RSpec - 日期应该在两个日期之间

Question

如何测试日期以查看它是否在两个日期之间？我知道我可以进行两次大于和小于比较,但我想要一种RSpec方法来检查日期的"好坏".

例如:

it "is between the time range" do
    expect(Date.now).to be_between(Date.yesterday, Date.tomorrow)
end

我试过expect(range).to cover(subject)但没有运气.

Answer 1

Date.today.should be_between(Date.today - 1.day, Date.today + 1.day)

Answer 2

您编写的两种语法都是正确的RSpec:

it 'is between the time range' do
  expect(Date.today).to be_between(Date.yesterday, Date.tomorrow)
end

it 'is between the time range' do
  expect(Date.yesterday..Date.tomorrow).to cover Date.today
end

如果您不使用Rails,您将不会拥有Date::yesterday或Date::tomorrow定义.您需要手动调整它:

it 'is between the time range' do
  expect(Date.today).to be_between(Date.today - 1, Date.today + 1)
end

第一个版本的工作原因是RSpec的内置谓词匹配器.这个匹配器理解在对象上定义的方法,并委托它们以及可能的?版本.因为Date,谓词Date#between?来自包括Comparable(见链接).

第二个版本有效,因为RSpec定义了封面匹配器.