From a3c1ce8519e83182a38e94278c7152978c96a709 Mon Sep 17 00:00:00 2001
From: Evan Mattson <emattson@google.com>
Date: Thu, 31 Oct 2024 11:44:52 -0400
Subject: [PATCH] Update accountSummaries fetch reducer to handle none
 returned.

---
 .../js/modules/analytics-4/datastore/accounts.js  | 11 ++++-------
 .../analytics-4/datastore/accounts.test.js        | 15 +++++++++++++++
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/assets/js/modules/analytics-4/datastore/accounts.js b/assets/js/modules/analytics-4/datastore/accounts.js
index 26b72437391..473dd06b076 100644
--- a/assets/js/modules/analytics-4/datastore/accounts.js
+++ b/assets/js/modules/analytics-4/datastore/accounts.js
@@ -69,15 +69,12 @@ const fetchGetAccountSummariesStore = createFetchStore( {
 		return { pageToken };
 	},
 	reducerCallback( state, response ) {
-		const { accountSummaries: newAccountSummaries } = response;
-		const mergedAccountSummaries = [
-			...( state.accountSummaries || [] ),
-			...newAccountSummaries,
-		];
-
 		return {
 			...state,
-			accountSummaries: mergedAccountSummaries,
+			accountSummaries: [
+				...( state.accountSummaries || [] ),
+				...( response.accountSummaries || [] ),
+			],
 		};
 	},
 } );
diff --git a/assets/js/modules/analytics-4/datastore/accounts.test.js b/assets/js/modules/analytics-4/datastore/accounts.test.js
index fcb23f5ab0a..7dfbab7e239 100644
--- a/assets/js/modules/analytics-4/datastore/accounts.test.js
+++ b/assets/js/modules/analytics-4/datastore/accounts.test.js
@@ -244,6 +244,21 @@ describe( 'modules/analytics-4 accounts', () => {
 			} );
 		} );
 
+		describe( 'fetchGetAccountSummaries', () => {
+			it( 'supports when no account summaries returned', async () => {
+				fetchMock.get( accountSummariesEndpoint, {
+					body: { nextPageToken: null },
+					status: 200,
+				} );
+				const { fetchGetAccountSummaries } =
+					registry.dispatch( MODULES_ANALYTICS_4 );
+
+				await fetchGetAccountSummaries();
+
+				expect( store.getState().accountSummaries ).toEqual( [] );
+			} );
+		} );
+
 		describe( 'transformAndSortAccountSummaries', () => {
 			it( 'should create an action to transform and sort account summaries', async () => {
 				registry