shoulda-matchers RSpec 期望语法 [英] shoulda-matchers RSpec expect syntax
问题描述
使用 shoulda-matchers 和 RSpec 的新 预期语法?
What is the correct format for using shoulda-matchers and RSpec's new expect syntax?
推荐答案
当然可以使用 shoulda-matchers 和新的 expect 语法如下:
While one could certainly use the shoulda-matchers with the new expect syntax as follows:
it 'should validate presence of :email' do
expect(subject).to validate_presence_of :email
end
或更简洁但可读性较差:
or the more concise but less readable:
it { expect(subject).to validate_presence_of :email }
这些匹配器通常使用的单行 should
格式在 2.14 中得到明确支持,即使 config.syntax == :expect
也是如此.当 should
与隐式主题一起使用时:
the one-liner should
format these matchers are typically used with is explicitly supported in 2.14 even when config.syntax == :expect
. When should
is being used with an implicit subject as in:
describe User
it { should validate_presence_of :email }
end
它不依赖应该
依赖的Kernel
的猴子补丁.
it does not rely on the monkey patching of Kernel
that should
otherwise depends on.
https://github.com/rspec/rspec-expectations/blob/master/Should.md.事实上,该文档甚至使用上面的 should
匹配器示例来说明此异常.
This is covered in https://github.com/rspec/rspec-expectations/blob/master/Should.md. In fact, that documentation even uses the above shoulda
matcher example to illustrate this exception.
另见使用隐式的`subject`和`expect`在 RSpec-2.11 中,它讨论了一个配置选项,可让您用作 it
的替代方案.
See also Using implicit `subject` with `expect` in RSpec-2.11, which discusses a configuration option which lets you use as an alternative to it
.
expect_it { to validate_presence_of :email }
更新:从 RSpec 3.0 (beta2) 开始,您还可以使用:
Update: As of RSpec 3.0 (beta2), you will also be able to use:
it { is_expected.to validate_presence_of :email }
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