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babel-plugin-undecorate

v1.0.4

Published

remove class+method decorators for testing, but keep them in your code!

Downloads

7

Readme

babel-plugin-undecorate

Remove class+method decorators for testing, but keep them in your code!

Decorators are quite popular and are finally on their way to being here to stay: https://github.com/tc39/proposal-decorators#69

However there seem to as of yet be no good ways to access the underlying decorated classes/methods for unit tests. All sources seem to suggest getting rid of our lovely decorators!

https://hackernoon.com/unit-testing-redux-connected-components-692fa3c4441c https://stackoverflow.com/questions/37798741/nested-components-testing-with-enzyme-inside-of-react-redux https://hacks.mozilla.org/2018/04/testing-strategies-for-react-and-redux/

This package attempts to address this issue by automatically exporting a copy (not a reference) to the underlying classes+methods (see below).

Can either copy all classes with decorators (with the decorators removed) or target specific decorators.

Note that this package only looks for decorators on "Export" nodes at present (so if you were to assign a decorated class to a variable and export the variable it would not work).

NPM

Example Usage

.babelrc

{
  "env": {
    "test": { // babel overrides for specifically when process.env.NODE_ENV = "test"
      "plugins": [
        ["undecorate", {
          "specifically": ["anyOldClassDecorator", "anyOldMethodDecorator"]
        }],
        "transform-decorators-legacy", // this must come after 'undecorate'
        ... // ...other plugins
      ]
    }
  }
}

input

@anyOldClassDecorator
export default class AnyOldClass {
  @anyOldMethodDecorator
  method() {
    console.log('hello');  	
  }

  @whatAboutThisGuy
  method2() {
  }
}

@anyOldClassDecorator
export class AnotherClass {
  @anyOldMethodDecorator
  method() {
    console.log('hello');  	
  }
}

output

@anyOldClassDecorator
export default class AnyOldClass {
  @anyOldMethodDecorator
  method() {
    console.log('hello');  	
  }

  @whatAboutThisGuy
  method2() {
    console.log('hello2');
  }
}

export class __undecorated__AnyOldClass {
  method() {
    console.log('hello');  	
  }

  @whatAboutThisGuy
  method2() {
    console.log('hello2');
  }
}

@anyOldClassDecorator
export class AnotherClass {
  @anyOldMethodDecorator
  method() {
    console.log('hello');  	
  }
}

export class __undecorated__AnotherClass {
  method() {
    console.log('hello');  	
  }
}

Options

specifically (default: undefined)

Allows only removing specific decorators (by name), if not passed in plugin will remove all decorators.

undecoratedPrefix (default: "undecorated")

The string which class exports that have been undecorated will be prepended with.