isEmpty);
    expect(inner2Root.optionsFile, outerOptionsFile);
    expect(inner2Root.packagesFile, inner2PackagesFile);
  }

  void test_locateRoots_nested_options() {
    Folder outerRootFolder = newFolder('/test/outer');
    File outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    File outerPackagesFile = newDotPackagesFile('/test/outer');
    Folder innerRootFolder = newFolder('/test/outer/examples/inner');
    File innerOptionsFile =
        newAnalysisOptionsYamlFile('/test/outer/examples/inner');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [outerRootFolder.path]);
    expect(roots, hasLength(2));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, unorderedEquals([innerRootFolder.path]));
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);

    ContextRoot innerRoot = findRoot(roots, innerRootFolder);
    expect(innerRoot.includedPaths, unorderedEquals([innerRootFolder.path]));
    expect(innerRoot.excludedPaths, isEmpty);
    expect(innerRoot.optionsFile, innerOptionsFile);
    expect(innerRoot.packagesFile, outerPackagesFile);
  }

  void test_locateRoots_nested_options_overriddenOptions() {
    Folder outerRootFolder = newFolder('/test/outer');
    newAnalysisOptionsYamlFile('/test/outer');
    File outerPackagesFile = newDotPackagesFile('/test/outer');
    newFolder('/test/outer/examples/inner');
    newAnalysisOptionsYamlFile('/test/outer/examples/inner');
    File overrideOptionsFile = newAnalysisOptionsYamlFile('/test/override');

    List<ContextRoot> roots = contextLocator.locateRoots(
        includedPaths: [outerRootFolder.path],
        optionsFile: overrideOptionsFile.path);
    expect(roots, hasLength(1));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, isEmpty);
    expect(outerRoot.optionsFile, overrideOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);
  }

  void test_locateRoots_nested_options_overriddenPackages() {
    Folder outerRootFolder = newFolder('/test/outer');
    File outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    newDotPackagesFile('/test/outer');
    Folder innerRootFolder = newFolder('/test/outer/examples/inner');
    File innerOptionsFile =
        newAnalysisOptionsYamlFile('/test/outer/examples/inner');
    File overridePackagesFile = newDotPackagesFile('/test/override');

    List<ContextRoot> roots = contextLocator.locateRoots(
        includedPaths: [outerRootFolder.path],
        packagesFile: overridePackagesFile.path);
    expect(roots, hasLength(2));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, unorderedEquals([innerRootFolder.path]));
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, overridePackagesFile);

    ContextRoot innerRoot = findRoot(roots, innerRootFolder);
    expect(innerRoot.includedPaths, unorderedEquals([innerRootFolder.path]));
    expect(innerRoot.excludedPaths, isEmpty);
    expect(innerRoot.optionsFile, innerOptionsFile);
    expect(innerRoot.packagesFile, overridePackagesFile);
  }

  void test_locateRoots_nested_optionsAndPackages() {
    Folder outerRootFolder = newFolder('/test/outer');
    File outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    File outerPackagesFile = newDotPackagesFile('/test/outer');
    Folder innerRootFolder = newFolder('/test/outer/examples/inner');
    File innerOptionsFile =
        newAnalysisOptionsYamlFile('/test/outer/examples/inner');
    File innerPackagesFile = newDotPackagesFile('/test/outer/examples/inner');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [outerRootFolder.path]);
    expect(roots, hasLength(2));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, unorderedEquals([innerRootFolder.path]));
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);

    ContextRoot innerRoot = findRoot(roots, innerRootFolder);
    expect(innerRoot.includedPaths, unorderedEquals([innerRootFolder.path]));
    expect(innerRoot.excludedPaths, isEmpty);
    expect(innerRoot.optionsFile, innerOptionsFile);
    expect(innerRoot.packagesFile, innerPackagesFile);
  }

  void test_locateRoots_nested_optionsAndPackages_overriddenBoth() {
    Folder outerRootFolder = newFolder('/test/outer');
    newAnalysisOptionsYamlFile('/test/outer');
    newDotPackagesFile('/test/outer');
    newFolder('/test/outer/examples/inner');
    newAnalysisOptionsYamlFile('/test/outer/examples/inner');
    newDotPackagesFile('/test/outer/examples/inner');
    File overrideOptionsFile = newAnalysisOptionsYamlFile('/test/override');
    File overridePackagesFile = newDotPackagesFile('/test/override');

