Fix missing output attachments in NUnit adapter

Allure.NUnit.Examples/OutputTest.cs

@@ -0,0 +1,33 @@
+using System;
+using System.IO;
+using System.Linq;
+using Allure.Net.Commons;
+using NUnit.Allure.Attributes;
+using NUnit.Framework;
+
+namespace Allure.NUnit.Examples
+{
+    [AllureSuite("Tests - Output")]
+    public class OutputTest : BaseTest
+    {
+        private const string text = "This should go to console output attachment";
+
+        [Test]
+        [Order(1)]
+        public void WriteOutputTest()
+        {
+            Console.WriteLine(text);
+        }
+
+        [Test]
+        [Order(2)]
+        public void OutputLogShouldExist()
+        {
+            var resultsDir = AllureLifecycle.Instance.ResultsDirectory;
+            var attachmentFiles = Directory.EnumerateFiles(resultsDir, "*.txt");
+
+            Assert.That(attachmentFiles.Any(file => File.ReadAllText(file).Contains(text)));
+        }
+    }
+}
+

Allure.NUnit/Core/AllureNUnitHelper.cs

@@ -85,6 +85,8 @@ private TestFixture GetTestFixture(ITest test)
         internal void StopTestCase()
         {
             UpdateTestDataFromAttributes();
+            AddConsoleOutputAttachment();
+
             for (var i = 0; i < _test.Arguments.Length; i++)
             {
                 AllureLifecycle.UpdateTestCase(x => x.parameters.Add(new Parameter
@@ -176,6 +178,13 @@ private void UpdateTestDataFromAttributes()
             });
         }
 
+        private void AddConsoleOutputAttachment()
+        {
+            var output = TestExecutionContext.CurrentContext.CurrentResult.Output;
+            AllureLifecycle.AddAttachment("Console Output", "text/plain", 
+                Encoding.UTF8.GetBytes(output), ".txt");
+        }
+
         private IEnumerable<string> GetTestProperties(string name)
         {
             var list = new List<string>();