Dean

Results 5 issues of Dean

https://github.com/deanagan/csharp-design-patterns/blob/4f798a4154bc9dfa1a6da68db42bed756128de33/strategy_pattern/strategy_pattern_test/strategy_test.cs#L1

A real world example for observer pattern may be better

Rewrite test for observer pattern.

The tests on the builder pattern should be more on the strategy builder. It seems to be testing the strategy computation.