(#170) Add extension methods to write output from logger or provider

Author: colinangusmackay

src/Stravaig.Extensions.Logging.Diagnostics.Tests/XUnit/OutputTestHelperExtensionsTests.cs

@@ -26,7 +26,7 @@ public void WriteLine(string format, params object[] args)
     }
 
     [Test]
-    public void RenderedLogMessagesGetSentToOutputTestHelper()
+    public void RenderedLogEntryMessagesSentToOutputTestHelper()
     {
         ResetLogSequence();
         var outputHelper = new OutputHelper();
@@ -36,11 +36,47 @@ public void RenderedLogMessagesGetSentToOutputTestHelper()
 
         var logs = logger.GetLogs();
         outputHelper.WriteLogs(logs);
-        
+
+        outputHelper.Messages[0].ShouldBe("[0 Information Stravaig.Extensions.Logging.Diagnostics.Tests.XUnit.OutputTestHelperExtensionTests] This is an information Message.");
+        outputHelper.Messages[1].ShouldBe("[1 Information Stravaig.Extensions.Logging.Diagnostics.Tests.XUnit.OutputTestHelperExtensionTests] This is a Warning Message.");
+    }
+
+    [Test]
+    public void RenderedLoggerSentToOutputTestHelper()
+    {
+        ResetLogSequence();
+        var outputHelper = new OutputHelper();
+        var logger = new TestCaptureLogger<OutputTestHelperExtensionTests>();
+        logger.LogInformation("This is an information Message.");
+        logger.LogInformation("This is a Warning Message.");
+
+        outputHelper.WriteLogs(logger);
+
         outputHelper.Messages[0].ShouldBe("[0 Information Stravaig.Extensions.Logging.Diagnostics.Tests.XUnit.OutputTestHelperExtensionTests] This is an information Message.");
         outputHelper.Messages[1].ShouldBe("[1 Information Stravaig.Extensions.Logging.Diagnostics.Tests.XUnit.OutputTestHelperExtensionTests] This is a Warning Message.");
     }
 
+    [Test]
+    public void RenderedLoggerProviderSentToOutputTestHelper()
+    {
+        ResetLogSequence();
+        var outputHelper = new OutputHelper();
+        var loggerProvider = new TestCaptureLoggerProvider();
+        var logger1 = loggerProvider.CreateLogger("logger1");
+        var logger2 = loggerProvider.CreateLogger("logger2");
+        logger1.LogInformation("This is an information Message on the first logger.");
+        logger2.LogInformation("This is an information Message on the second logger.");
+        logger2.LogWarning("This is a Warning Message on the second logger.");
+        logger1.LogWarning("This is a Warning Message on the first logger.");
+
+        outputHelper.WriteLogs(loggerProvider);
+
+        outputHelper.Messages[0].ShouldBe("[0 Information logger1] This is an information Message on the first logger.");
+        outputHelper.Messages[1].ShouldBe("[1 Information logger2] This is an information Message on the second logger.");
+        outputHelper.Messages[2].ShouldBe("[2 Warning logger2] This is a Warning Message on the second logger.");
+        outputHelper.Messages[3].ShouldBe("[3 Warning logger1] This is a Warning Message on the first logger.");
+    }
+
     private void ResetLogSequence()
     {
         var logEntryType = typeof(LogEntry);
@@ -49,4 +85,4 @@ private void ResetLogSequence()
             throw new InvalidOperationException("Expected LogEntry to have a private field called _sequence.");
         field.SetValue(null, 0);
     }
-}
+}

src/Stravaig.Extensions.Logging.Diagnostics.XUnit/OutputTestHelperExtensions.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using Microsoft.Extensions.Logging;
 using Stravaig.Extensions.Logging.Diagnostics.Render;
 using Xunit.Abstractions;
 
@@ -15,9 +16,27 @@ public static class OutputTestHelperExtensions
     /// </summary>
     /// <param name="output">The xunit test output helper.</param>
     /// <param name="logEntries">The log entries.</param>
-    /// <param name="formatter"></param>
+    /// <param name="formatter">An optional formatter that defines how the log entry is to be written.</param>
     public static void WriteLogs(this ITestOutputHelper output, IEnumerable<LogEntry> logEntries, Func<LogEntry, string>? formatter = null)
     {
         logEntries.RenderLogs(formatter ?? Formatter.SimpleBySequence, output.WriteLine);
     }
-}
+
+    /// <summary>
+    /// Write the logs to the xunit test output helper.
+    /// </summary>
+    /// <param name="output">The xunit test output helper.</param>
+    /// <param name="logger">The logger from which to output the captured logs.</param>
+    /// <param name="formatter">An optional formatter that defines how the log entry is to be written.</param>
+    public static void WriteLogs(this ITestOutputHelper output, ITestCaptureLogger logger, Func<LogEntry, string>? formatter = null)
+         => output.WriteLogs(logger.GetLogs(), formatter);
+
+    /// <summary>
+    /// Write the logs to the xunit test output helper.
+    /// </summary>
+    /// <param name="output">The xunit test output helper.</param>
+    /// <param name="provider">The log provider from which to output the captured logs.</param>
+    /// <param name="formatter">An optional formatter that defines how the log entry is to be written.</param>
+    public static void WriteLogs(this ITestOutputHelper output, TestCaptureLoggerProvider provider, Func<LogEntry, string>? formatter = null)
+         => output.WriteLogs(provider.GetAllLogEntries(), formatter);
+}