Arractas is designed to decouple the context from your tests, and encourage the Arrange-Act-Assert syntax

Example:
public class Customer_Named_John : BaseContextTest<OneCustomerNamedJohnContext> {
    [Test]
    public void ShouldBePreferred() {
      Assert.IsTrue(Context.Customer.IsPreferred);
    }
}

public class Customer_WhenSetNameToJohn : BaseCommandTest<OneCustomerContext> {
    public override Act() {
      Context.Customer.Name = "John";
    }
    [Test]
    public void ShouldBecomePreferred() {
      Assert.IsTrue(Context.Customer.IsPreferred);
    }
}