Skip to main content

MSTEST - CollectionAssert

In orice proiect ar trebuii sa existe unit teste. In general, pentru validare, fiecare test poate sa contina Assert-uri de forma:
Assert.IsNotNull(result);
Assert.AreEqual(1,result.Count);
...
In cazul in care este nevoie sa validam o lista, folosim un foreach sau orice mod de a itera o lista:
foreach(var item in result.Items)
{
    Assert.IsTrue(baseResult.Contains(item));
}
.NET ne pune la dispoztie pe langa Assert si clasa CollectionAssert, prin intermediul careia putem sa validam o colectie. Mai jos o sa trec peste cateva metode care mi s-au parut mai importante:
  • CollectionAssert.AreNotNull - verifica ca toate elementele din colectie sa nu fie NULL
  • CollectionAssert.AllItemsAreInstancesOfType - verifica daca toate elementele din colectie sunt de un anumit tip( tipul poate sa fie si o interfata)
  • CollectionAssert.AllItemsAreUnique - verifica daca toate elementele din colectie sunt diferite( fiecare element din colectie se compara cu restul folosind metoda Equal). Optional se poate specifica un IComparer pentru a se face o comparatie custom.
  • CollectionAssert.AreEqual - Verifica daca doua colectii sunt egale( din nou metoda Equal este folosita)
  • CollectionAssert.AreEquivalent - Este asemanator cu AreEqual, dar elementele pot sa apara in orice ordine. De exemplu doua colectii o sa fie echivalente daca au acelasi numar de elemente si fiecare element din prima colectie este egal cu un element din a doua colectie.
  • CollectionAssert.Contains - verifica daca o colectie contine un anumit element
  • CollectionAssert.IsSubsetOf - verifica ca prima colectie este o submultime a celei de a doua colectie
Mai jos gasitit un exemplu care verifica ca doua colectii sunt egale:
HashSet<string> collectionOne = new HashSet<string>(){"A","B"};
HashSet<string> CollectionTwo = new HashSet<string>(){"B","A"};
CollectionAssert.AreEquivalent(collectionOne, collectionTwo);
Este bine de stiut ca fiecare din aceaste metode are si echivalentul pentru negatie. Pentru mai multe informatii puteti accesa: http://msdn.microsoft.com/en-us/library/microsoft.visualstudio.testtools.unittesting.collectionassert%28v=vs.100%29.aspx

Comments

  1. Ar fi frumos daca unit testing-ul nu ar mai fi 2nd hand citizen, si MS ar face niste upgrade-uri la el, gen support pentru lamba.
    Un candidat excepent ar fi chiar partea de collection assert unde uneori ai nevoie sa ai niste reguli de echivalenta "custom".

    ReplyDelete

Post a Comment

Popular posts from this blog

How to check in AngularJS if a service was register or not

There are cases when you need to check in a service or a controller was register in AngularJS.
For example a valid use case is when you have the same implementation running on multiple application. In this case, you may want to intercept the HTTP provider and add a custom step there. This step don’t needs to run on all the application, only in the one where the service exist and register.
A solution for this case would be to have a flag in the configuration that specify this. In the core you would have an IF that would check the value of this flag.
Another solution is to check if a specific service was register in AngularJS or not. If the service was register that you would execute your own logic.
To check if a service was register or not in AngularJS container you need to call the ‘has’ method of ‘inhector’. It will return TRUE if the service was register.
if ($injector.has('httpInterceptorService')) { $httpProvider.interceptors.push('httpInterceptorService&#…

ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded

Today blog post will be started with the following error when running DB tests on the CI machine:
threw exception: System.InvalidOperationException: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information. at System.Data.Entity.Infrastructure.DependencyResolution.ProviderServicesFactory.GetInstance(String providerTypeName, String providerInvariantName) This error happened only on the Continuous Integration machine. On the devs machines, everything has fine. The classic problem – on my machine it’s working. The CI has the following configuration:

TeamCity.NET 4.51EF 6.0.2VS2013
It seems that there …

Entity Framework (EF) TransactionScope vs Database.BeginTransaction

In today blog post we will talk a little about a new feature that is available on EF6+ related to Transactions.
Until now, when we had to use transaction we used ‘TransactionScope’. It works great and I would say that is something that is now in our blood.
using (var scope = new TransactionScope(TransactionScopeOption.Required)) { using (SqlConnection conn = new SqlConnection("...")) { conn.Open(); SqlCommand sqlCommand = new SqlCommand(); sqlCommand.Connection = conn; sqlCommand.CommandText = ... sqlCommand.ExecuteNonQuery(); ... } scope.Complete(); } Starting with EF6.0 we have a new way to work with transactions. The new approach is based on Database.BeginTransaction(), Database.Rollback(), Database.Commit(). Yes, no more TransactionScope.
In the followi…