#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2013 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
# See doc/COPYRIGHT.rdoc for more details.
#++
require File.expand_path('../../test_helper', __FILE__)

class QueryTest < ActiveSupport::TestCase
  fixtures :all

  def test_custom_fields_for_all_projects_should_be_available_in_global_queries
    query = Query.new(:project => nil, :name => '_')
    assert query.work_package_filter_available?('cf_1')
    assert !query.work_package_filter_available?('cf_3')
  end

  def test_system_shared_versions_should_be_available_in_global_queries
    Version.find(2).update_attribute :sharing, 'system'
    query = Query.new(:project => nil, :name => '_')
    assert query.work_package_filter_available?('fixed_version_id')
    assert query.available_work_package_filters['fixed_version_id'][:values].detect {|v| v.last == '2'}
  end

  def test_project_filter_in_global_queries
    # User.current should be anonymous here
    query = Query.new(:project => nil, :name => '_')
    project_filter = query.available_work_package_filters["project_id"]
    assert_not_nil project_filter
    project_ids = project_filter[:values].map{|p| p[1]}
    assert project_ids.include?("1")  #public project
    assert !project_ids.include?("2") #private project anonymous user cannot see
  end

  def find_issues_with_query(query)
    WorkPackage.find :all,
      :include => [ :assigned_to, :status, :type, :project, :priority ],
      :conditions => query.statement
  end

  def assert_find_issues_with_query_is_successful(query)
    assert_nothing_raised do
      find_issues_with_query(query)
    end
  end

  def assert_query_statement_includes(query, condition)
    assert query.statement.include?(condition), "Query statement condition not found in: #{query.statement}"
  end

  def test_query_should_allow_shared_versions_for_a_project_query
    subproject_version = Version.find(4)
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('fixed_version_id', '=', [subproject_version.id.to_s])

    assert query.statement.include?("#{WorkPackage.table_name}.fixed_version_id IN ('4')")
  end

  def test_query_with_multiple_custom_fields
    query = Query.find(1)
    assert query.valid?
    assert query.statement.include?("#{CustomValue.table_name}.value IN ('MySQL')")
    issues = find_issues_with_query(query)
    assert_equal 1, issues.length
    assert_equal WorkPackage.find(3), issues.first
  end

  def test_operator_none
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('fixed_version_id', '!*', [''])
    query.add_filter('cf_1', '!*', [''])
    assert query.statement.include?("#{WorkPackage.table_name}.fixed_version_id IS NULL")
    assert query.statement.include?("#{CustomValue.table_name}.value IS NULL OR #{CustomValue.table_name}.value = ''")
    find_issues_with_query(query)
  end

  def test_operator_none_for_integer
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('estimated_hours', '!*', [''])
    issues = find_issues_with_query(query)
    assert !issues.empty?
    assert issues.all? {|i| !i.estimated_hours}
  end

  def test_operator_all
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('fixed_version_id', '*', [''])
    query.add_filter('cf_1', '*', [''])
    assert query.statement.include?("#{WorkPackage.table_name}.fixed_version_id IS NOT NULL")
    assert query.statement.include?("#{CustomValue.table_name}.value IS NOT NULL AND #{CustomValue.table_name}.value <> ''")
    find_issues_with_query(query)
  end

  def test_operator_greater_than
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('done_ratio', '>=', ['40'])
    assert query.statement.include?("#{WorkPackage.table_name}.done_ratio >= 40")
    find_issues_with_query(query)
  end

  def test_operator_in_more_than
    WorkPackage.find(7).update_attribute(:due_date, (Date.today + 15))
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('due_date', '>t+', ['15'])
    issues = find_issues_with_query(query)
    assert !issues.empty?
    issues.each {|issue| assert(issue.due_date >= (Date.today + 15))}
  end

  def test_operator_in_less_than
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('due_date', '<t+', ['15'])
    issues = find_issues_with_query(query)
    assert !issues.empty?
    issues.each {|issue| assert(issue.due_date >= Date.today && issue.due_date <= (Date.today + 15))}
  end

