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 Code snippet for asserting throw in ArgumentException and its derived types(such as ArgumentNullException) in Nunit -  public void Test(){ Assert.Throws(Is.InstanceOf<ArgumentException>(), () =>{      //SUT code }); }

A sample example to set private variable to true from unit test class in C#.Net //TestService.cs public class TestService {         private bool _isInitialized = false; } //TestServiceUnitTest.cs using System.Reflection; public class TestServiceUnitTest {           private TestService _testService ;                    [TestInitalize]           private void testInitalize()          {             _testService = new TestService();          }                  [TestMethod]          Private void SetInitializeToTrue()          {                          FieldInfo field = typeof(TestService).GetField(" _isInitializ...

NON ASYNC Method Method.cs private MyMethod(object value1) {       if(value1 == null)       {            throw new ArgumentNullException(nameof(MyMethod));       } } Test.Cs [TestMethod] public void MyMethod_Throws_Verify() {          PrivateObject po = new PrivateObject(new Method()) TargetInvocationException exception = Assert.ThrowsException<TargetInvocationException>(() =>                     privateObject.Invoke("MyMethod", new object[] { null }));             Assert.AreEqual(typeof(ArgumentNullException), exception.InnerException.GetType());         }