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[![power-assert][power-assert-banner]][power-assert-url]
[![Build Status][travis-image]][travis-url]
[![NPM version][npm-image]][npm-url]
[![License][license-image]][license-url]
`powerAssertContext` reducer function to parse assertion expression at runtime.
Use this function when transpiler side does not add `ast`, `tokens` and `visitorKeys` at compile time.
API
---------------------------------------
### var appendAst = require('power-assert-context-reducer-ast');
### var appendedContext = appendAst(powerAssertContext);
Given `powerAssertContext` object, having structure below but does not have `ast`, `tokens` and `visitorKeys`, append them to output context.
input:
```js
{
source: {
content: 'assert(foo === bar)',
filepath: 'test/some_test.js',
line: 1
},
args: [
{
value: false,
events: [
{
value: "FOO",
espath: "arguments/0/left"
},
{
value: "BAR",
espath: "arguments/0/right"
},
{
value: false,
espath: "arguments/0"
}
]
}
]
}
```
output:
```js
{
source: {
content: 'assert(foo === bar)',
filepath: 'test/some_test.js',
line: 1,
ast: '### JSON representation of AST nodes ###',
tokens: '### JSON representation of AST tokens ###',
visitorKeys: '### JSON representation of AST visitor keys ###'
},
args: [
{
value: false,
events: [
{
value: "FOO",
espath: "arguments/0/left"
},
{
value: "BAR",
espath: "arguments/0/right"
},
{
value: false,
espath: "arguments/0"
}
]
}
]
}
```
INSTALL
---------------------------------------
```sh
$ npm install --save-dev power-assert-context-reducer-ast
```
AUTHOR
---------------------------------------
* [Takuto Wada](https://github.com/twada)
CONTRIBUTORS
---------------------------------------
* [Haoliang Gao (popomore)](https://github.com/popomore)
LICENSE
---------------------------------------
Licensed under the [MIT](https://github.com/twada/power-assert-runtime/blob/master/LICENSE) license.
[power-assert-url]: https://github.com/power-assert-js/power-assert
[power-assert-banner]: https://raw.githubusercontent.com/power-assert-js/power-assert-js-logo/master/banner/banner-official-fullcolor.png
[travis-url]: https://travis-ci.org/twada/power-assert-runtime
[travis-image]: https://secure.travis-ci.org/twada/power-assert-runtime.svg?branch=master
[npm-url]: https://npmjs.org/package/power-assert-context-reducer-ast
[npm-image]: https://badge.fury.io/js/power-assert-context-reducer-ast.svg
[license-url]: https://github.com/twada/power-assert-runtime/blob/master/LICENSE
[license-image]: https://img.shields.io/badge/license-MIT-brightgreen.svg