recipes and tricks to develop integration test and unit test in c#

@javigm

@jecaestevez

List of points to see

Boring introduction
Testing Tips
Advanced Techniques of Testing
Conclusion

@javigm

@jecaestevez

Boring introduction

Manual Testing vs Automated Testing
Definition of Testing and Properties
Testing pyramid
Properties of good unit testing
Good practices of unit testing

@javigm

@jecaestevez

Manual Testing

Boring introduction

Take long time during the long term
Require complex configuration
Limit visibility, difficult to do Regression Tests
Flexible

Automated Testing

Executed by tools and computer, it’s significantly faster than manual.
Regression Testing easy with automation tools.
Find more bugs than a human tester
Better visibility into app performance

@javigm

Definition of testing and properties

Boring introduction

@javigm

Definition
Properties:
- Reduce bugs
- Decrease the cost of fix errors
- High quality of code
- Code Coverage
- Allow safe refactors.

“I don’t need to test this.”

Testing Pyramid

Boring introduction

bit.ly/automateRegressionTestPlan

Altered

@jecaestevez

Properties of Unit testing

Boring introduction

@javigm

Automated and Repeatable.
Easy to implement and run quickly.
Fully isolated (runs independently of the other tests)
Readable and in case of fail must be describable and understandable
AAA (Arrange / Act / Assert)

when I have to test my own code

Good practices of Unit Testing

Boring introduction

@javigm

Importance to write good unit tests
Choose good testing framework (Nunit or Xunit)
Ignore Test we are not secure (not adding comments)
One Assert Per Test Method (Assert with message)
Limit Use of Mocks
Don't Mock Entity Framework completely
Clean Code (SOLID, design patterns, DRY)

Testing from "top" layers
Generating assets
Smart Asserts
Testing artefacts

Testing Tips

@jecaestevez

Testing from "top" layers

Testing Tips

@jecaestevez

[Authorize]
public class LocationController : ApiController
{

    // PUT api/location/5
    public LocationBase Put(int id, [FromBody]LocationBase value)
    {
    }
}

    [TestClass]
    public class LocationControllerTest
    {
        LocationController locController;

        [TestInitialize]
        public void Setup()
        {
            locController = new LocationController();
        }














    }

    [TestClass]
    public class LocationControllerTest
    {
        LocationController locController;

        [TestInitialize]
        public void Setup()
        {
            locController = new LocationController();
        }

        [TestMethod]
        public void PutNewLocation_v1()
        {
            LocationBase newLocation = new LocationBase()
            { Id = 0, DisplayName = "Los Motriles", Name = "Motril", Latitude = 36, Longitude = -3 };

            var locationSaved = locController.Put(0, newLocation);

            Assert.IsTrue(locationSaved.Id > 0);
            Assert.AreEqual(locationSaved.DisplayName, newLocation.DisplayName);
            Assert.AreEqual(locationSaved.Name, newLocation.Name);
            Assert.AreEqual(locationSaved.Latitude, newLocation.Latitude);
            Assert.AreEqual(locationSaved.Longitude, newLocation.Longitude);
        }
    }

Generating static assets

Testing Tips

@jecaestevez

[Authorize]
public class LocationController : ApiController
{

    // PUT api/location/5
    public LocationBase Put(int id, [FromBody]LocationBase value)
    {
    }
}

    [TestClass]
    public class LocationControllerTest
    {
        ........

        [TestMethod]
        public void PutNewLocation_v1()
        {
            LocationBase newLocation = new LocationBase()
            { Id = 0, DisplayName = "Los Motriles", Name = "Motril", Latitude = 36, Longitude = -3 };

            var locationSaved = locController.Put(0, newLocation);

            Assert.IsTrue(locationSaved.Id > 0);
            Assert.AreEqual(locationSaved.DisplayName, newLocation.DisplayName);
            Assert.AreEqual(locationSaved.Name, newLocation.Name);
            Assert.AreEqual(locationSaved.Latitude, newLocation.Latitude);
            Assert.AreEqual(locationSaved.Longitude, newLocation.Longitude);
        }
    }

    [TestClass]
    public class LocationControllerTest
    {
        ........

        [TestMethod]
        public void PutNewLocation_GeneratingAssets()
        {
            //First generate the json asset for example 
            //  new JavaScriptSerializer().Serialize(newLocation);

            var locJson = TestUtil.ReadJsonFile("Motril_Location.json", "..\\Assets");
            LocationBase newLocation = JsonConvert.DeserializeObject<LocationBase>(locJson);

            var locationSaved = locController.Put(0, newLocation);

            Assert.IsTrue(locationSaved.Id > 0);
            Assert.AreEqual(locationSaved.DisplayName, newLocation.DisplayName);
            Assert.AreEqual(locationSaved.Name, newLocation.Name);
            Assert.AreEqual(locationSaved.Latitude, newLocation.Latitude);
            Assert.AreEqual(locationSaved.Longitude, newLocation.Longitude);

        }
    }

Smart asserts

Testing Tips

@jecaestevez

    [TestClass]
    public class LocationControllerTest
    {
        ........

        [TestMethod]
        public void PutNewLocation_GeneratingAssets()
        {
            //First generate the json asset for example 
            //  new JavaScriptSerializer().Serialize(newLocation);

            var locJson = TestUtil.ReadJsonFile("Motril_Location.json", "..\\Assets");
            LocationBase newLocation = JsonConvert.DeserializeObject<LocationBase>(locJson);

            var locationSaved = locController.Put(0, newLocation);

            Assert.IsTrue(locationSaved.Id > 0);
            Assert.AreEqual(locationSaved.DisplayName, newLocation.DisplayName);
            Assert.AreEqual(locationSaved.Name, newLocation.Name);
            Assert.AreEqual(locationSaved.Latitude, newLocation.Latitude);
            Assert.AreEqual(locationSaved.Longitude, newLocation.Longitude);

        }
    }

    [TestClass]
    public class LocationControllerTest
    {
        ........

        [TestMethod]
        public void PutNewLocation_SmartAsserts()
        {
            
            LocationBase newLocation = ArrageLocation("Motril_Location.json", "..\\Assets");
            LocationBase resultLocation = ArrageLocation("Motril_GeoLocated.json", "..\\Assets");

            var locationSaved = locController.Put(0, newLocation);

            Assert.AreEqual(locationSaved, resultLocation);

        }

        private LocationBase ArrageLocation(string fileName,string path)
        {
            var locJson = TestUtil.ReadJsonFile(fileName, path);
            return JsonConvert.DeserializeObject<LocationBase>(locJson);
        }
    }