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

NUnit 3.6 adds Assert.Multiple method and MultipleAsserts attribute.

See https://docs.nunit.org/articles/nunit/writing-tests/assertions/multiple-asserts.html

I prefer to be practical and put several related assertions in one method.

I have a helper class which enables the following syntax (I use):

AssertAll.Succeed(
    () => Assert.AreEqual("bb", id.Context),
    () => Assert.AreEqual("abc", id.FullName),
    () => Assert.AreEqual("b", id.SessionID));

which gives me error messages like this:

Assert.AreEqual failed. Expected:<bb>. Actual:<b\c>. 
Assert.AreEqual failed. Expected:<abc>. Actual:<[b\c]a{103}>. 
at FXP_COM.Tests.EnumToStringConverterterTests.<>c__DisplayClass3.<ShouldConvert>b__0() in UnitTest1.cs: line 31
at FXP_COM.Tests.AssertAll.Succeed(Action[] assertions) in UnitTest1.cs: line 46 at FXP_COM.Tests.AssertAll.Succeed(Action[] assertions) in UnitTest1.cs: line 62
at FXP_COM.Tests.EnumToStringConverterterTests.ShouldConvert() in UnitTest1.cs: line 30

and the helper class is the following:

using System;
using NUnit.Framework;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;

public static class AssertAll
{
    public static void Succeed(params Action[] assertions)
    {
        var errors = new List<Exception>();

        foreach (var assertion in assertions)
            try
            {
                assertion();
            }
            catch (Exception ex)
            {
                errors.Add(ex);
            }

        if (errors.Any())
        {
            var ex = new AssertionException(
                string.Join(Environment.NewLine, errors.Select(e => e.Message)),
                errors.First());

            // Use stack trace from the first exception to ensure first
            // failed Assert is one click away
            ReplaceStackTrace(ex, errors.First().StackTrace);

            throw ex;
        }
    }

    static void ReplaceStackTrace(Exception exception, string stackTrace)
    {
        var remoteStackTraceString = typeof(Exception)
            .GetField("_remoteStackTraceString",
                BindingFlags.Instance | BindingFlags.NonPublic);

        remoteStackTraceString.SetValue(exception, stackTrace);
    }
}

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

No. Typically in this situation you would put all the code above the asserts into a setup method, then write each assert into its own test case.