Merge pull request #123 from 0xced/Fix-NullReferenceException

Fix NullReferenceException

Author: adrianiftode

src/FluentAssertions.Web/HttpResponseMessageFormatter.cs

@@ -105,9 +105,9 @@ private static void AppendProtocolAndStatusCode(StringBuilder messageBuilder, Ht
         messageBuilder.AppendLine($@"HTTP/{response.Version} {(int)response.StatusCode} {response.StatusCode}");
     }
 
-    private static void AppendContentLength(StringBuilder messageBuilder, HttpContent content)
+    private static void AppendContentLength(StringBuilder messageBuilder, HttpContent? content)
     {
-        if (content.Headers.TryGetValues("Content-Length", out var values))
+        if (content != null && content.Headers.TryGetValues("Content-Length", out var values))
         {
             foreach (var value in values)
             {

test/FluentAssertions.Web.Tests/HttpResponseMessageFormatterSpecs.cs

@@ -312,6 +312,25 @@ The originating HTTP request was <null>.*
             """);
     }
 
+    [Fact]
+    public void GivenRequestWithoutContent_ShouldNotThrowAnyException()
+    {
+        // Arrange
+        var formattedGraph = new FormattedObjectGraph(maxLines: 100);
+        using var subject = new HttpResponseMessage(HttpStatusCode.OK)
+        {
+            RequestMessage = new HttpRequestMessage(HttpMethod.Post, "http://localhost:5001/"),
+        };
+        var sut = new HttpResponseMessageFormatter();
+
+        // Act
+        sut.Format(subject, formattedGraph, null!, null!);
+
+        // Assert
+        var formatted = formattedGraph.ToString();
+        formatted.Should().NotContain("An exception occurred");
+    }
+
     [Fact]
     public void GivenRequest_ShouldPrintRequestDetails()
     {