vibes

frontend/src/lib/url-state.test.ts

@@ -173,6 +173,30 @@ describe('url-state', () => {
     expect(state.overlays).toEqual(new Set(['noise', 'crime-hotspots']));
   });
 
+  it('round-trips satellite basemap selection', () => {
+    const params = stateToParams(
+      null,
+      {},
+      [],
+      new Set(),
+      'area',
+      undefined,
+      undefined,
+      undefined,
+      'satellite'
+    );
+
+    expect(params.get('basemap')).toBe('satellite');
+
+    window.history.replaceState({}, '', `/?${params.toString()}`);
+    const state = parseUrlState();
+
+    expect(state.basemap).toBe('satellite');
+
+    window.history.replaceState({}, '', '/?basemap=unknown');
+    expect(parseUrlState().basemap).toBe('standard');
+  });
+
   it('round-trips repeated school filters with dedicated URL params', () => {
     const schoolOne = createSchoolFilterKey('primary', 'good', 2, 1);
     const schoolTwo = createSchoolFilterKey('secondary', 'outstanding', 5, 2);