c# - unit testing a class with event and delegate -

i new testing please help.

i have following class

public delegate void oninvalidentrymethod(itnentry entry, string message);  public class entryvalidator {     public event oninvalidentrymethod oninvalidentry;      public bool isvalidentry(itnentry entry, string ticker)     {         if (!isfieldvalid(entry, ticker.trim().length.tostring(), "0"))             return false;          return true;     }      private bool isfieldvalid(itnentry entry, string actual, string invalidvalue)     {         if (actual == invalidvalue)         {             raiseinvalidentryevent(entry);             return false;         }          return true;     }      private void raiseinvalidentryevent(itnentry entry)     {         if (oninvalidentry != null)             oninvalidentry(entry, "invalid entry in list: " + entry.list.name + ".");     } } 

i have written test case far struggling event , delegate shown below

[testfixture] public class entryvalidatortests {     private entryvalidator _entryvalidator;      private faketnentry _selectedentry;     private string _ticker;      [setup]     public void setup()     {         _entryvalidator = new entryvalidator();         _ticker = "bol";     }      private faketnentry makeentry(string ticker)     {         return new faketnentry { ticker = ticker};     }      [test]     public void isvalidentry_withvalidvalues()     {         _selectedentry = makeentry(_ticker);          assert.istrue(_entryvalidator.isvalidentry(_selectedentry, _selectedentry.ticker));     }      [test]     public void isvalidentry_withinvalidticker()     {         _selectedentry = makeentry("");         assert.isfalse(_entryvalidator.isvalidentry(_selectedentry, _selectedentry.ticker));     } }} 

please can help? thanks..

it's simplest subscribe event using anonymous method:

[test] public void isvalidentry_withvalidvalues() {     _selectedentry = makeentry(_ticker);     _entryvalidator.oninvalidentry += delegate {          assert.fail("shouldn't called");     };      assert.istrue(_entryvalidator.isvalidentry(_selectedentry, _selectedentry.ticker)); }      [test] public void isvalidentry_withinvalidticker() {     bool eventraised = false;     _selectedentry = makeentry("");     _entryvalidator.oninvalidentry += delegate { eventraised = true; };      assert.isfalse(_entryvalidator.isvalidentry(_selectedentry, _selectedentry.ticker));     assert.istrue(eventraised); } 

in second test might want validate event arguments expected too.

also note "invalid" 1 word - test should isvalidentry_withinvalidticker. i'd not bother setup - i'd declare new local variables in each test.