  def test_operator_less_than_ago
    WorkPackage.find(7).update_attribute(:due_date, (Date.today - 3))
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('due_date', '>t-', ['3'])
    issues = find_issues_with_query(query)
    assert !issues.empty?
    issues.each {|issue| assert(issue.due_date >= (Date.today - 3) && issue.due_date <= Date.today)}
  end

  def test_operator_more_than_ago
    WorkPackage.find(7).update_attribute(:due_date, (Date.today - 10))
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('due_date', '<t-', ['10'])
    assert query.statement.include?("#{WorkPackage.table_name}.due_date <=")
    issues = find_issues_with_query(query)
    assert !issues.empty?
    issues.each {|issue| assert(issue.due_date <= (Date.today - 10))}
  end

  def test_operator_in
    WorkPackage.find(7).update_attribute(:due_date, (Date.today + 2))
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('due_date', 't+', ['2'])
    issues = find_issues_with_query(query)
    assert !issues.empty?
    issues.each {|issue| assert_equal((Date.today + 2), issue.due_date)}
  end

  def test_operator_ago
    WorkPackage.find(7).update_attribute(:due_date, (Date.today - 3))
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('due_date', 't-', ['3'])
    issues = find_issues_with_query(query)
    assert !issues.empty?
    issues.each {|issue| assert_equal((Date.today - 3), issue.due_date)}
  end

  def test_operator_today
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('due_date', 't', [''])
    issues = find_issues_with_query(query)
    assert !issues.empty?
    issues.each {|issue| assert_equal Date.today, issue.due_date}
  end

  def test_operator_this_week_on_date
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('due_date', 'w', [''])
    find_issues_with_query(query)
  end

  def test_operator_this_week_on_datetime
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('created_on', 'w', [''])
    find_issues_with_query(query)
  end

  def test_operator_contains
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('subject', '~', ['uNable'])
    assert query.statement.include?("LOWER(#{WorkPackage.table_name}.subject) LIKE '%unable%'")
    result = find_issues_with_query(query)
    assert result.empty?
    result.each {|issue| assert issue.subject.downcase.include?('unable') }
  end

  def test_operator_does_not_contains
    query = Query.new(:project => Project.find(1), :name => '_')
    query.add_filter('subject', '!~', ['uNable'])
    assert query.statement.include?("LOWER(#{WorkPackage.table_name}.subject) NOT LIKE '%unable%'")
    find_issues_with_query(query)
  end

  def test_filter_assigned_to_me
    user = User.find(2)
    group = Group.find(10)
    project = Project.find(1)
    User.current = user
    i1 = FactoryGirl.create(:work_package, :project => project, :type => project.types.first, :assigned_to => user)
    i2 = FactoryGirl.create(:work_package, :project => project, :type => project.types.first, :assigned_to => group)
    i3 = FactoryGirl.create(:work_package, :project => project, :type => project.types.first, :assigned_to => Group.find(11))
    group.users << user

    query = Query.new(:name => '_', filters: [Queries::WorkPackages::Filter.new(:assigned_to_id, operator: '=', values: ['me'])])
    result = query.results.work_packages
    assert_equal WorkPackage.visible.all(:conditions => {:assigned_to_id => ([2] + user.reload.group_ids)}).sort_by(&:id), result.sort_by(&:id)

    assert result.include?(i1)
    assert result.include?(i2)
    assert !result.include?(i3)

    User.current = nil
  end

  def test_filter_watched_issues
    User.current = User.find(1)
    query = Query.new(name: '_', filters: [Queries::WorkPackages::Filter.new(:watcher_id, operator: '=', values: ['me'])])
    result = find_issues_with_query(query)
    assert_not_nil result
    assert !result.empty?
    assert_equal WorkPackage.visible.watched_by(User.current).sort_by(&:id), result.sort_by(&:id)
    User.current = nil
  end

  def test_filter_unwatched_issues
    User.current = User.find(1)
    query = Query.new(name: '_', filters: [Queries::WorkPackages::Filter.new(:watcher_id, operator: '!', values: ['me'])])
    result = find_issues_with_query(query)
    assert_not_nil result
    assert !result.empty?
    assert_equal((WorkPackage.visible - WorkPackage.watched_by(User.current)).sort_by(&:id).size, result.sort_by(&:id).size)
    User.current = nil
  end