    List<ContextRoot> roots = contextLocator.locateRoots(
        includedPaths: [outerRootFolder.path],
        optionsFile: overrideOptionsFile.path,
        packagesFile: overridePackagesFile.path);
    expect(roots, hasLength(1));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, isEmpty);
    expect(outerRoot.optionsFile, overrideOptionsFile);
    expect(outerRoot.packagesFile, overridePackagesFile);
  }

  void test_locateRoots_nested_packageConfigJson() {
    var outerRootFolder = newFolder('/test/outer');
    var outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    var outerPackagesFile = newPackageConfigJsonFile('/test/outer');
    var innerRootFolder = newFolder('/test/outer/examples/inner');
    var innerPackagesFile =
        newPackageConfigJsonFile('/test/outer/examples/inner');

    var roots = contextLocator.locateRoots(
      includedPaths: [outerRootFolder.path],
    );
    expect(roots, hasLength(2));

    var outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, unorderedEquals([innerRootFolder.path]));
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);

    var innerRoot = findRoot(roots, innerRootFolder);
    expect(innerRoot.includedPaths, unorderedEquals([innerRootFolder.path]));
    expect(innerRoot.excludedPaths, isEmpty);
    expect(innerRoot.optionsFile, outerOptionsFile);
    expect(innerRoot.packagesFile, innerPackagesFile);
  }

  void test_locateRoots_nested_packages() {
    Folder outerRootFolder = newFolder('/test/outer');
    File outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    File outerPackagesFile = newDotPackagesFile('/test/outer');
    Folder innerRootFolder = newFolder('/test/outer/examples/inner');
    File innerPackagesFile = newDotPackagesFile('/test/outer/examples/inner');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [outerRootFolder.path]);
    expect(roots, hasLength(2));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, unorderedEquals([innerRootFolder.path]));
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);

    ContextRoot innerRoot = findRoot(roots, innerRootFolder);
    expect(innerRoot.includedPaths, unorderedEquals([innerRootFolder.path]));
    expect(innerRoot.excludedPaths, isEmpty);
    expect(innerRoot.optionsFile, outerOptionsFile);
    expect(innerRoot.packagesFile, innerPackagesFile);
  }

  void test_locateRoots_nested_packages_overriddenOptions() {
    Folder outerRootFolder = newFolder('/test/outer');
    newAnalysisOptionsYamlFile('/test/outer');
    File outerPackagesFile = newDotPackagesFile('/test/outer');
    Folder innerRootFolder = newFolder('/test/outer/examples/inner');
    File innerPackagesFile = newDotPackagesFile('/test/outer/examples/inner');
    File overrideOptionsFile = newAnalysisOptionsYamlFile('/test/override');

    List<ContextRoot> roots = contextLocator.locateRoots(
        includedPaths: [outerRootFolder.path],
        optionsFile: overrideOptionsFile.path);
    expect(roots, hasLength(2));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, unorderedEquals([innerRootFolder.path]));
    expect(outerRoot.optionsFile, overrideOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);

    ContextRoot innerRoot = findRoot(roots, innerRootFolder);
    expect(innerRoot.includedPaths, unorderedEquals([innerRootFolder.path]));
    expect(innerRoot.excludedPaths, isEmpty);
    expect(innerRoot.optionsFile, overrideOptionsFile);
    expect(innerRoot.packagesFile, innerPackagesFile);
  }

  void test_locateRoots_nested_packages_overriddenPackages() {
    Folder outerRootFolder = newFolder('/test/outer');
    File outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    newDotPackagesFile('/test/outer');
    newFolder('/test/outer/examples/inner');
    newDotPackagesFile('/test/outer/examples/inner');
    File overridePackagesFile = newDotPackagesFile('/test/override');

    List<ContextRoot> roots = contextLocator.locateRoots(
        includedPaths: [outerRootFolder.path],
        packagesFile: overridePackagesFile.path);
    expect(roots, hasLength(1));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths, isEmpty);
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, overridePackagesFile);
  }

  void test_locateRoots_nested_packagesDirectory_included() {
    Folder outerRootFolder = newFolder('/test/outer');
    File outerOptionsFile = newAnalysisOptionsYamlFile('/test/outer');
    File outerPackagesFile = newDotPackagesFile('/test/outer');
    File innerOptionsFile =
        newAnalysisOptionsYamlFile('/test/outer/packages/inner');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [outerRootFolder.path]);
    expect(roots, hasLength(2));

