directory cleanup for tests

test/media-api.test.js

@@ -1,4 +1,5 @@
 import { parseGpx } from '../src/services/gpx.js';
+import { SAMPLE_GPX } from '../test-support/gpx-fixtures.js';
 import assert from 'node:assert/strict';
 import fs from 'node:fs/promises';
 import os from 'node:os';
@@ -182,8 +183,9 @@ assert result['ok'] is True
     [pythonHealthCheck.stdout, pythonHealthCheck.stderr].filter(Boolean).join('\n')
   );
 
-  const gpxPath = path.join(root, 'examples', 'sample-route.gpx');
-  const gpx = await fs.readFile(gpxPath);
+  const gpxPath = path.join(runtime, 'test-route.gpx');
+  const gpx = Buffer.from(SAMPLE_GPX);
+  await fs.writeFile(gpxPath, gpx);
   const createRoute = await runProcess('python3', [
     path.join(root, 'tools/python/create_route.py'),
     '--base-url', LOCAL_API_URL,