Validate project device drop targets

tests/project-device-placement.service.test.ts

@@ -0,0 +1,38 @@
+import assert from "node:assert/strict";
+import { describe, it } from "node:test";
+import {
+  inferProjectDeviceSectionKey,
+  isProjectDevicePlacementValid,
+} from "../src/domain/services/project-device-placement.service.js";
+
+describe("project device placement", () => {
+  it("routes lighting categories to the lighting section before phase classification", () => {
+    assert.equal(
+      inferProjectDeviceSectionKey({ category: "Lighting", phaseType: "three_phase" }),
+      "lighting"
+    );
+    assert.equal(
+      inferProjectDeviceSectionKey({ category: "Beleuchtung", phaseType: "single_phase" }),
+      "lighting"
+    );
+  });
+
+  it("routes non-lighting devices by phase type", () => {
+    assert.equal(
+      inferProjectDeviceSectionKey({ category: "Socket", phaseType: "single_phase" }),
+      "single_phase"
+    );
+    assert.equal(
+      inferProjectDeviceSectionKey({ category: "Motor", phaseType: "three_phase" }),
+      "three_phase"
+    );
+  });
+
+  it("accepts only the inferred default section", () => {
+    const device = { category: "Motor", phaseType: "three_phase" as const };
+
+    assert.equal(isProjectDevicePlacementValid(device, { key: "three_phase" }), true);
+    assert.equal(isProjectDevicePlacementValid(device, { key: "single_phase" }), false);
+    assert.equal(isProjectDevicePlacementValid(device, { key: "unassigned" }), false);
+  });
+});