Demo Project (NUnit Setup)

Steps--> 

1.Create a new project in console application.

2.Write the production code in a separate class file.I have written a regular calculator that can do addition, substraction, multiplication, division operation.

3.Add a new class library for test purpose.

4.Add a  reference to our production code from our test project.

5.Install NUnit3Test Adapter

Tools->Extensions and Updates->Online->NUnit3 Test Adpter

6.Install NUnit

Reference->Manage Nuget Packages->Online->Nunit

Now we can use NUnit’s attributes and NUnit asserts.

7.Under class library file write the test code using NUnit attributes.

 [TestFixture]

    public class RegularCalcultorTests

    {

        RegularCalculator calculator;

        [SetUp]

        public void BeforeEachTest()

        {

            calculator = new RegularCalculator();

        }

        [Test]

        public void TestAddition()

        {

           var result=calculator.Addition(10, 20);

            Assert.That(result, Is.EqualTo(30));

        }

        [Test]

        public void TestSubtraction()

        {

            calculator = new RegularCalculator();

            var result = calculator.Subtraction(50, 20);

            Assert.That(result, Is.EqualTo(30));

        }

        [Test]

        public void TestMultiplication()

        {

            calculator = new RegularCalculator();

            var result = calculator.Multiplication(10, 20);

            Assert.That(result, Is.EqualTo(200));

        }

        [Test]

        public void TestDivision()

        {

           calculator = new RegularCalculator();

            var result = calculator.Division(40, 20);

            Assert.That(result, Is.EqualTo(2));

        }


        [TearDown]

        public void AfterEachTest()

        {

            calculator = null;

        }

8.After build the code we can see the tests in test explorer and can run from it.