    ContextRoot outerRoot = findRoot(roots, outerRootFolder);
    expect(outerRoot.includedPaths, unorderedEquals([outerRootFolder.path]));
    expect(outerRoot.excludedPaths,
        unorderedEquals([innerOptionsFile.parent2.path]));
    expect(outerRoot.optionsFile, outerOptionsFile);
    expect(outerRoot.packagesFile, outerPackagesFile);
  }

  void test_locateRoots_options_default_bazel() {
    var workspacePath = '/home/workspace';
    var workspaceFolder = getFolder(workspacePath);
    newFile('$workspacePath/WORKSPACE');
    var bazelOptionsFile = newFile(
      '$workspacePath/dart/analysis_options/lib/default.yaml',
    );

    var rootFolder = getFolder('$workspacePath/test');

    var roots = contextLocator.locateRoots(
      includedPaths: [rootFolder.path],
    );
    expect(roots, hasLength(1));

    var root = findRoot(roots, workspaceFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, bazelOptionsFile);
    expect(root.packagesFile, isNull);
  }

  void test_locateRoots_options_default_flutter() {
    var rootFolder = newFolder('/home/test');

    var flutterPath = '/home/packages/flutter';
    var flutterAnalysisOptionsFile = newFile(
      '$flutterPath/lib/analysis_options_user.yaml',
    );

    var packageConfigFileBuilder = PackageConfigFileBuilder()
      ..add(name: 'flutter', rootPath: flutterPath);
    var packagesFile = newPackageConfigJsonFile(
      rootFolder.path,
      content: packageConfigFileBuilder.toContent(toUriStr: toUriStr),
    );

    var roots = contextLocator.locateRoots(
      includedPaths: [rootFolder.path],
    );
    expect(roots, hasLength(1));

    var root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, flutterAnalysisOptionsFile);
    expect(root.packagesFile, packagesFile);
  }

  void test_locateRoots_options_hasError() {
    Folder rootFolder = newFolder('/test/root');
    File optionsFile = newAnalysisOptionsYamlFile('/test/root', content: '''
analyzer:
  exclude:
    - **.g.dart
analyzer:
''');
    File packagesFile = newDotPackagesFile('/test/root');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, optionsFile);
    expect(root.packagesFile, packagesFile);

    // There is an error in the analysis_options.yaml, so it is ignored.
    _assertAnalyzed(root, [
      '/test/root//lib/a.dart',
      '/test/root//lib/a.g.dart',
    ]);
  }

  void test_locateRoots_options_withExclude_someFiles() {
    Folder rootFolder = newFolder('/test/root');
    File optionsFile = newAnalysisOptionsYamlFile('/test/root', content: '''
analyzer:
  exclude:
    - data/**.g.dart
''');
    File packagesFile = newDotPackagesFile('/test/root');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, optionsFile);
    expect(root.packagesFile, packagesFile);

    _assertNotAnalyzed(root, [
      '/test/root/data/f.g.dart',
      '/test/root/data/foo/f.g.dart',
      '/test/root/data/foo/bar/f.g.dart',
    ]);

    _assertAnalyzed(root, [
      '/test/root/f.g.dart',
      '/test/root/data/f.dart',
      '/test/root/data/foo/f.dart',
      '/test/root/data/foo/bar/f.dart',
    ]);
  }

  void test_locateRoots_options_withExclude_someFolders() {
    Folder rootFolder = newFolder('/test/root');
    File optionsFile = newAnalysisOptionsYamlFile('/test/root', content: '''
analyzer:
  exclude:
    - data/**/foo/**
''');
    File packagesFile = newDotPackagesFile('/test/root');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, optionsFile);
    expect(root.packagesFile, packagesFile);

    _assertNotAnalyzed(root, [
      '/test/root/data/aaa/foo/f.dart',
      '/test/root/data/aaa/foo/bar/f.dart',
    ]);

    _assertAnalyzed(root, [
      '/test/root/f.dart',
      '/test/root/data/f.dart',
      '/test/root/data/foo/f.dart',
      '/test/root/data/aaa/bar/f.dart',
    ]);
  }

  void test_locateRoots_options_withExclude_wholeFolder() {
    Folder rootFolder = newFolder('/test/root');
    File optionsFile = newAnalysisOptionsYamlFile('/test/root', content: '''
analyzer:
  exclude:
    - data/**
''');
    File packagesFile = newDotPackagesFile('/test/root');
    newFolder('/test/root/data');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, optionsFile);
    expect(root.packagesFile, packagesFile);

