Add unit tests for viewport entity markers

tests/unit/viewport-entity-markers.test.ts

@@ -0,0 +1,27 @@
+import { BoxGeometry, CylinderGeometry, SphereGeometry, TorusGeometry } from "three";
+import { describe, expect, it } from "vitest";
+
+import { createSoundEmitterMarkerMeshes } from "../../src/viewport-three/viewport-entity-markers";
+
+describe("createSoundEmitterMarkerMeshes", () => {
+  it("builds a speaker-like marker instead of a sphere", () => {
+    const meshes = createSoundEmitterMarkerMeshes(0x72d7c9, false);
+
+    expect(meshes).toHaveLength(5);
+    expect(meshes[0].geometry).toBeInstanceOf(BoxGeometry);
+    expect(meshes[1].geometry).toBeInstanceOf(TorusGeometry);
+    expect(meshes[2].geometry).toBeInstanceOf(CylinderGeometry);
+    expect(meshes[3].geometry).toBeInstanceOf(TorusGeometry);
+    expect(meshes[4].geometry).toBeInstanceOf(CylinderGeometry);
+    expect(meshes.some((mesh) => mesh.geometry instanceof SphereGeometry)).toBe(false);
+
+    expect(meshes[0].position).toEqual({
+      x: 0,
+      y: 0,
+      z: 0
+    });
+    expect(meshes[1].position.y).toBeGreaterThan(meshes[3].position.y);
+    expect(meshes[1].position.z).toBeGreaterThan(0);
+    expect(meshes[3].position.z).toBeGreaterThan(0);
+  });
+});