Rspec 检查输入是否在 1-4 范围内的测试工作一次然后失败

Question

无论我输入什么，我的 rspec 测试都失败了。我正在运行测试以确保输入在 1-4 之间而且它似乎只有在我输入 3 时才有效？

require 'order'
describe Order do
  it 'gets dish input' do
    order = Order.new
    allow(order.input).to receive(:gets).and_return(:name)
  end

  it 'checks input' do
    order = Order.new
    expect(order.input).to eq (1..4)
  end 
end

呼叫order.rb

class Order
  def initialize
    input
  end

  def input
    puts 'please select the number of your dish'
    gets.chomp
  end

  def valid_range? input
    input.to_i.between?(1..4)
  end
end

谢谢

Answer 1

您可以将 Order class 写为：

class Order
  attr_reader :dish_number

  def initialize
    @dish_number = input.to_i
  end

  def valid_dish?
    dish_number.between?(1, 4)
  end

  private

  def input
    puts 'please select the number of your dish'
    gets.chomp
  end
end

对应的规格应该是：

require_relative '../order.rb'

describe Order do
  it 'gets dish number as input' do
    allow_any_instance_of(Order).to receive(:input).and_return("1")
    order = Order.new
    expect(order.dish_number).to eq(1)
  end

  it 'checks valid dish' do
    allow_any_instance_of(Order).to receive(:input).and_return("1")
    order = Order.new
    expect(order).to be_valid_dish
  end 
end

结果是：

[arup@Ruby]$ rspec spec/order_spec.rb
..

Finished in 0.00946 seconds (files took 0.12904 seconds to load)
2 examples, 0 failures
[arup@Ruby]$

正如所说，这里是代码的 DRY 版本：

require_relative '../order.rb'

describe Order do
  def new_order(input)
    order = Order.new
    allow(order).to receive(:input).and_return(input)
    order
  end

  it 'gets dish number as input' do
    expect(new_order("1").dish_number).to eq(1)
  end

  it 'checks valid dish' do
    expect(new_order("1")).to be_valid_dish
  end 
end

Rspec 检查输入是否在 1-4 范围内的测试工作一次然后失败

Rspec test to check input is within range 1-4 works once then fails

ruby

rspec

range