Allow location function to be passed in and not depend on window object

docs/core/SearchkitManager.md

@@ -30,6 +30,8 @@ const searchkit = new SearchkitManager(host, {
 
 * **createHistory** - A function which returns an instance of a history obj, defaults to `createBrowserHistory from history@4.6.1`
 
+* **getLocation** - A function which returns the current location which has to implement the LocationInterface {pathname:String,search:String}, defaults to `()=> window.location`
+
 * **searchUrlPath** - A the search endpoint name, defaults to `/_search`. Used if your server proxy endpoint needs a different url convention.
 ## Default Queries
 Sometimes we need to apply a default query which affects the entire search and is not serialized to the browser url.

src/core/SearchkitManager.ts

@@ -22,6 +22,7 @@ import {after} from "lodash"
 export interface SearchkitOptions {
   useHistory?:boolean,
   createHistory?:Function,
+  getLocation?:Function,
   searchOnLoad?:boolean,
   httpHeaders?:Object,
   basicAuth?:string,
@@ -67,7 +68,8 @@ export class SearchkitManager {
       useHistory:true,
       httpHeaders:{},
       searchOnLoad:true,
-      createHistory:createHistoryInstance
+      createHistory:createHistoryInstance,
+      getLocation:()=> window.location
     })
     this.host = host
 
@@ -154,7 +156,7 @@ export class SearchkitManager {
 
   runInitialSearch(){
     if(this.options.searchOnLoad) {
-      this._searchWhenCompleted(window.location)
+      this._searchWhenCompleted(this.options.getLocation())
     }
   }
 
@@ -172,15 +174,15 @@ export class SearchkitManager {
       const historyMethod = (replaceState) ?
         this.history.replace : this.history.push
 
-      let url = window.location.pathname + "?" + encodeObjUrl(this.state)
+      let url = this.options.getLocation().pathname + "?" + encodeObjUrl(this.state)
       historyMethod.call(this.history, url)
     }
   }
 
   buildSearchUrl(extraParams = {}){
     const params = defaults(extraParams, this.state || this.accessors.getState())
     const queryString = qs.stringify(params, { encode: true })
-    return window.location.pathname + '?' + queryString
+    return this.options.getLocation().pathname + '?' + queryString
   }
 
   reloadSearch(){