ruby-on-rails - 如何测试 Rails 中的记录顺序？

Question

我发现测试来自数据库的记录是否正确排序非常冗长乏味。我正在考虑使用数组“==”方法来比较两个搜索数组。数组的元素和顺序必须相同，所以看起来很合适。问题是如果元素缺失，即使它们严格正确排序，测试也会失败。

不知道有没有更好的方法...

Answer 1

rails 4

app/models/person.rb

default_scope { order(name: :asc) }

test/models/person.rb

test "people should be ordered by name" do
  xavier = Person.create(name: 'xavier')
  albert = Person.create(name: 'albert')
  all    = Person.all
  assert_operator all.index(albert), :<, all.index(xavier)
end

rails 3

app/models/person.rb

default_scope order('name ASC')

test/unit/person_test.rb

test "people should be ordered by name" do 
  xavier = Person.create name: 'xavier'
  albert = Person.create name: 'albert'
  assert Person.all.index(albert) < Person.all.index(xavier)
end