    _assertNotAnalyzed(root, [
      '/test/root/data/f.dart',
      '/test/root/data/foo/f.dart',
    ]);

    _assertAnalyzed(root, [
      '/test/root/f.dart',
    ]);
  }

  void test_locateRoots_options_withExclude_wholeFolder_includedOptions() {
    Folder rootFolder = newFolder('/test/root');
    File optionsFile = newAnalysisOptionsYamlFile('/test/root', content: '''
include: has_excludes.yaml
''');
    newFile('/test/root/has_excludes.yaml', content: '''
analyzer:
  exclude:
    - data/**
''');

    File packagesFile = newDotPackagesFile('/test/root');
    newFolder('/test/root/data');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, optionsFile);
    expect(root.packagesFile, packagesFile);

    _assertNotAnalyzed(root, [
      '/test/root/data/f.dart',
      '/test/root/data/foo/f.dart',
    ]);

    _assertAnalyzed(root, [
      '/test/root/f.dart',
    ]);
  }

  void test_locateRoots_options_withExclude_wholeFolder_includedOptionsMerge() {
    Folder rootFolder = newFolder('/test/root');
    File optionsFile = newAnalysisOptionsYamlFile('/test/root', content: '''
include: has_excludes.yaml
analyzer:
  exclude:
    - bar/**
''');
    newFile('/test/root/has_excludes.yaml', content: '''
analyzer:
  exclude:
    - foo/**
''');

    File packagesFile = newDotPackagesFile('/test/root');
    newFolder('/test/root/foo');
    newFolder('/test/root/bar');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, optionsFile);
    expect(root.packagesFile, packagesFile);

    _assertNotAnalyzed(root, [
      '/test/root/foo/f.dart',
      '/test/root/foo/aaa/f.dart',
      '/test/root/bar/f.dart',
      '/test/root/bar/aaa/f.dart',
    ]);

    _assertAnalyzed(root, [
      '/test/root/f.dart',
      '/test/root/baz/f.dart',
    ]);
  }

  void test_locateRoots_options_withExclude_wholeFolder_withItsOptions() {
    Folder rootFolder = newFolder('/test/root');
    File optionsFile = newAnalysisOptionsYamlFile('/test/root', content: '''
analyzer:
  exclude:
    - data/**
''');
    File packagesFile = newDotPackagesFile('/test/root');
    newFolder('/test/root/data');
    newAnalysisOptionsYamlFile('/test/root/data', content: '');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot root = findRoot(roots, rootFolder);
    expect(root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(root.excludedPaths, isEmpty);
    expect(root.optionsFile, optionsFile);
    expect(root.packagesFile, packagesFile);

    _assertNotAnalyzed(root, [
      '/test/root/data/f.dart',
      '/test/root/data/foo/f.dart',
    ]);

    _assertAnalyzed(root, [
      '/test/root/f.dart',
    ]);
  }

  void test_locateRoots_single_dir_directOptions_directPackages() {
    Folder rootFolder = newFolder('/test/root');
    File optionsFile = newAnalysisOptionsYamlFile('/test/root');
    File packagesFile = newDotPackagesFile('/test/root');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot package1Root = findRoot(roots, rootFolder);
    expect(package1Root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(package1Root.excludedPaths, isEmpty);
    expect(package1Root.optionsFile, optionsFile);
    expect(package1Root.packagesFile, packagesFile);
  }

  void test_locateRoots_single_dir_directOptions_inheritedPackages() {
    Folder rootFolder = newFolder('/test/root');
    File optionsFile = newAnalysisOptionsYamlFile('/test/root');
    File packagesFile = newDotPackagesFile('/test');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot package1Root = findRoot(roots, rootFolder);
    expect(package1Root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(package1Root.excludedPaths, isEmpty);
    expect(package1Root.optionsFile, optionsFile);
    expect(package1Root.packagesFile, packagesFile);
  }

  void test_locateRoots_single_dir_inheritedOptions_directPackages() {
    Folder rootFolder = newFolder('/test/root');
    File optionsFile = newAnalysisOptionsYamlFile('/test');
    File packagesFile = newDotPackagesFile('/test/root');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot package1Root = findRoot(roots, rootFolder);
    expect(package1Root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(package1Root.excludedPaths, isEmpty);
    expect(package1Root.optionsFile, optionsFile);
    expect(package1Root.packagesFile, packagesFile);
  }

