NUnit, is it possible to continue executing test after Assert fails?

Question

In a test that contains some asserts, for example:

Assert.AreEqual(1,1);
Assert.AreEqual(2,1);
Assert.AreEqual(2,2);

is it possible to let

Answer 1

Nope. You shouldn't really have more than one assert per test anyway, that reduces the seperation and makes it more difficult to find out which one failed.

If you have a lot of code that needs executing before the Assert, seperate it out into a [SetUp] function, or make it a seperate procedure.

Answer 2

No you can't do it with NUnit alone. You have to do something like @Konstantin Spirin said. I created a small extension that you can use; it's called NUnit-GroupAssert. It can be found here: https://github.com/slvnperron/NUnit-GroupAssert

How to use it:

[Test]
public void Verify_GroupsExceptions()
{
    var group = new AssertGroup();
    group.Add(() => Assert.AreEqual(10, 20));
    group.Add(() => Assert.AreEqual(1, 1));
    group.Add(() => Assert.AreEqual(3, 4));
    group.Add(() => Assert.IsTrue(1 > 3));
    group.Verify();
}

// OR

public void Verify_GroupsExceptions()
{
    // Verifies on disposal
    using (var group = new AssertGroup())
    {
        group.Add(() => Assert.AreEqual(10, 20));
        group.Add(() => Assert.AreEqual(1, 1));
        group.Add(() => Assert.AreEqual(3, 4));
        group.Add(() => Assert.IsTrue(1 > 3));
    }
}

it will output:

Test failed because one or more assertions failed:
1) Expected: 10
But was: 20
From Verify_GroupsExceptions at line 18

2) Expected: 3
But was: 4
From Verify_GroupsExceptions at line 20

3) Expected: True
But was: False
From Verify_GroupsExceptions at line 21

Answer 3

I rewrote Konstantin Spirin's code sample into VB.

Imports NUnit.Framework
Imports System.Reflection

Public Class Group_LIB_NUnit_Assert_Multiple

    Public Shared Sub Multiple(ParamArray Assertions As Action())
        Dim ExceptionObj As Exception
        Dim Exceptions As New List(Of Exception)
        Dim Message As String

        For Each Assertion In Assertions
            Try
                Assertion()
            Catch ex As Exception
                Exceptions.Add(ex)
            End Try
        Next

        If Exceptions.Count > 0 Then
            Message = String.Format("{0}{1} assertions failed: {2}{3}", Environment.NewLine, Exceptions.Count, Environment.NewLine, String.Join(Environment.NewLine, Exceptions.Select(Function(e) e.Message).ToList()))

            ExceptionObj = New AssertionException(Message)

            StackTraceReplace(ExceptionObj, Exceptions.First.StackTrace)

            Throw ExceptionObj
        End If
    End Sub

    Public Shared Sub StackTraceReplace(ExceptionObj As Exception, StackTrace As String)
        Dim RemoteStackTraceString As FieldInfo

        RemoteStackTraceString = GetType(Exception).GetField("_remoteStackTraceString", Reflection.BindingFlags.Instance Or Reflection.BindingFlags.NonPublic)

        RemoteStackTraceString.SetValue(ExceptionObj, StackTrace)

    End Sub
End Class

Imports Group.Library4
Imports NUnit.Framework

<TestFixture()> _
Public Class TEST_Group_LIB_NUnit_Assert_Multiple

    <Test()> _
    <TestCaseSource("Factory")> _
    Public Sub Multiple(TestObj As TEST_DATA_Group_LIB_NUnit_Assert_Multiple)

        Group_LIB_NUnit_Assert_Multiple.Multiple(Sub() Assert.That(TestObj.Gender, [Is].EqualTo("F"c), "Gender"), Sub() Assert.That(TestObj.Name, [Is].EqualTo("George Washington"), "Name"))
    End Sub

    Public Function Factory() As List(Of TEST_DATA_Group_LIB_NUnit_Assert_Multiple)
        Dim L As New List(Of TEST_DATA_Group_LIB_NUnit_Assert_Multiple)
        Dim TestObj As TEST_DATA_Group_LIB_NUnit_Assert_Multiple

        TestObj = New TEST_DATA_Group_LIB_NUnit_Assert_Multiple()
        TestObj.DOB = New DateTime(2015, 8, 12)
        TestObj.Gender = "M"c
        TestObj.Name = "Abraham Lincoln"
        L.Add(TestObj)

        TestObj = New TEST_DATA_Group_LIB_NUnit_Assert_Multiple()
        TestObj.DOB = New DateTime(2015, 8, 12)
        TestObj.Gender = "F"c
        TestObj.Name = "George Washington"
        L.Add(TestObj)

        TestObj = New TEST_DATA_Group_LIB_NUnit_Assert_Multiple()
        TestObj.DOB = New DateTime(2015, 8, 12)
        TestObj.Gender = "A"c
        TestObj.Name = "John Hancock"
        L.Add(TestObj)

        Return L
    End Function
End Class

Public Class TEST_DATA_Group_LIB_NUnit_Assert_Multiple

    Public Property DOB As Date

    Public Property Gender As Char

    Public Property Name As String

End Class