使用RSpec测试哈希内容

Question

我有这样的测试:

it "should not indicate backwards jumps if the checker position is not a king" do
    board = Board.new
    game_board = board.create_test_board
    board.add_checker(game_board, :red, 3, 3)
    x_coord = 3
    y_coord = 3
    jump_locations = {}
    jump_locations["upper_left"]  = true 
    jump_locations["upper_right"] = false 
    jump_locations["lower_left"]  = false
    jump_locations["lower_right"] = true
    adjusted_jump_locations = @bs.adjust_jump_locations_if_not_king(game_board, x_coord, y_coord, jump_locations)
    adjusted_jump_locations["upper_left"].should == true 
    adjusted_jump_locations["upper_right"].should == false 
    adjusted_jump_locations["lower_left"].should == false
    adjusted_jump_locations["lower_right"].should == false
  end 

我知道,这是冗长的.是否有更简洁的方式来陈述我的期望.我看过文档,但我看不出在哪里压缩我的期望.谢谢.

Answer 1

http://rubydoc.info/gems/rspec-expectations/RSpec/Matchers:include

它也适用于哈希:

jump_locations.should include(
  "upper_left" => true,
  "upper_right" => false,
  "lower_left" => false,
  "lower_right" => true
)

Answer 2

只想加入@ David的回答.您可以在include哈希中嵌套和使用匹配器.例如:

# Pass
expect({
  "num" => 5, 
  "a" => { 
    "b" => [3, 4, 5] 
  }
}).to include({
  "num" => a_value_between(3, 10), 
  "a" => {
    "b" => be_an(Array)
  }
})

需要注意的是:嵌套include哈希必须测试所有键,否则测试将失败,例如:

# Fail
expect({
  "a" => { 
    "b" => 1,
    "c" => 2
  }
}).to include({
  "a" => {
    "b" => 1
  }
})

Answer 3

RSpec 3 的语法已经改变，但包含匹配器仍然是一个：

expect(jump_locations).to include(
  "upper_left" => true,
  "upper_right" => false,
  "lower_left" => false,
  "lower_right" => true
)

请参阅内置匹配器#include-matcher。

Answer 4

测试整个内容是否是哈希的另一种简单方法是检查内容是否是哈希对象本身：

it 'is to be a Hash Object' do
    workbook = {name: 'A', address: 'La'}
    expect(workbook.is_a?(Hash)).to be_truthy
end

对于上面的问题我们可以检查如下：

it 'is to be a Hash Object' do
    workbook = {name: 'A', address: 'La'}
    expect(workbook.is_a?(Hash)).to be_truthy
end