  def test_default_columns
    q = Query.new
    assert !q.columns.empty?
  end

  def test_set_column_names
    q = Query.new
    q.column_names = ['type', :subject, '', 'unknonw_column']
    assert_equal [:type, :subject], q.columns.collect {|c| c.name}
    c = q.columns.first
    assert q.has_column?(c)
  end

  def test_groupable_columns_should_include_custom_fields
    q = Query.new
    assert q.groupable_columns.detect {|c| c.is_a? QueryCustomFieldColumn}
  end

  def test_grouped_with_valid_column
    q = Query.new(:group_by => 'status')
    assert q.grouped?
    assert_not_nil q.group_by_column
    assert_equal :status, q.group_by_column.name
    assert_not_nil q.group_by_statement
    assert_equal 'status', q.group_by_statement
  end

  def test_grouped_with_invalid_column
    q = Query.new(:group_by => 'foo')
    assert !q.grouped?
    assert_nil q.group_by_column
    assert_nil q.group_by_statement
  end

  def test_default_sort
    q = Query.new
    assert_equal [], q.sort_criteria
  end

  def test_set_sort_criteria_with_hash
    q = Query.new
    q.sort_criteria = {'0' => ['priority', 'desc'], '2' => ['type']}
    assert_equal [['priority', 'desc'], ['type', 'asc']], q.sort_criteria
  end

  def test_set_sort_criteria_with_array
    q = Query.new
    q.sort_criteria = [['priority', 'desc'], 'type']
    assert_equal [['priority', 'desc'], ['type', 'asc']], q.sort_criteria
  end

  def test_create_query_with_sort
    q = Query.new({name: 'Sorted'}, initialize_with_default_filter: true)
    q.sort_criteria = [['priority', 'desc'], 'type']
    assert q.save
    q.reload
    assert_equal [['priority', 'desc'], ['type', 'asc']], q.sort_criteria
  end

  def test_sort_by_string_custom_field_asc
    q = Query.new
    c = q.available_columns.find {|col| col.is_a?(QueryCustomFieldColumn) && col.custom_field.field_format == 'string' }
    assert c
    assert c.sortable
    issues = WorkPackage.find :all,
                        :include => [ :assigned_to, :status, :type, :project, :priority ],
                        :conditions => q.statement,
                        :order => "#{c.sortable} ASC"
    values = issues.collect {|i| i.custom_value_for(c.custom_field).to_s}
    assert !values.empty?
    assert_equal values.sort, values
  end

  def test_sort_by_string_custom_field_desc
    q = Query.new
    c = q.available_columns.find {|col| col.is_a?(QueryCustomFieldColumn) && col.custom_field.field_format == 'string' }
    assert c
    assert c.sortable
    issues = WorkPackage.find :all,
                        :include => [ :assigned_to, :status, :type, :project, :priority ],
                        :conditions => q.statement,
                        :order => "#{c.sortable} DESC"
    values = issues.collect {|i| i.custom_value_for(c.custom_field).to_s}
    assert !values.empty?
    assert_equal values.sort.reverse, values
  end

  def test_sort_by_float_custom_field_asc
    q = Query.new
    c = q.available_columns.find {|col| col.is_a?(QueryCustomFieldColumn) && col.custom_field.field_format == 'float' }
    assert c
    assert c.sortable
    issues = WorkPackage.find :all,
                        :include => [ :assigned_to, :status, :type, :project, :priority ],
                        :conditions => q.statement,
                        :order => "#{c.sortable} ASC"
    values = issues.collect {|i| begin; Kernel.Float(i.custom_value_for(c.custom_field).to_s); rescue; nil; end}.compact
    assert !values.empty?
    assert_equal values.sort, values
  end

  def test_invalid_query_should_raise_query_statement_invalid_error
    q = Query.new
    assert_raise ActiveRecord::StatementInvalid do
      q.results(:conditions => "foo = 1").work_packages.all
    end
  end

