有一种方法我想检查结果:
result.should == [1.0,2.0,3.0]
但我收到一个错误:
expected: [1.0, 2.0, 3.0]
got: [1.0, 2.0, 3.0] (using ==)
我认为问题在于四舍五入,但我不知道如何比较它们,例如偏差为 0.1。
谢谢,呼吸暂停。
我写了我自己的匹配器,如果它对某人有帮助:
RSpec::Matchers.define :be_closed_array do |expected, truth|
match do |actual|
same = 0
for i in 0..actual.length-1
same +=1 if actual[i].round(truth) == expected[i].round(truth)
end
same == actual.length
end
failure_message_for_should do |actual|
"expected that #{actual} would be close to #{expected}"
end
failure_message_for_should_not do |actual|
"expected that #{actual} would not be close to #{expected}"
end
description do
"be a close to #{expected}"
end
end
最佳答案
采用:
.should be_close
甚至:
.should be_within
引用这里 http://rubydoc.info/gems/rspec-expectations/2.4.0/RSpec/Matchers
关于ruby-on-rails - 比较浮点数组时 rspec 测试的舍入问题,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/6855944/