Commits on Jul 18, 2020

1. feat: Support enhancing React component serializer …

   snapshot-diff provides a convenience serializer for React components
   which renders them and serializes them before diffing. Support is
   already in place for allowing custom serializers to be added which will
   work at the root level; serializing unknown types (e.g. React component
   rendered with Enzyme).
   
   However, there is no ability to update the serializers used within the
   React component serializer. The use case for this need to when a
   CSS-in-JS solution, such as Emotion, is used and custom serilization
   is required to support outputting the styles attached. Emotion provides
   this serializer, but adding at the root level then only outputs the
   styles and does not output the component.
   
   To support this, the same `defaultSerializers` and `setSerializers` API
   as provided by `snapshot-diff` for adding root level serializers has
   been applied to the React component serializer to allow
   "sub-serializers" to be added which will then be passed into
   `pretty-format`. This then provides an API which will allow the Emotion
   serializer to work as expected with the rest of the React component
   serialization process.
   
   Fixes jest-community#162

   

   alistairjcbrown committed Jul 18, 2020
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