Forgot to commit the test class file in previous commit

But now we have our first test running, checking that it failed & it now passes as expected

src/Umbraco.Tests/Logging/LogviewerTests.cs

@@ -0,0 +1,65 @@
+using NUnit.Framework;
+using System;
+using System.IO;
+using Umbraco.Core.IO;
+using Umbraco.Core.Logging.Viewer;
+
+namespace Umbraco.Tests.Logging
+{
+    [TestFixture]
+    public class LogviewerTests
+    {
+        private ILogViewer _logViewer;
+
+        const string _logfileName = "UmbracoTraceLog.UNITTEST.20181112.json";
+        const string _searchfileName = "logviewer.searches.config.js";
+
+        private string _newLogfilePath;
+        private string _newLogfileDirPath;
+
+        private string _newSearchfilePath;
+        private string _newSearchfileDirPath;
+
+        private DateTimeOffset _startDate = new DateTime(year: 2018, month: 11, day: 12, hour:0, minute:0, second:0);
+        private DateTimeOffset _endDate = new DateTime(year: 2018, month: 11, day: 13, hour: 0, minute: 0, second: 0);
+
+        [OneTimeSetUp]
+        public void Setup()
+        {
+            //Create an example JSON log file to check results
+            //As a one time setup for all tets in this class/fixture
+
+            var exampleLogfilePath = Path.Combine(TestContext.CurrentContext.TestDirectory, @"Logging\", _logfileName);
+            _newLogfileDirPath = Path.Combine(TestContext.CurrentContext.TestDirectory, @"App_Data\Logs\");
+            _newLogfilePath = Path.Combine(_newLogfileDirPath, _logfileName);
+
+            var exampleSearchfilePath = Path.Combine(TestContext.CurrentContext.TestDirectory, @"Logging\", _searchfileName);
+            _newSearchfileDirPath = Path.Combine(TestContext.CurrentContext.TestDirectory, @"Config\");
+            _newSearchfilePath = Path.Combine(_newSearchfileDirPath, _searchfileName);
+
+            //Create/ensure Directory exists
+            IOHelper.EnsurePathExists(_newLogfileDirPath);
+            IOHelper.EnsurePathExists(_newSearchfileDirPath);
+
+            //Copy the sample files
+            File.Copy(exampleLogfilePath, _newLogfilePath, true);
+            File.Copy(exampleSearchfilePath, _newSearchfilePath, true);
+
+            _logViewer = new JsonLogViewer(logsPath: _newLogfileDirPath, searchPath: _newSearchfilePath);
+        }
+
+        [OneTimeTearDown]
+        public void TearDown()
+        {
+            //Cleanup & delete the example log & search files off disk
+            //Once all tests in this class/fixture have run
+            if (File.Exists(_newLogfilePath))
+                File.Delete(_newLogfilePath);
+
+            if (File.Exists(_newSearchfilePath))
+                File.Delete(_newSearchfilePath);
+        }
+
+        
+    }
+}