我很难找出测试失败的原因:
describe User, "Instance Methods" do
describe "leave_group!" do
it "should set group_id to nil" do
@user = Factory(:user)
@group_2 = Factory(:group, :owner => @user)
@user.leave_group!
@user.reload.group_id.should be_nil # THIS LINE IS FAILING!!!
end
it "should assign another owner to group, if owner was user" do
@user = Factory(:user)
@group = Factory(:group, :owner => @user)
1.upto(4) { @group.add_user Factory(:user) }
@user.leave_group!
@group.reload.owner.should_not eql(@user)
end
end
end
这些是我正在使用的模型:
class User < ActiveRecord::Base
# Associations
has_one :own_group, :class_name => "Group", :foreign_key => "owner_id"
belongs_to :group
def leave_group!
current_group_id, current_group_owner = self.group.id, self.group.owner
self.group_id = nil
save!
Group.find(current_group_id).randomize_owner! if current_group_owner == self
end
end
class Group < ActiveRecord::Base
# Associations
has_many :users
belongs_to :owner, class_name: "User"
def randomize_owner!
current_users = self.users
return false unless current_users.length > 1
begin
new_user = current_users.sort_by { rand }.first
end while self.owner == new_user
self.owner_id = new_user.id
save!
end
end
我在这里做错了吗?我可以改进它吗?更重要的是,为什么单个测试会失败?
这是运行该单个测试的日志输出:
SQL (0.2ms) SELECT name
FROM sqlite_master
WHERE type = 'table' AND NOT name = 'sqlite_sequence'
AREL (0.3ms) INSERT INTO "users" ("name", "uid", "provider", "email", "image_url", "group_id", "created_at", "updated_at", "timezone", "public_readings", "is_visible_on_leaderboards", "phone_number") VALUES ('John Doe', '314159265', 'facebook', 'john@does.com', NULL, NULL, '2011-07-18 02:02:08.455229', '2011-07-18 02:02:08.455229', NULL, 't', 't', NULL)
Group Load (0.1ms) SELECT "groups".* FROM "groups" WHERE "groups"."key" = 'SNYEMJ' LIMIT 1
AREL (0.1ms) INSERT INTO "groups" ("name", "key", "score", "owner_id", "created_at", "updated_at") VALUES ('John''s Group', 'SNYEMJ', 0, 1, '2011-07-18 02:02:08.522442', '2011-07-18 02:02:08.522442')
AREL (0.0ms) UPDATE "users" SET "group_id" = 1, "updated_at" = '2011-07-18 02:02:08.524342' WHERE "users"."id" = 1
Group Load (0.1ms) SELECT "groups".* FROM "groups" WHERE "groups"."id" = 1 LIMIT 1
User Load (0.2ms) SELECT "users".* FROM "users" WHERE ("users".group_id = 1)
User Load (0.2ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 LIMIT 1
最后 3 行都是选择,注意 rails 甚至没有尝试从用户中删除 group_id。(有 2 个插入,1 个用于测试用户,1 个用于测试组,1 个更新将 group_id 分配给测试用户)。