feat(dx): throw an error if store id is missing (#2167)

Co-authored-by: Eduardo San Martin Morote <posva@users.noreply.github.com>

Author: skirtles-code

packages/pinia/__tests__/store.spec.ts

@@ -379,4 +379,10 @@ describe('Store', () => {
       `[🍍]: A getter cannot have the same name as another state property. Rename one of them. Found with "anyName" in store "main".`
     ).toHaveBeenWarnedTimes(1)
   })
+
+  it('throws an error if no store id is provided', () => {
+    expect(() => defineStore({} as any)).toThrowError(
+      '[🍍]: defineStore must be passed an id string, either as its first argument or via the "id" option.'
+    )
+  })
 })

packages/pinia/src/store.ts

@@ -879,6 +879,12 @@ export function defineStore(
   } else {
     options = idOrOptions
     id = idOrOptions.id
+
+    if (__DEV__ && typeof id !== 'string') {
+      throw new Error(
+        `[🍍]: "defineStore()" must be passed a store id as its first argument.`
+      )
+    }
   }
 
   function useStore(pinia?: Pinia | null, hot?: StoreGeneric): StoreGeneric {