RSpec:在每个上下文后刷新表/销毁对象

Question

如何删除您创建的对象(在数据库和内存中)

• 每次测试后
• 和每个上下文后？(在上下文中,彼此构建测试是有意义的)

有自动执行此操作的方法吗？

我有以下问题:

每个测试都将条目保存到数据库中.然后,下一个测试取决于这些条目.即使我想构建依赖于其他测试的测试,我也不能,因为测试执行的顺序是不可控的.

factories.rb:

sequence(:name) { |n| "purchaser #{n}" }      

organization_spec.rb:

context "when no supplier exists" do
  it "finds no associated suppliers" do
    purchaser = create(:organization_purchaser)                
    purchaser.partners.empty?.should == true
  end
end

context "when one supplier exists" do
  it "finds one associated suppliers" do
    purchaser = create(:organization_purchaser)      
    supplier = create(:organization_supplier)
    partnership = create(:partnership, organization: purchaser, partner: supplier)         
    purchaser.partners.last.name.should == "purchaser 1"
  end
end

context "when two suppliers exist" do        
  it "finds two associated suppliers" do
    purchaser = create(:organization_purchaser)      
    2.times do |i|
      supplier = create(:organization_supplier)
      partnership = create(:partnership, organization: purchaser, partner: supplier) 
    end    
    purchaser.partners.last.name.should == "purchaser 2"
  end
end

RSpec输出:

Organization
  #suppliers_for_purchaser
    responds
    when no supplier exists
      finds no associated suppliers
    when two suppliers exist
      finds two associated suppliers
    when one supplier exists
      finds one associated suppliers (FAILED - 1)

Failures:

1) Organization#suppliers_for_purchaser when one supplier exists finds one associated suppliers
 Failure/Error: purchaser.partners.last.name.should == "purchaser 1"
   expected: "purchaser 1"
        got: "purchaser 3" (using ==)

Answer 1

您应该使用Database Cleaner

您所要做的就是将以下代码添加到Rspec配置文件中 spec_helper.rb

config.before(:suite) do
  DatabaseCleaner.strategy = :transaction
  DatabaseCleaner.clean_with(:truncation)
end

config.before(:each) do
  DatabaseCleaner.start
end

config.after(:each) do
  DatabaseCleaner.clean
end

UPDATE

从Rails 5.1开始,如果您使用,则不需要 config.use_transactional_tests

https://github.com/rails/rails/pull/19282

Answer 2

你尝试过添加before方法吗？

describe MyController do

before(:each) do
  User.delete_all
  MyOtherModel.delete_all
  ...
end