SUT factory may be a fancy name to what is basically a utility method, used to create an instance of the system under test. The main point of a SUT Factory is to reduce code duplication and improve maintainability of your unit tests suite.
I’ll show you a quick example of how can you implement this type of utility method.
Imagine a test like this one:
[TestMethod]
public void TestUsingConstructor()
{
//Arrange
MySUT sut = new MySUT();
//Act
//...Exercise the sut
//Assert
//...Verifying the results
}
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