Refactor ground probing logic in first-person navigation controller tests

tests/unit/first-person-navigation-controller.test.ts

@@ -51,13 +51,12 @@ function createRuntimeControllerContext(
       feetPosition: Vec3,
       shape: FirstPersonPlayerShape
     ) => boolean;
-            options.probePlayerGround?.(feetPosition, shape, maxDistance) ?? 
-            {
-              grounded: true,
-              distance: 0,
-              normal: { x: 0, y: 1, z: 0 },
-              slopeDegrees: 0
-            },
+  } = {}
+) {
+  const runtimeScene = buildRuntimeSceneFromDocument(
+    {
+      ...createEmptySceneDocument({ name: "Pointer Lock Scene" }),
+      entities: {
         [playerStart.id]: playerStart
       }
     },
@@ -327,23 +326,11 @@ describe("FirstPersonNavigationController", () => {
               maxDistance: number
             ) => PlayerGroundProbeResult
           >()
-          .mockReturnValueOnce({
-            grounded: true,
-            distance: 0,
-            normal: { x: 0, y: 1, z: 0 },
-            slopeDegrees: 0
-          })
-          .mockReturnValueOnce({
-            grounded: true,
-            distance: 0,
-            normal: { x: 0, y: 1, z: 0 },
-            slopeDegrees: 0
-          })
           .mockReturnValue({
-            grounded: false,
-            distance: null,
-            normal: null,
-            slopeDegrees: null
+            grounded: true,
+            distance: 0,
+            normal: { x: 0, y: 1, z: 0 },
+            slopeDegrees: 0
           })
       }
     );