新闻 Jest 20.0.0 发布，JavaScript 单元测试工具 下载

Jest 20.0.0 发布了，Jest 是 Facebook 开源的无痛 JavaScript 测试工具。Jest 默认使用 Jasmine assertions，模块化，可扩展、可配置。Jest 也可以捕获 React 或其他可序列化值的快照，以便快速编写测试，并提供无缝的更新体验。

更新内容：

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  New --projects option to run one instance of Jest in multiple projects at the same time.
  
  
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  New multi project runner
  
  
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  New keyboard/arrow selection for watch mode typeaheads.
  
  
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  New --listTests flag.
  
  
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  New --showConfig flag.
  
  
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  New promise support for all expect matchers through .resolves and .rejects.
  
  
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  New expect.hasAssertions() function similar to expect.assertions().
  
  
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  New this.equals function exposed to custom matchers.
  
  
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  New valid-expect lint rule in eslint-plugin-jest.
  
  
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  New HtmlElement pretty-format plugin.
  
  
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  New Immutable pretty-format plugins.
  
  
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  New test environment per file setting through @jest-environment in the docblock.
  
  
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  New feature that allows every configuration option to be set from the command line.
  
  
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  New feature to add custom reporters to Jest through reporters in the configuration.
  
  
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  New feature to add expected and actual values to AssertionError.
  
  
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  New feature to map code coverage from transformers.
  
  
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  New feature to run untested code coverage in parallel.
  
  
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  New option to define a custom resolver.
  
  
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  New printing support for text and comment nodes in html pretty-format.
  

完整更新内容

下载地址：

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  Source code (zip)
  
  
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  Source code (tar.gz)
  

Jest 20.0.0 发布，JavaScript 单元测试工具下载地址