From d33c434fe92259cb284f7f6cb59c3f875e7249f1 Mon Sep 17 00:00:00 2001
From: Loic Coenen <loic@visua.com>
Date: Wed, 24 Jun 2026 23:01:10 +0200
Subject: [PATCH] test: add e2e test for system time checkbox

---
 cypress/e2e/clock.cy.ts | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/cypress/e2e/clock.cy.ts b/cypress/e2e/clock.cy.ts
index 301fa55..a6d8eeb 100644
--- a/cypress/e2e/clock.cy.ts
+++ b/cypress/e2e/clock.cy.ts
@@ -209,4 +209,30 @@ describe("Berlin Clock", () => {
       assertFullClock("11:37:01", "ORROOROOOYYRYYRYOOOOYYOO");
     });
   });
+
+  describe("Use System Time", () => {
+    it("should show system time when checkbox is checked", () => {
+      // Start by entering a fixed time
+      cy.get('[data-testid="time-input"]').clear().type("12:00:00").type("{enter}");
+      cy.get('[data-testid="digital-clock"]').should("contain", "12:00:00");
+
+      // Check the "Use system time" checkbox
+      cy.get('[data-testid="use-system-time"]').check();
+
+      // Now the digital clock should reflect the real system time
+      cy.get('[data-testid="digital-clock"]').invoke("text").then((displayedTime) => {
+        // displayedTime is "HH:mm:ss"
+        const parts = displayedTime.split(":");
+        const displayedSeconds =
+          parseInt(parts[0]) * 3600 +
+          parseInt(parts[1]) * 60 +
+          parseInt(parts[2]);
+        const now = new Date();
+        const realSeconds =
+          now.getHours() * 3600 + now.getMinutes() * 60 + now.getSeconds();
+        // Allow a 5-second tolerance
+        expect(Math.abs(displayedSeconds - realSeconds)).to.be.lessThan(5);
+      });
+    });
+  });
 });