  def test_issue_count_by_association_group
    q = Query.new(:name => '_', :group_by => 'assigned_to')
    count_by_group = q.results.work_package_count_by_group
    assert_kind_of Hash, count_by_group
    assert_equal %w(NilClass User), count_by_group.keys.collect {|k| k.class.name}.uniq.sort
    assert_equal %w(Fixnum), count_by_group.values.collect {|k| k.class.name}.uniq
    assert count_by_group.has_key?(User.find(3))
  end

  def test_issue_count_by_list_custom_field_group
    q = Query.new(:name => '_', :group_by => 'cf_1')
    count_by_group = q.results.work_package_count_by_group
    assert_kind_of Hash, count_by_group
    assert_equal %w(NilClass String), count_by_group.keys.collect {|k| k.class.name}.uniq.sort
    assert_equal %w(Fixnum), count_by_group.values.collect {|k| k.class.name}.uniq
    assert count_by_group.has_key?('MySQL')
  end

  def test_issue_count_by_date_custom_field_group
    q = Query.new(:name => '_', :group_by => 'cf_8')
    count_by_group = q.results.work_package_count_by_group
    assert_kind_of Hash, count_by_group
    assert_equal %w(Date NilClass), count_by_group.keys.collect {|k| k.class.name}.uniq.sort
    assert_equal %w(Fixnum), count_by_group.values.collect {|k| k.class.name}.uniq
  end

  def test_label_for
    q = Query.new
    assert_equal 'assigned_to', q.label_for('assigned_to_id')
  end

  def test_editable_by
    admin = User.find(1)
    manager = User.find(2)
    developer = User.find(3)

    # Public query on project 1
    q = Query.find(1)
    assert q.editable_by?(admin)
    assert q.editable_by?(manager)
    assert !q.editable_by?(developer)

    # Private query on project 1
    q = Query.find(2)
    assert q.editable_by?(admin)
    assert !q.editable_by?(manager)
    assert q.editable_by?(developer)

    # Private query for all projects
    q = Query.find(3)
    assert q.editable_by?(admin)
    assert !q.editable_by?(manager)
    assert q.editable_by?(developer)

    # Public query for all projects
    q = Query.find(4)
    assert q.editable_by?(admin)
    assert !q.editable_by?(manager)
    assert !q.editable_by?(developer)
  end

  context "#available_work_package_filters" do
    setup do
      @query = Query.new(:name => "_")
    end

    should "include users of visible projects in cross-project view" do
      users = @query.available_work_package_filters["assigned_to_id"]
      assert_not_nil users
      assert users[:values].map{|u|u[1]}.include?("3")
    end

    should "include visible projects in cross-project view" do
      projects = @query.available_work_package_filters["project_id"]
      assert_not_nil projects
      assert projects[:values].map{|u|u[1]}.include?("1")
    end

    context "'member_of_group' filter" do
      should "be present" do
        assert @query.available_work_package_filters.keys.include?("member_of_group")
      end

      should "be an optional list" do
        assert_equal :list_optional, @query.available_work_package_filters["member_of_group"][:type]
      end

      should "have a list of the groups as values" do
        Group.destroy_all # No fixtures
        group1 = Group.generate!.reload
        group2 = Group.generate!.reload

        expected_group_list = [
                               [group1.name, group1.id.to_s],
                               [group2.name, group2.id.to_s]
                              ]
        assert_equal expected_group_list.sort, @query.available_work_package_filters["member_of_group"][:values].sort
      end

    end

    context "'assigned_to_role' filter" do
      should "be present" do
        assert @query.available_work_package_filters.keys.include?("assigned_to_role")
      end

      should "be an optional list" do
        assert_equal :list_optional, @query.available_work_package_filters["assigned_to_role"][:type]
      end

      should "have a list of the Roles as values" do
        assert @query.available_work_package_filters["assigned_to_role"][:values].include?(['Manager','1'])
        assert @query.available_work_package_filters["assigned_to_role"][:values].include?(['Developer','2'])
        assert @query.available_work_package_filters["assigned_to_role"][:values].include?(['Reporter','3'])
      end

