ruby 使用 RSpec 测试哈希内容
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Testing hash contents using RSpec
提问by steve_gallagher
I have a test like so:
我有一个这样的测试：
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
which, I know, is verbose. Is there a more concise way to state my expectations. I've looked at the docs but I can't see where to compress my expectations. Thanks.
我知道，这是冗长的。有没有更简洁的方式来表达我的期望。我看过文档，但我看不到在哪里压缩我的期望。谢谢。
回答by David Chelimsky
http://rubydoc.info/gems/rspec-expectations/RSpec/Matchers:include
http://rubydoc.info/gems/rspec-expectations/RSpec/Matchers:include
It works for hashes too:
它也适用于哈希：
jump_locations.should include(
"upper_left" => true,
"upper_right" => false,
"lower_left" => false,
"lower_right" => true
)
回答by Benjamin Cheah
Just wanna add to @David's answer. You could nest and use matchers in your includehash. For example:
只想添加到@David 的答案中。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)
}
})
A caveat: a nested includehash must test all keys or the test will fail, e.g.:
警告：嵌套include散列必须测试所有键，否则测试将失败，例如：
# Fail
expect({
"a" => {
"b" => 1,
"c" => 2
}
}).to include({
"a" => {
"b" => 1
}
})
回答by Marko Avlija?
Syntax has changed for RSpec 3, but include matcher is still the one:
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
)
回答by Kiry Meas
Another easy way to test if the whole content is a Hash is to checkout if the content is the Hash Object itself:
测试整个内容是否为 Hash 的另一种简单方法是检查内容是否为 Hash 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
For the question above we can check as follow:
对于上面的问题，我们可以检查如下：
expect(adjusted_jump_locations).to match(hash_including('upper_left' => true))
