我是 Ruby 单元测试的新手,我在创建用于检查 STDOUT 的规范时遇到了一些问题。如果我正在测试的代码在类/方法中,我知道如何测试 STDOUT,但我只想测试来自不在类或方法中的常规 Ruby 文件的 puts
语句。
这是来自 my_file.rb
puts "Welcome to the Book Club!"
这是规范
my_spec.rb
require_relative 'my_file.rb'
describe "Something I'm Testing" do
it 'should print Welcome to the Book Club!' do
expect {$stdout}.to output("Welcome to the Book Club!\n").to_stdout
end
end
我收到以下错误消息:
Failures:
1) Something I'm Testing should print Welcome to the Book Club!
Failure/Error: expect {$stdout}.to output("Welcome to the Book Club!\n").to_stdout
expected block to output "Welcome to the Book Club!\n" to stdout, but output nothing
Diff:
@@ -1,2 +1 @@
-Welcome to the Book Club!
# ./spec/my_spec.rb:9:in `block (2 levels) in <top (required)>'
Finished in 0.01663 seconds (files took 0.08195 seconds to load)
1 example, 1 failure
Failed examples:
rspec ./spec/my_spec.rb:7 # Something I'm Testing should print Welcome to the Book Club!
我以为我可以只使用 $stdout
从 my_file.rb
中捕获 STDOUT,但这没有用。输出一直说什么都没有。我发现这篇文章谈到通过 StringIO
Testing STDOUT output in Rspec 捕获输出
但是那个方法对我不起作用。我做错了什么?
谢谢!
最佳答案
当您在顶部包含 my_file.rb
时,在您的测试运行之前调用您的 puts
方法。将其包含在您的测试中。
describe "Something I'm Testing" do
it 'should print Welcome to the Book Club!' do
expect { require_relative 'my_file.rb' }.to output("Welcome to the Book Club!\n").to_stdout
end
end
关于ruby - 在 RSpec 中捕获 STDOUT,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37309874/