Ruby 的 RSpec 测试替身中的#<foo> 和#[foo] 有什么区别？

Question

我为一个较旧的 Ruby 库做出了开源贡献，以修复上游依赖项更改的几个错误。我认为它运行良好并修补了问题，但是，RSpec 测试失败并显示一条我无法理解的错误消息。

.....................................F...........................

Failures:

  1) MagicAdmin::Resource::Token instance methods public methods #validate
     Failure/Error: validate_public_address!(rec_address, did_token)

       #<MagicAdmin::Resource::Token:0x00007fac020ff7c0> received :validate_public_address! with unexpected arguments
         expected: (#<Double "rec_address">, "WyIweHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAw...DAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDBcIn0iXQ==")
              got: ("#[Double \"rec_address\"]", "WyIweHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAw...DAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDBcIn0iXQ==")
       Diff:
       @@ -1 +1 @@
       -[#<Double "rec_address">,
       +["#[Double \"rec_address\"]",

     # ./lib/magic-admin/resource/token.rb:25:in `validate'
     # ./test/resource/token_test.rb:31:in `block (4 levels) in <top (required)>'
     # /Users/ajen/.rvm/gems/ruby-3.0.1/gems/webmock-3.14.0/lib/webmock/rspec.rb:37:in `block (2 levels) in <top (required)>'

Finished in 0.21978 seconds (files took 1.9 seconds to load)
65 examples, 1 failure

Failed examples:

rspec ./test/resource/token_test.rb:8 # MagicAdmin::Resource::Token instance methods public methods #validate

Coverage report generated for RSpec to /Users/ajen/pg/magic-admin-ruby/coverage. 633 / 643 LOC (98.44%) covered.
Stopped processing SimpleCov as a previous error not related to SimpleCov has been detected

这是一个永久的、深入的 link 问题测试：magic-admin-ruby/0b7c37e..633516b/test/resource/token_test.rb#L9-L31

具体来说，以下差异让我感到困惑：

@@ -1 +1 @@
-[#<Double "rec_address">,
+["#[Double \"rec_address\"]",

我该如何阅读？ Ruby 的 RSpec 测试双打中 #<foo> 和 #[foo] 有什么区别？

Answer 1

当我看这两行的时候

expected: (#<Double "rec_address">, "WyIweHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAw...DAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDBcIn0iXQ==")
     got: ("#[Double \"rec_address\"]", "WyIweHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAw...DAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDB0ZXN0MDAwMHRlc3QwMDAwdGVzdDAwMDBcIn0iXQ==")

那么看起来您期望 Double 的实例，但您得到了 Double 的 String 表示。注意第二行的值用双引号括起来，里面的引号转义了。

Ruby 的 RSpec 测试替身中的#<foo> 和#[foo] 有什么区别？

What's the difference between #<foo> and #[foo] in Ruby's RSpec test doubles?

ruby

testing

rspec