fix nextjs unit test

Author: Lms24

packages/nextjs/test/performance/pagesRouterInstrumentation.test.ts

@@ -321,19 +321,25 @@ describe('pagesRouterInstrumentNavigation', () => {
 
       Router.events.emit('routeChangeStart', targetLocation);
 
-      expect(emit).toHaveBeenCalledTimes(1);
+      expect(emit).toHaveBeenCalledTimes(2);
+      const expectedStartSpanOptions = {
+        name: expectedTransactionName,
+        attributes: {
+          'sentry.op': 'navigation',
+          'sentry.origin': 'auto.navigation.nextjs.pages_router_instrumentation',
+          'sentry.source': expectedTransactionSource,
+        },
+      };
       expect(emit).toHaveBeenCalledWith(
-        'startNavigationSpan',
-        expect.objectContaining({
-          name: expectedTransactionName,
-          attributes: {
-            'sentry.op': 'navigation',
-            'sentry.origin': 'auto.navigation.nextjs.pages_router_instrumentation',
-            'sentry.source': expectedTransactionSource,
-          },
-        }),
-        { isRedirect: undefined },
+        'beforeStartNavigationSpan',
+        expect.objectContaining(expectedStartSpanOptions),
+        {
+          isRedirect: undefined,
+        },
       );
+      expect(emit).toHaveBeenCalledWith('startNavigationSpan', expect.objectContaining(expectedStartSpanOptions), {
+        isRedirect: undefined,
+      });
     },
   );
 });