/**
* @module helpers
*/
/**
* ```
* // CommonJS
* const {getHelper} = require('hexo-test-utils')
*
* // ES2015
* import {getHelper} from 'hexo-test-utils'
* ```
*
* Retrieves a helper function.
* Read the Hexo documentation on [how to register a helper](https://hexo.io/api/helper.html)
*
* @param {HexoContext} ctx
* @param {string} name - helper name
* @return {Function|null} - a helper function
*/
export function getHelper(ctx, name) {
const helper = ctx.extend.helper.get(name)
if (!helper) {
return null
}
return helper.bind(ctx)
}
/**
* ```
* // CommonJS
* const {hasHelper} = require('hexo-test-utils')
*
* // ES2015
* import {hasHelper} from 'hexo-test-utils'
* ```
* @param {HexoContext} ctx
* @param {string} name - helper name
* @returns {boolean}
*/
export function hasHelper(ctx, name) {
return typeof getHelper(ctx, name) !== 'undefined'
}