2019-10-09 admin


什么是tap-yaml,Yaml handling for TAP parsers and generators



Yaml handling for TAP parsers and generators


const yaml = require('tap-yaml')

const str = yaml.stringify(someObject)
const obj = yaml.parse(someString)

This is essentially a re-export of the yaml package, with a few custom types and default properties to be more suitable for use in tap.

  1. Symbol types are added, so that they don’t throw. Shared symbols will (within the same process) retain the same Symbol identity through encoding and decoding. Unshared symbols will not retain their object identity.
  2. A “safe” !function type is added. Functions aren’t parsed to actual functions using eval(), since that’s obviously a Bad Idea, but they do parse to an empty function with a toString() that contains the original string source.
  3. An Error type is added, which does its best to maintain its properties, and always shows message, stack, and name, even if these are non-enumerable. If an Error has a custom inspect method that returns an object, then that is used as the source of extra properties, so you may filter out what gets dumped to your TAP stream.
  4. Binary types are implicitly allowed in a standard way. In Node.js, this means that a Buffer object is created, and Buffers can be dumped to YAML without any weirdness.
  5. omap and set are configured to refer to Map and Set objects.
  6. Objects with a null prototype maintain their null-prototyped-ness.
  7. Domain objects are stringified, but without their giant object graph, since that’s often a performance issue.
  8. Date objects are given a non-default !date tag rather than the default YAML 1.1 !timestamp, so that they maintain their explicit date object nature through stringifying and re-parsing.
  9. The prettyErrors option is always enabled.


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