Add tests for advanced rendering logic

tests/domain/advanced-rendering.test.ts

@@ -0,0 +1,30 @@
+import { describe, expect, it } from "vitest";
+
+import { createDefaultWorldSettings } from "../../src/document/world-settings";
+import { resolveBoxVolumeRenderPaths } from "../../src/rendering/advanced-rendering";
+
+describe("resolveBoxVolumeRenderPaths", () => {
+  it("uses authored fog and water paths when advanced rendering is enabled", () => {
+    const settings = createDefaultWorldSettings().advancedRendering;
+    settings.enabled = true;
+    settings.fogPath = "quality";
+    settings.waterPath = "performance";
+
+    expect(resolveBoxVolumeRenderPaths(settings)).toEqual({
+      fog: "quality",
+      water: "performance"
+    });
+  });
+
+  it("falls back to performance paths when advanced rendering is disabled", () => {
+    const settings = createDefaultWorldSettings().advancedRendering;
+    settings.enabled = false;
+    settings.fogPath = "quality";
+    settings.waterPath = "quality";
+
+    expect(resolveBoxVolumeRenderPaths(settings)).toEqual({
+      fog: "performance",
+      water: "performance"
+    });
+  });
+});