      should "not include the built in Roles as values" do
        assert ! @query.available_work_package_filters["assigned_to_role"][:values].include?(['Non member','4'])
        assert ! @query.available_work_package_filters["assigned_to_role"][:values].include?(['Anonymous','5'])
      end

    end

    context "'watcher_id' filter" do
      context "globally" do
        context "for an anonymous user" do
          should "not be present" do
            assert ! @query.available_work_package_filters.keys.include?("watcher_id")
          end
        end

        context "for a logged in user" do
          setup do
            User.current = User.find 1
          end

          teardown do
            User.current = nil
          end

          should "be present" do
            assert @query.available_work_package_filters.keys.include?("watcher_id")
          end

          should "be a list" do
            assert_equal :list, @query.available_work_package_filters["watcher_id"][:type]
          end

          should "have a list of active users as values" do
            assert @query.available_work_package_filters["watcher_id"][:values].include?(["<< me >>", "me"])
            assert @query.available_work_package_filters["watcher_id"][:values].include?(["John Smith", "2"])
            assert @query.available_work_package_filters["watcher_id"][:values].include?(["Dave Lopper", "3"])
            assert @query.available_work_package_filters["watcher_id"][:values].include?(["redMine Admin", "1"])
            assert @query.available_work_package_filters["watcher_id"][:values].include?(["User Misc", "8"])
          end

          should "not include active users not member of any project" do
            assert ! @query.available_work_package_filters["watcher_id"][:values].include?(['Robert Hill','4'])
          end

          should "not include locked users as values" do
            assert ! @query.available_work_package_filters["watcher_id"][:values].include?(['Dave2 Lopper2','5'])
          end

          should "not include the anonymous user as values" do
            assert ! @query.available_work_package_filters["watcher_id"][:values].include?(['Anonymous','6'])
          end
        end
      end

      context "in a project" do
        setup do
          @query.project = Project.find(1)
        end

        context "for an anonymous user" do
          should "not be present" do
            assert ! @query.available_work_package_filters.keys.include?("watcher_id")
          end
        end

        context "for a logged in user" do
          setup do
            User.current = User.find 1
          end

          teardown do
            User.current = nil
          end

          should "be present" do
            assert @query.available_work_package_filters.keys.include?("watcher_id")
          end

          should "be a list" do
            assert_equal :list, @query.available_work_package_filters["watcher_id"][:type]
          end

          should "have a list of the project members as values" do
            assert @query.available_work_package_filters["watcher_id"][:values].include?(["<< me >>", "me"])
            assert @query.available_work_package_filters["watcher_id"][:values].include?(["John Smith", "2"])
            assert @query.available_work_package_filters["watcher_id"][:values].include?(["Dave Lopper", "3"])
          end

          should "not include non-project members as values" do
            assert ! @query.available_work_package_filters["watcher_id"][:values].include?(["redMine Admin", "1"])
          end

          should "not include locked project members as values" do
            assert ! @query.available_work_package_filters["watcher_id"][:values].include?(['Dave2 Lopper2','5'])
          end

          should "not include the anonymous user as values" do
            assert ! @query.available_work_package_filters["watcher_id"][:values].include?(['Anonymous','6'])
          end
        end
      end
    end
  end

  context "#statement" do
    context "with 'member_of_group' filter" do
      setup do
        Group.destroy_all # No fixtures
        @user_in_group = User.generate!
        @second_user_in_group = User.generate!
        @user_in_group2 = User.generate!
        @user_not_in_group = User.generate!

