feat: setActiveStore for tests

Author: Akryum

packages/vue/src/plugin.ts

@@ -1,5 +1,5 @@
-import type { VueStore } from './store'
 import { type App, inject, type InjectionKey } from 'vue'
+import { getActiveStore, type VueStore } from './store'
 
 export interface RstoreVueGlobal {
   store: VueStore
@@ -18,9 +18,9 @@ export function install(vueApp: App, options: PluginOptions) {
 }
 
 export function useStore(): RstoreVueGlobal['store'] {
-  const injected = inject(injectionKey, null)
+  const injected = inject(injectionKey, null)?.store ?? getActiveStore()
   if (!injected) {
-    throw new Error('Rstore is not installed. Make sure to install the plugin with `app.use(RstorePlugin, { store })`.')
+    throw new Error('Rstore is not installed. Make sure to install the plugin with `app.use(RstorePlugin, { store })`. For tests, use `setActiveStore(store)`.')
   }
-  return injected.store
+  return injected
 }

packages/vue/src/store.ts

@@ -176,3 +176,19 @@ declare module '@rstore/shared' {
     $time: Ref<number>
   }
 }
+
+let activeStore: VueStore | null = null
+
+/**
+ * Set the active store for testing modules or code outside of Vue components that need to access the store.
+ */
+export function setActiveStore(store: VueStore | null) {
+  activeStore = store
+}
+
+/**
+ * Get the active store. This is useful for testing modules or code outside of Vue components that need to access the store.
+ */
+export function getActiveStore(): VueStore | null {
+  return activeStore
+}