commit 7630f1920e0fac7df97082e17d732b99569981a2
author srawlins <srawlins@google.com> Mon Jul 20 09:38:16 2020 -0400
committer Sam Rawlins <sam.rawlins@gmail.com> Mon Jul 27 13:10:45 2020 -0700
tree 22b556dd089368be07629c252330af2cbe153c63
parent ea7bdba28a7226312e6975bae50ea96b8a2c0435

Improve error when non-mock method is called in when().

We've seen many users confused about mocking extension methods. There is an FAQ entry, but improving the error message is important as well.

PiperOrigin-RevId: 322132516

lib/src/mock.dart

diff --git a/lib/src/mock.dart b/lib/src/mock.dart
index 793f8f6..fe7d47c 100644
--- a/lib/src/mock.dart
+++ b/lib/src/mock.dart
@@ -439,8 +439,8 @@
   void _completeWhen(Answering<T> answer) {
     if (_whenCall == null) {
       throw StateError(
-          'Mock method was not called within `when()`. Was a real method '
-          'called?');
+          'No method stub was called from within `when()`. Was a real method '
+          'called, or perhaps an extension method?');
     }
     _whenCall._setExpected<T>(answer);
     _whenCall = null;