ruby-on-rails – 如何构建我的RSpec测试文件夹,文件和数据库？

对于标准模型/控制器测试,我通常没有任何问题,但问题是我想测试一些复杂的功能过程,并不真正知道如何构建我的测试文件夹/文件/数据库.

这是我的应用程序的基本结构：

class Customer
  has_one    :wallet
  has_many :orders    
  has_many :invoices,through: :orders
  has_many :invoice_summaries
end

class Wallet
  belongs_to :customer
end

class Order
  has_one    :invoice
  belongs_to :customer
end

class Invoice
  belongs_to :order
  belongs_to :invoice_summary
end

class InvoiceSummary
  belongs_to :customer
  has_many  :invoices
end

主要的问题是我想模拟我对象的生命周期,意思是：

>实例化用于所有测试的客户和钱包(无需重新初始化)
>模拟时间流程,创建和更新多个订单/发票对象和一些invoice_summaries.

对于订单/发票/ invoice_summaries的创建和更新,我想有一些方法

def create_order_1
  # code specific to create my first order,return the created order
end

def create_order_2
  # code specific to create my second order,return the created order
end
.
.
.
def create_order_n
  # code specific to create my n-th order,return the created order
end

def bill_order(order_to_bill)
  # generic code to do the billing of the order passed as parameter
end

def cancel_order(order_to_cancel)
  # generic code to cancel the order passed as parameter
end

我已经找到了用于模拟时间流的宝石Timecop.因此,我想要一个容易理解的最终测试

# Code for the initialization of customers and wallets object

describe "Wallet should be equal to 0 after first day" do
  Timecop.freeze(Time.new(2015,7,1))
  first_request = create_request_1
  first_request.customer.wallet.value.should? == 0
end

describe "Wallet should be equal to -30 after second day" do
  Timecop.freeze(Time.new(2015,2))
  bill_order(first_request)
  second_order = create_order_2
  first_request.customer.wallet.value.should? == -30
end

describe "Wallet should be equal to -20 after third day" do 
  Timecop.freeze(Time.new(2015,3))
  bill_order(second_request)
  cancel_order(first_request)
  first_request.customer.wallet.value.should? == -20
end

describe "Three first day invoice_summary should have 3 invoices" do
  Timecop.freeze(Time.new(2015,4))
  invoice_summary = InvoiceSummary.create(
      begin_date: Date.new(2015,1),end_date: Date.new(2015,3)
  ) # real InvoiceSummary method
  invoice_summary.invoices.count.should? == 3
end

有没有人有这样的测试？对象工厂的结构,写作测试等都有很好的做法吗？

例如,我被告知,一个好主意是将客户/电子钱包创建放在一个db / seed.rb文件中,但我不知道该怎么做.