        @group = Group.generate!.reload
        @group.users << @user_in_group
        @group.users << @second_user_in_group

        @group2 = Group.generate!.reload
        @group2.users << @user_in_group2

        @empty_group = Group.generate!.reload
      end

      should "search assigned to for users in the group" do
        @query = Query.new(:name => '_')
        @query.add_filter('member_of_group', '=', [@group.id.to_s])

        assert_query_statement_includes @query, "#{WorkPackage.table_name}.assigned_to_id IN ('#{@user_in_group.id}','#{@second_user_in_group.id}')"
        assert_find_issues_with_query_is_successful @query
      end

      should "search not assigned to any group member (none)" do
        @query = Query.new(:name => '_')
        @query.add_filter('member_of_group', '!*', [''])

        # Users not in a group
        assert_query_statement_includes @query, "#{WorkPackage.table_name}.assigned_to_id IS NULL OR #{WorkPackage.table_name}.assigned_to_id NOT IN ('#{@user_in_group.id}','#{@second_user_in_group.id}','#{@user_in_group2.id}')"
        assert_find_issues_with_query_is_successful @query
      end

      should "search assigned to any group member (all)" do
        @query = Query.new(:name => '_')
        @query.add_filter('member_of_group', '*', [''])

        # Only users in a group
        assert_query_statement_includes @query, "#{WorkPackage.table_name}.assigned_to_id IN ('#{@user_in_group.id}','#{@second_user_in_group.id}','#{@user_in_group2.id}')"
        assert_find_issues_with_query_is_successful @query
      end

      should "return no results on empty set" do
        @query = Query.new(:name => '_')
        @query.add_filter('member_of_group', '=', [@empty_group.id.to_s])

        assert_query_statement_includes @query, "(0=1)"
        assert find_issues_with_query(@query).empty?
      end

      should "return results on disallowed empty set" do
        @query = Query.new(:name => '_')
        @query.add_filter('member_of_group', '!', [@empty_group.id.to_s])

        assert_query_statement_includes @query, "(1=1)"
        assert_find_issues_with_query_is_successful @query
      end
    end

    context "with 'assigned_to_role' filter" do
      setup do
        # No fixtures
        MemberRole.delete_all
        Member.delete_all
        Role.delete_all

        @manager_role = Role.generate!(:name => 'Manager')
        @developer_role = Role.generate!(:name => 'Developer')
        @empty_role = Role.generate!(:name => 'Empty')

        @project = Project.generate!
        @manager = User.generate!
        @developer = User.generate!
        @boss = User.generate!
        User.add_to_project(@manager, @project, @manager_role)
        User.add_to_project(@developer, @project, @developer_role)
        User.add_to_project(@boss, @project, [@manager_role, @developer_role])
      end

      should "search assigned to for users with the Role" do
        @query = Query.new(:name => '_')
        @query.add_filter('assigned_to_role', '=', [@manager_role.id.to_s])

        assert_query_statement_includes @query, "#{WorkPackage.table_name}.assigned_to_id IN ('#{@manager.id}','#{@boss.id}')"
        assert_find_issues_with_query_is_successful @query
      end

      should "search assigned to for users not assigned to any Role (none)" do
        @query = Query.new(:name => '_')
        @query.add_filter('assigned_to_role', '!*', [''])

        assert_query_statement_includes @query, "#{WorkPackage.table_name}.assigned_to_id IS NULL OR #{WorkPackage.table_name}.assigned_to_id NOT IN ('#{@manager.id}','#{@developer.id}','#{@boss.id}')"
        assert_find_issues_with_query_is_successful @query
      end

      should "search assigned to for users assigned to any Role (all)" do
        @query = Query.new(:name => '_')
        @query.add_filter('assigned_to_role', '*', [''])

        assert_query_statement_includes @query, "#{WorkPackage.table_name}.assigned_to_id IN ('#{@manager.id}','#{@developer.id}','#{@boss.id}')"
        assert_find_issues_with_query_is_successful @query
      end

      should "return no results on empty set" do
        @query = Query.new(:name => '_')
        @query.add_filter('assigned_to_role', '=', [@empty_role.id.to_s])

        assert_query_statement_includes @query, "(0=1)"
        assert find_issues_with_query(@query).empty?
      end

      should "return results on disallowed empty set" do
        @query = Query.new(:name => '_')
        @query.add_filter('assigned_to_role', '!', [@empty_role.id.to_s])

        assert_query_statement_includes @query, "(1=1)"
        assert_find_issues_with_query_is_successful @query
      end
    end
  end

end