ruby - 如何在 rspec 中测试 .sample 方法？

Question

我正在用 rspec 编写测试:

it "should choose a sign at random" do
  game.choose_sign
  expect(game.choose_sign).to eq "rock"
end

ruby 代码:

def choose_sign
  ["rock","paper","scissor"].sample
end

The code works but the test only passes when one of the values has been selected that matches whatever I put in the rspec test i.e. eq "rock"

如何让它每次都通过？这对于将来测试随机返回值时的引用非常有用。

Answer 1

您可以测试预期的集合包括您的方法的结果:

it "chooses a random sign" do
  expect(["rock","paper","scissor"]).to include(game.choose_sign)
end