Question

I have a private method which is being called in a method I am testing.I want to verify the correct parameters are being passed to this private method. I have written the following setup in Moq which will test what I want, however it doesn’t really allow me to follow the Arrange, Act, Assert pattern.

Is there any way I can perform a similar test where by the assert can appear with all of my other asserts? At the moment the code below lives within the Arrange.

     myClass.Setup(
                x =>
                x.myMethod(
                    It.IsAny<Person>>(),
                    It.IsAny<string>(),
                    It.IsAny<Person>(),
                    It.IsAny<ICollection<string>>(),
                    It.IsAny<ICollection<string>>(),
                    It.IsAny<bool>())).Callback
                <Person, string, Person, Person, ICollection<string>, bool>(
                    (a, b, c, d, e, f) =>
                        { 
                            Assert.AreEqual("NameA", a.Name); 
                            Assert.AreEqual("StringB", b);
                            Assert.AreEqual("NameC", c.Name);
                            Assert.AreEqual(2, d);

                            var dList = d.ToList().OrderBy(x => x.Name);
                            Assert.AreEqual("PersonA", dList[0].Name)
                            Assert.AreEqual("PersonB", dList[1].Name);
                        });

I should say, I am aware that you can perfom a verify to check whether a method has been called with certain inputs, however I am not aware of any way of matching the ICollection params.

Answer 1

If you are using those assertions to check the parameters, you can do it in your setup. If your mock uses strict behavior, it will fail if a parameter doesn’t match the predicate.

 // declare your mock with strict behavior

 myClass.Setup(
     x =>
     x.myMethod(
         It.Is<Person>(person => person.Name == "NameA"),
         "Stringb",
         It.Is<Person>(person => person.Name == "NameC"),,
         It.Is<ICollection<string>>(coll =>{ 
                //your other validations
            }),
         It.IsAny<ICollection<string>>(),
         It.IsAny<bool>()));