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Asked: 2026-06-01T11:03:01+00:00

I have some classes(call it Class A) which I would like to unit test

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I have some classes(call it Class A) which I would like to unit test but it uses some classes(call it Class B) with some static methods.

To remove reference to these classes with static methods I have to refactor them to be instance methods and inject into Class A.

Issue is Class A has lots of services(Not only class B) its seems to depend on?

What is the best option in this scenario? Have a constructor that has a lot of parameters that can take in these services?

Or is there something wrong with my design the fact that class A has so many dependencies?

Thanks

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1 Answer

  1. Editorial Team

    Issue is Class A has lots of services(Not only class B) its seems to depend on?

    Several dependencies are usually indicating a code smell. Your class is most likely breaking Single Responsibility Principle.

    Try to break down the class into smaller classes.

    Unit tests are a good quality indicator. Classes that are hard to test are often violating one or more of the SOLID principles.

    What is the best option in this scenario? Have a constructor that has
    a lot of parameters that can take in these services?

    Constructor injection is always the preferred way since it’s easy to tell what dependencies a class has.

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