Persist circuit cell edits

tests/circuit-grid-model.test.ts

@@ -2,6 +2,8 @@ import assert from "node:assert/strict";
 import { describe, it } from "node:test";
 import {
   allColumns,
+  buildCircuitEditPatch,
+  buildDeviceRowEditPatch,
   getBlockSortValue,
   getCellKind,
   getCircuitValue,
@@ -85,4 +87,38 @@ describe("circuit grid model", () => {
     assert.equal(parseNumeric("quantity", ""), undefined);
     assert.throws(() => parseNumeric("quantity", "two"), /Ungültiger Zahlenwert/);
   });
+
+  it("builds nullable circuit command patches from grid drafts", () => {
+    assert.deepEqual(buildCircuitEditPatch("voltage", ""), {
+      voltage: null,
+    });
+    assert.deepEqual(
+      buildCircuitEditPatch("controlRequirement", " DALI "),
+      { controlRequirement: "DALI" }
+    );
+    assert.deepEqual(buildCircuitEditPatch("isReserve", "ja"), {
+      isReserve: true,
+    });
+  });
+
+  it("builds device command patches with explicit clearing semantics", () => {
+    assert.deepEqual(buildDeviceRowEditPatch("roomSummary", ""), {
+      roomNumberSnapshot: null,
+      roomNameSnapshot: null,
+    });
+    assert.deepEqual(
+      buildDeviceRowEditPatch("roomSummary", "1.01 Büro"),
+      {
+        roomNumberSnapshot: "1.01",
+        roomNameSnapshot: "Büro",
+      }
+    );
+    assert.deepEqual(buildDeviceRowEditPatch("technicalName", " Leuchte "), {
+      name: "Leuchte",
+    });
+    assert.throws(
+      () => buildDeviceRowEditPatch("quantity", ""),
+      /darf nicht leer sein/
+    );
+  });
 });