1. Private method test

We can use PrivateAccessor class Example. Where GetNumberOfPeople is private method

        //Arrange
        IManual manual = new Mock<IManual>().Object;
        Order order = new Order { NumberOfPeople = 100, NumberOfPeopleNotInterest = 50 };
        var target = new PrivateAccessor(new JuiceBuilder(manual)); //<---

        //Act
        var original = target.CallMethod("GetNumberOfPeople", order); //<---

        // var private_property = target.GetProperty("_property_name"); //<-- for private property
        // Assert.Equal("private property value", private_property.ToString());

        // var responsesData = (ValueTuple<string, string, string>)target.CallMethod("MethodThatReturnTuple"); //<-- If function return value Tuple
        // Assert.Equal("value for first item", responsesData.Item1);
        // Assert.Equal("value for second item", responsesData.Item2);


        //Assert
        Assert.AreEqual(original, 50);