Bugfix/183 no logs (#185)

* Attempt creating a reproduction for #183

* Add unit tests for local timezones

* Reset docker version

Author: EEParker

sample/Sample/Program.cs

@@ -1,5 +1,6 @@
 using Microsoft.Extensions.Configuration;
 using Serilog;
+using Serilog.Events;
 using Serilog.Sinks.Splunk;
 using System;
 using System.Collections.Generic;
@@ -54,6 +55,11 @@ public static async Task Main(string[] args)
                     await Task.Delay(1000);
                 }
 
+                logger.Information("Creating logger {MethodName}.", nameof(ReproduceGitHubIssue183));
+                ReproduceGitHubIssue183();
+
+                return;
+
                 logger.Information("Creating logger {MethodName}.", nameof(OverridingSubsecondPrecisionMicroseconds));
                 OverridingSubsecondPrecisionMicroseconds(eventsToCreate);
 
@@ -368,6 +374,28 @@ public static void AddCustomFields(int eventsToCreate)
 
             Log.CloseAndFlush();
         }
+
+        public static void ReproduceGitHubIssue183()
+        {
+            // Override Source
+            var loggerConfig = new LoggerConfiguration()
+                .MinimumLevel.Verbose()
+                .WriteTo.EventCollector(
+                    SPLUNK_ENDPOINT,
+                    Program.EventCollectorToken,
+                    restrictedToMinimumLevel: LogEventLevel.Debug);
+
+            using (var logger = loggerConfig.CreateLogger())
+            {
+                Log.Logger = logger;
+
+                logger.Information("Information message {@param}", new { Property1 = 1, Property2 = 2 });
+                logger.Warning("Warning message {@param}", "Hello this is a string");
+                logger.Error(new Exception("Bang"), "Error message");
+            }
+
+            Log.CloseAndFlush();
+        }
     }
 
 

src/Serilog.Sinks.Splunk/Sinks/Splunk/Epoch.cs

@@ -41,7 +41,7 @@ public static string ToEpoch(this DateTimeOffset value, SubSecondPrecision subSe
             // or Monday, June 1, 2015, at 7:50:55 PM GMT.
             // See: https://docs.splunk.com/Documentation/Splunk/9.2.0/SearchReference/Commontimeformatvariables
 
-            var totalSeconds = ToSeconds(value.Ticks - Epoch.Ticks);
+            var totalSeconds = ToSeconds(value.ToUniversalTime().Ticks - Epoch.Ticks);
             var format = subSecondPrecision switch {
                 SubSecondPrecision.Nanoseconds => NanosecondFormat,
                 SubSecondPrecision.Microseconds => MicrosecondFormat,

test/Serilog.Sinks.Splunk.Tests/EpochExtensionsTests.cs

@@ -7,6 +7,47 @@ namespace Serilog.Sinks.Splunk.Tests
 {
     public class EpochExtensionsTests
     {
+        [Theory]
+        [InlineData(1)]
+        [InlineData(2)]
+        [InlineData(3)]
+        [InlineData(4)]
+        [InlineData(5)]
+        [InlineData(6)]
+        [InlineData(7)]
+        [InlineData(8)]
+        [InlineData(9)]
+        [InlineData(10)]
+        [InlineData(11)]
+        [InlineData(12)]
+        [InlineData(13)]
+        [InlineData(14)]
+        [InlineData(-1)]
+        [InlineData(-2)]
+        [InlineData(-3)]
+        [InlineData(-4)]
+        [InlineData(-5)]
+        [InlineData(-6)]
+        [InlineData(-7)]
+        [InlineData(-7.5)]
+        [InlineData(-8)]
+        [InlineData(-9)]
+        [InlineData(-10)]
+        [InlineData(-11)]
+        public void ToEpochLocalTime_ShouldReturnCorrectEpochTime(float timeZoneOffset)
+        {
+            // Arrange
+            var dateTimeOffset = new DateTimeOffset(2022, 1, 1, 0, 0, 0, TimeSpan.FromHours(timeZoneOffset)).AddHours(timeZoneOffset);
+            var expectedEpochTime = "1640995200.000"; // Epoch time for 2022-01-01 00:00:00
+
+            // Act
+            var result = dateTimeOffset.ToEpoch();
+
+            // Assert
+            Assert.Equal(expectedEpochTime, result);
+        }
+
+
         [Fact]
         public void ToEpoch_ShouldReturnCorrectEpochTime()
         {