Show progress on upload and resolve.

sdk/lib/_internal/pub/test/oauth2/with_a_server_rejected_refresh_token_authenticates_again_test.dart

Index: sdk/lib/_internal/pub/test/oauth2/with_a_server_rejected_refresh_token_authenticates_again_test.dart
diff --git a/sdk/lib/_internal/pub/test/oauth2/with_a_server_rejected_refresh_token_authenticates_again_test.dart b/sdk/lib/_internal/pub/test/oauth2/with_a_server_rejected_refresh_token_authenticates_again_test.dart
index 154388b29b74713b8e77c3d877592c180398f6fc..1a103e98bcc22faa8ae5b8f57ea89dfa4bd04951 100644
--- a/sdk/lib/_internal/pub/test/oauth2/with_a_server_rejected_refresh_token_authenticates_again_test.dart
+++ b/sdk/lib/_internal/pub/test/oauth2/with_a_server_rejected_refresh_token_authenticates_again_test.dart
@@ -28,6 +28,7 @@ main() {
         .create();
 
     var pub = startPublish(server);
+
     confirmPublish(pub);
 
     server.handle('POST', '/token', (request) {
@@ -41,6 +42,7 @@ main() {
       });
     });
 
+    expect(pub.nextLine(), completion(matches(r'Uploading\.\.\.+')));
     authorizePub(pub, server, 'new access token');
 
     server.handle('GET', '/packages/versions/new.json', (request) {