How can we run a test method with multiple parameters in MSTest

Question

NUnit has a feature called Values  like below   Test  public void MyTest       Values 1 2 3   int x       Values  quot A quot   quot B quot    string s                  This means that the test method will run six times  MyTest 1   quot A quot   MyTest 1   quot B quot   MyTest 2   quot A quot   MyTest 2   quot B quot   MyTest 3   quot A quot   MyTest 3   quot B quot    We re using MSTest now  but is there any equivalent for this so that I can run the same test with multiple parameters   TestMethod  public void Mytest

User · Answer

MSTest does not support that feature  but you can implement your own attribute to achieve that  Have a look at Enabling parameterized tests in MSTest using PostSharp

User · Answer

There is  of course  another way to do this which has not been discussed in this thread  i e  by way of inheritance of the class containing the TestMethod  In the following example  only one TestMethod has been defined but two test cases have been made    In Visual Studio 2012  it creates two tests in the TestExplorer    DemoTest B10 A5 test DemoTest A12 B4 test  public class Demo       int a  b       public Demo int  a  int  b                this a    a          this b    b             public int Sum                 return this a   this b           public abstract class DemoTestBase       Demo objUnderTest      int expectedSum       public DemoTestBase int  a  int  b  int  expectedSum                objUnderTest   new Demo  a   b           this expectedSum    expectedSum              TestMethod      public void test                 Assert AreEqual this expectedSum  this objUnderTest Sum               TestClass  public class DemoTest A12 B4   DemoTestBase       public DemoTest A12 B4     base 12  4  16         public abstract class DemoTest B10 Base   DemoTestBase       public DemoTest B10 Base int  a    base  a  10   a   10          TestClass  public class DemoTest B10 A5   DemoTest B10 Base       public DemoTest B10 A5     base 5

User · Answer

It is unfortunately not supported in older versions of MSTest  Apparently there is an extensibility model and you can implement it yourself  Another option would be to use data-driven tests  My personal opinion would be to just stick with NUnit though    As of Visual Studio 2012  update 1  MSTest has a similar feature  See  McAden s answer

User · Answer

EDIT 4  Looks like this is completed in MSTest V2 June 17  2016  https   blogs msdn microsoft com visualstudioalm 2016 06 17 taking-the-mstest-framework-forward-with-mstest-v2   Original Answer   As of about a week ago in Visual Studio 2012 Update 1 something similar is now possible    DataTestMethod   DataRow 12 3 4    DataRow 12 2 6    DataRow 12 4 3   public void DivideTest int n  int d  int q      Assert AreEqual  q  n   d        EDIT  It appears this is only available within the unit testing project for WinRT Metro  Bummer  EDIT 2  The following is the metadata found using  Go To Definition  within Visual Studio    region Assembly Microsoft VisualStudio TestPlatform UnitTestFramework dll  v11 0 0 0    C  Program Files  x86  Microsoft SDKs Windows v8 0 ExtensionSDKs MSTestFramework 11 0 References CommonConfiguration neutral Microsoft VisualStudio TestPlatform UnitTestFramework dll  endregion  using System   namespace Microsoft VisualStudio TestPlatform UnitTestFramework        AttributeUsage AttributeTargets Method  AllowMultiple   false       public class DataTestMethodAttribute   TestMethodAttribute               public DataTestMethodAttribute             public override TestResult   Execute ITestMethod testMethod             EDIT 3  This issue was brought up in Visual Studio s UserVoice forums   Last Update states       STARTED       Visual Studio Team ADMIN Visual Studio Team  Product   Team  Microsoft Visual Studio  responded      April 25  2016 Thank you   for the feedback  We have started working on this       Pratap Lakshman Visual Studio   https   visualstudio uservoice com forums 330519-team-services suggestions 3865310-allow-use-of-datatestmethod-datarow-in-all-unit

User · Answer

MSTest has a powerful attribute called DataSource  Using this you can perform data-driven tests as you asked  You can have your test data in XML  CSV  or in a database  Here are few links that will guide you  Unit Testing with VSTS 2008  Part 3  How To  Create a Data-Driven Unit Test Walkthrough  Using a Configuration File to Define a Data Source

User · Answer

This feature is in pre-release now and works with Visual  Studio  2015  For example   TestClass  public class UnitTest1        TestMethod       DataRow 1  2  2        DataRow 2  3  5        DataRow 3  5  8       public void AdditionTest int a  int b  int result                Assert AreEqual result  a   b

User · Answer

Not exactly the same as NUnit s Value  or TestCase  attributes  but MSTest has the DataSource attribute  which allows you to do a similar thing  You can hook it up to database or XML file - it is not as straightforward as NUnit s feature  but it does the job

User · Answer

It s very simple to implement - you should use TestContext property and TestPropertyAttribute  Example public TestContext TestContext   get  set    private List lt string gt  GetProperties         return TestContext Properties          Cast lt KeyValuePair lt string  object gt  gt             Where     gt    Key StartsWith  quot par quot             Select     gt    Value as string           ToList         usage  TestMethod   TestProperty  quot par1 quot    quot http   getbootstrap com components  quot     TestProperty  quot par2 quot    quot http   www wsj com europe quot    public void SomeTest         var pars   GetProperties                 EDIT  I prepared few extension methods to simplify access to the TestContext property and act like we have several test cases  See example with processing simple test properties here   TestMethod   TestProperty  quot fileName1 quot     quot   test file1 quot     TestProperty  quot fileName2 quot     quot   test file2 quot     TestProperty  quot fileName3 quot     quot   test file3 quot    public void TestMethod3         TestContext GetMany lt string gt   quot fileName quot   ForEach fileName   gt                  Arrange         var f   new FileInfo fileName              Act         var isExists   f Exists             Asssert         Assert IsFalse isExists              and example with creating complex test objects   TestMethod    Case 1  TestProperty nameof FileDescriptor FileVersionId    quot 673C9C2D-A29E-4ACC-90D4-67C52FBA84E4 quot          public void TestMethod2           Arrange     TestContext For lt FileDescriptor gt    Fill fi   gt  fi FileVersionId  Fill fi   gt  fi Extension  Fill fi   gt  fi Name  Fill fi   gt  fi CreatedOn  new CultureInfo  quot en-US quot   false   Fill fi   gt  fi AccessPolicy           ForEach fileInfo   gt                          Act             var fileInfoString   fileInfo ToString                   Assert             Assert AreEqual   quot Id   fileInfo FileVersionId   Ext   fileInfo Extension   Name   fileInfo Name   Created   fileInfo CreatedOn   AccessPolicy   fileInfo AccessPolicy   quot   fileInfoString                  Take a look to the extension methods and set of samples for more details

User · Answer

I couldn t get The DataRowAttribute to work in Visual Studio 2015  and this is what I ended up with   TestClass  public class Tests       private Foo  toTest        TestInitialize      public void Setup                 this  toTest   new Foo                TestMethod      public void ATest                 this Perform ATest 1  1  2           this Setup             this Perform ATest 100  200  300           this Setup             this Perform ATest 817001  212  817213           this Setup               private void Perform ATest int a  int b  int expected                   Obviously this would be way more complex             Assert IsTrue this  toTest Add a b     expected            public class Foo       public int Add int a  int b                return a   b           The real solution here is to just use NUnit  unless you re stuck in MSTest like I am in this particular instance

[c#] How can we run a test method with multiple parameters in MSTest?

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