RSpec的测试自定义验证

Question

我在我的模型如下验证：

class ContinuumValidator < ActiveModel::Validator 
    def validate(record) 
    if !record.end_time.nil? and record.end_time < record.start_time 
     record.errors[:base] << "An event can not be finished if it did not start yet..." 
    end 
    end 
end 

class Hrm::TimeEvent < ActiveRecord::Base 
    validates_with ContinuumValidator 
end 

如何使用Rspec的我测试它？

这里是我到目前为止已经试过：（感谢zetetic）

describe "validation error" do 
    before do 
    @time_event = Hrm::TimeEvent.new(start_time: "2012-10-05 10:00:00", end_time: "2012-10-05 09:00:00", event_type: 2) 
    end 

    it "should not be valid if end time is lower than start time" do 
    @time_event.should_not be_valid 
    end 

    it "raises an error if end time is lower than start time" do 
    @time_event.errors.should include("An event can not be finished if it did not start yet...") 
    end 
end 

，但我得到了以下错误：

1) Hrm::TimeEvent validation error raises an error if end time is lower than start time 
    Failure/Error: @time_event.errors.should include("An event can not be finished if it did not start yet...") 

    expected #<ActiveModel::Errors:0x007fd1d8e02c50 @base=#<Hrm::TimeEvent id: nil, start_time: "2012-10-05 08:00:00", end_time: "2012-10-05 07:00:00", event_type: 2, employee_id: nil, created_at: nil, updated_at: nil, not_punched: false, validated: false, replace_id: nil>, @messages={}> to include "An event can not be finished if it did not start yet..." 

    Diff: 
    @@ -1,2 +1,5 @@ 
    -["An event can not be finished if it did not start yet..."] 
    +#<ActiveModel::Errors:0x007fd1d8e02c50 
    + @base= 
    + #<Hrm::TimeEvent id: nil, start_time: "2012-10-05 08:00:00", end_time: "2012-10-05 07:00:00", event_type: 2, employee_id: nil, created_at: nil, updated_at: nil, not_punched: false, validated: false, replace_id: nil>, 
    + @messages={}> 

我在做什么错？我怎样才能达到我的目标？ 任何帮助或建议，将不胜感激。 谢谢。

Answer 1

的问题是，你希望@time_event.errors表现得像一个字符串数组。它不，它返回ActiveModel :: Errors。正如其他人所指出的，你还需要触发一个调用验证到valid?：

it "raises an error if end time is lower than start time" do 
    @time_event.valid? 
    @time_event.errors.full_messages.should include("An event can not be finished if it did not start yet...") 
end 

Answer 2

没有错误，因为您没有调用触发错误的事件。这通常在创建或保存记录时发生。您可能不希望击中数据库在您的测试，虽然，然后你可以使用这样的方法valid?：

it "raises an error if end time is lower than start time" do 
    @time_event.valid? 
    @time_event.errors.should include("An event can not be finished if it did not start yet...") 
end 

我个人会把这两项测试为一体，因为有效吗？在第一种情况下被称为。

也是次要的：if record.end_time比if !record.end_time.nil?好。 （在我看来，至少...... :-)）

Answer 3

我认为记录没有验证，因此validatior没有运行，也没有发现错误。你可以在代码输出中看到它。 “验证：假”

尝试：

it "raises an error if end time is lower than start time" do 
    @time_event.valid? 
    @time_event.errors.should include("An event can not be finished if it did not start yet...") 
end 

Answer 4

您还没有测试验证实际，再加上我会建议你做一个规范。

describe "validation error" do 
    before { @time_event = Hrm::TimeEvent.new(start_time: "2012-10-05 10:00:00", end_time: "2012-10-05 09:00:00", event_type: 2) } 

    it "raises an error if end time is lower than start time" do 
    @time_event.valid? 
    @time_event.errors.should include("An event can not be finished if it did not start yet...") 
    end 
end 

class ContinuumValidator < ActiveModel::Validator 
    def validate(record) 
    if record.end_time and record.end_time < record.start_time 
     record.error.add_to_base << "An event can not be finished if it did not start yet..." 
    end 
    end 
end 

Answer 5

该解决方案对我的作品（使用Mongoid）：

模型

class OpLog 
... 
field :from_status, type: String 
field :to_status, type: String 
... 
validate :states_must_differ 

def states_must_differ 
    if self.from_status == self.to_status 
    errors.add(:from_status, "must differ from 'to_status'") 
    errors.add(:to_status, "must differ from 'from_status'") 
    end 
end 
... 
end 

测试：

it 'is expected to have different states' do 
    expect { create(:oplog, from_status: 'created', to_status: 'created').to raise_error(Mongoid::Errors::Validations) } 
end 

所以你的情况我d写这样的测试（如果使用ActiveRecord）：

it 'raises an error if end time is lower than start time' do 
    expect { create(Hrm::TimeEvent.new(start_time: "2012-10-05 10:00:00", end_time: "2012-10-05 09:00:00", event_type: 2)) }.to raise_error(ActiveRecord::Errors) 
end