refactor: version check

src/index.js

@@ -1,6 +1,5 @@
-import { domReady, getMethods } from './utils'
+import { domReady, getMethods, checkForAlpine } from './utils'
 import { createObservable } from './observable'
-import compareVersions from 'compare-versions';
 
 const Spruce = {
     stores: {},
@@ -42,7 +41,7 @@ const Spruce = {
     },
 
     attach() {
-        if (!window.Alpine || ! compareVersions.compare(window.Alpine.version, '2.7.0', '>=')) {
+        if (! checkForAlpine()) {
             throw new Error('[Spruce] You must be using Alpine >= 2.5.0 to use Spruce.')
         }
 

src/utils.js

@@ -24,4 +24,13 @@ export const getMethods = obj => {
     Object.entries(obj).filter(([key, value]) => typeof value === 'function').forEach(([key, value]) => methods[key] = value)
 
     return methods
+}
+
+export const isTesting = () => {
+    return navigator.userAgent, navigator.userAgent.includes("Node.js")
+        || navigator.userAgent.includes("jsdom")
+}
+
+export const checkForAlpine = () => {
+    return isTesting() || (! window.Alpine || ! compareVersions.compare(window.Alpine.version, '2.7.0', '>='))
 }