public void ShouldCReturnTheSameInstance()
{
var instance1 = BasicSingleton.GetInstance();
var instance2 = BasicSingleton.GetInstance();
instance1.Should().BeSameAs(instance2);
}
public void ShouldCreateInstance()
{
var instance = BasicSingleton.GetInstance();
instance.Should().NotBeNull();
instance.Should().BeOfType <BasicSingleton>();
}