Prevent stale cell update overwrites

tests/circuit-write.rules.test.ts

@@ -44,7 +44,7 @@ describe("circuit write service rules", () => {
         async existsByEquipmentIdentifier() {
           return false;
         },
-        async update(_id: string, payload: Record<string, unknown>) {
+        async updateFields(_id: string, payload: Record<string, unknown>) {
           updatePayload = payload;
         },
       } as never,
@@ -52,8 +52,10 @@ describe("circuit write service rules", () => {
 
     await service.updateCircuit("c1", { voltage: 400, controlRequirement: "DALI" });
 
-    assert.equal(updatePayload.voltage, 400);
-    assert.equal(updatePayload.controlRequirement, "DALI");
+    assert.deepEqual(updatePayload, {
+      voltage: 400,
+      controlRequirement: "DALI",
+    });
   });
 
   it("rejects duplicate equipment identifiers in same circuit list", async () => {
@@ -1147,7 +1149,7 @@ describe("circuit write service rules", () => {
   });
 
   it("tracks local edits on linked device rows as overridden fields", async () => {
-    let savedOverrides: string | undefined;
+    let updatePayload: Record<string, unknown> = {};
     const current = {
       id: "r1",
       circuitId: "c1",
@@ -1165,14 +1167,17 @@ describe("circuit write service rules", () => {
         async findById() {
           return current as never;
         },
-        async update(_rowId: string, input: { overriddenFields?: string }) {
-          savedOverrides = input.overriddenFields;
+        async updateFields(_rowId: string, input: Record<string, unknown>) {
+          updatePayload = input;
         },
       } as never,
     });
 
     await service.updateDeviceRow("r1", { quantity: 2 });
 
-    assert.deepEqual(JSON.parse(savedOverrides ?? "[]"), ["quantity"]);
+    assert.deepEqual(updatePayload, {
+      quantity: 2,
+      overriddenFields: "[\"quantity\"]",
+    });
   });
 });