  void test_locateRoots_single_dir_inheritedOptions_inheritedPackages() {
    Folder rootFolder = newFolder('/test/root');
    File optionsFile = newAnalysisOptionsYamlFile('/test');
    File packagesFile = newDotPackagesFile('/test');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    ContextRoot package1Root = findRoot(roots, rootFolder);
    expect(package1Root.includedPaths, unorderedEquals([rootFolder.path]));
    expect(package1Root.excludedPaths, isEmpty);
    expect(package1Root.optionsFile, optionsFile);
    expect(package1Root.packagesFile, packagesFile);
  }

  void test_locateRoots_single_dir_prefer_packageConfigJson() {
    var rootFolder = newFolder('/test');
    var optionsFile = newAnalysisOptionsYamlFile('/test');
    newDotPackagesFile('/test'); // the file is not used
    var packageConfigJsonFile = newPackageConfigJsonFile('/test');

    var roots = contextLocator.locateRoots(includedPaths: [rootFolder.path]);
    expect(roots, hasLength(1));

    var contentRoot = findRoot(roots, rootFolder);
    expect(contentRoot.includedPaths, unorderedEquals([rootFolder.path]));
    expect(contentRoot.excludedPaths, isEmpty);
    expect(contentRoot.optionsFile, optionsFile);
    expect(contentRoot.packagesFile, packageConfigJsonFile);
  }

  void test_locateRoots_single_file_inheritedOptions_directPackages() {
    File optionsFile = newAnalysisOptionsYamlFile('/test');
    File packagesFile = newDotPackagesFile('/test/root');
    File testFile = newFile('/test/root/test.dart');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [testFile.path]);
    expect(roots, hasLength(1));

    ContextRoot package1Root = findRoot(roots, testFile.parent2);
    expect(package1Root.includedPaths, unorderedEquals([testFile.path]));
    expect(package1Root.excludedPaths, isEmpty);
    expect(package1Root.optionsFile, optionsFile);
    expect(package1Root.packagesFile, packagesFile);
  }

  void test_locateRoots_single_file_notExisting() {
    File optionsFile = newAnalysisOptionsYamlFile('/test');
    File packagesFile = newDotPackagesFile('/test/root');
    File testFile = getFile('/test/root/test.dart');

    List<ContextRoot> roots =
        contextLocator.locateRoots(includedPaths: [testFile.path]);
    expect(roots, hasLength(1));

    ContextRoot package1Root = findRoot(roots, testFile.parent2);
    expect(package1Root.includedPaths, unorderedEquals([testFile.path]));
    expect(package1Root.excludedPaths, isEmpty);
    expect(package1Root.optionsFile, optionsFile);
    expect(package1Root.packagesFile, packagesFile);
  }

  void _assertAnalyzed(ContextRoot root, List<String> posixPathList) {
    for (var posixPath in posixPathList) {
      var path = convertPath(posixPath);
      expect(root.isAnalyzed(path), isTrue, reason: path);
    }
  }

  void _assertAnalyzedFiles(ContextRoot root, List<String> posixPathList) {
    var pathList = posixPathList.map(convertPath).toList();

    var analyzedFiles = root.analyzedFiles().toList();
    expect(analyzedFiles, unorderedEquals(pathList));

    for (var path in pathList) {
      expect(root.isAnalyzed(path), isTrue, reason: path);
    }
  }

  void _assertAnalyzedFiles2(ContextRoot root, List<File> files) {
    var pathList = files.map((file) => file.path).toList();
    _assertAnalyzedFiles(root, pathList);
  }

  void _assertBasicWorkspace(Workspace _workspace, String posixRoot) {
    var workspace = _workspace as BasicWorkspace;
    var root = convertPath(posixRoot);
    expect(workspace.root, root);
  }

  void _assertBazelWorkspace(Workspace _workspace, String posixRoot) {
    var workspace = _workspace as BazelWorkspace;
    var root = convertPath(posixRoot);
    expect(workspace.root, root);
  }

  void _assertNotAnalyzed(ContextRoot root, List<String> posixPathList) {
    for (var posixPath in posixPathList) {
      var path = convertPath(posixPath);
      expect(root.isAnalyzed(path), isFalse, reason: path);
    }
  }

  void _assertPubWorkspace(Workspace _workspace, String posixRoot) {
    var workspace = _workspace as PubWorkspace;
    var root = convertPath(posixRoot);
    expect(workspace.root, root);
  }
}