def watched = resolveWatchedFiles(watchable, buildHierarchy([]))
        then:
        rootsOf(watched) == []
        1 * watchable.stream() >> Stream.of()
    }

    def "watches empty directory"() {
        def watchable = Mock(WatchableHierarchies)
        def dir = new File("empty").absoluteFile

        when:
        def watched = resolveWatchedFiles(watchable, buildHierarchy([
            directory(dir.absolutePath, [])

        boolean realizeTasks = GradleProjectBuilderOptions.shouldRealizeTasks();
        return buildHierarchy(project.getRootProject(), realizeTasks);
    }

    /**
     * When {@code realizeTasks} is false, the project's task graph will not be realized, and the task list in the model will be empty
     */
    private static DefaultGradleProject buildHierarchy(Project project, boolean realizeTasks) {

        new MissingFileSnapshot(
            absolutePath,
            accessType
        )
    }

    static SnapshotHierarchy buildHierarchy(CaseSensitivity caseSensitivity = CaseSensitivity.CASE_INSENSITIVE, List<FileSystemLocationSnapshot> snapshots) {
        SnapshotHierarchy root = DefaultSnapshotHierarchy.empty(caseSensitivity)

                }
            }
        }
    }

    private DefaultEclipseProject buildHierarchy(Project project) {
        List<DefaultEclipseProject> children = new ArrayList<>();
        for (Project child : getChildProjectsForInternalUse(project)) {
            children.add(buildHierarchy(child));
        }

        EclipseModel eclipseModel = project.getExtensions().getByType(EclipseModel.class);