From b8abf1872562bae121a8f9f081bc1fe13bb2b0b5 Mon Sep 17 00:00:00 2001
From: Max <max@nextcloud.com>
Date: Mon, 13 Oct 2025 09:02:53 +0200
Subject: [PATCH] chore(test): add test for 4480

See #4480. (Fixed before)
---
 cypress/e2e/api/SyncServiceProvider.spec.js | 27 +++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/cypress/e2e/api/SyncServiceProvider.spec.js b/cypress/e2e/api/SyncServiceProvider.spec.js
index 8844754aab0..8d08568586e 100644
--- a/cypress/e2e/api/SyncServiceProvider.spec.js
+++ b/cypress/e2e/api/SyncServiceProvider.spec.js
@@ -34,8 +34,8 @@ describe('Sync service provider', function () {
 	})
 
 	afterEach(function () {
-		this.sourceProvider?.destroy()
-		this.targetProvider?.destroy()
+		cy.get('@sourceProvider').invoke('destroy')
+		cy.get('@targetProvider').invoke('destroy')
 	})
 
 	/**
@@ -162,4 +162,27 @@ describe('Sync service provider', function () {
 		// 2 clients sync fast first and then every 5 seconds -> 2*12 = 24. Actual 32.
 		cy.get('@sync.all').its('length').should('be.lessThan', 60)
 	})
+
+	it('syncs even when initial state was present', function() {
+		const sourceMap = this.source.getMap()
+		const targetMap = this.target.getMap()
+		sourceMap.set('unrelated', 'value')
+		cy.intercept({ method: 'POST', url: '**/apps/text/session/*/push' })
+			.as('push')
+		cy.intercept({ method: 'POST', url: '**/apps/text/session/*/sync' })
+			.as('sync')
+		cy.wait('@push')
+		cy.then(() => {
+			sourceMap.set('keyA', 'valueA')
+			expect(targetMap.get('keyB')).to.be.eq(undefined)
+		})
+		cy.wait('@sync')
+		cy.wait('@sync')
+		// eslint-disable-next-line cypress/no-unnecessary-waiting
+		cy.wait(1000)
+		cy.then(() => {
+			expect(targetMap.get('keyA')).to.be.eq('valueA')
+		})
+	})
+
 })