Add headers tests (#999)

lib/PuppeteerSharp.Tests/NetworkTests/RequestHeadersTests.cs

@@ -0,0 +1,21 @@
+using System.Threading.Tasks;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace PuppeteerSharp.Tests.NetworkTests
+{
+    [Collection("PuppeteerLoaderFixture collection")]
+    public class RequestHeadersTests : PuppeteerPageBaseTest
+    {
+        public RequestHeadersTests(ITestOutputHelper output) : base(output)
+        {
+        }
+
+        [Fact]
+        public async Task ShouldWork()
+        {
+            var response = await Page.GoToAsync(TestConstants.EmptyPage);
+            Assert.Contains("Chrome", response.Request.Headers["User-Agent"]);
+        }
+    }
+}

lib/PuppeteerSharp.Tests/NetworkTests/ResponseHeadersTests.cs

@@ -0,0 +1,27 @@
+using System.Threading.Tasks;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace PuppeteerSharp.Tests.NetworkTests
+{
+    [Collection("PuppeteerLoaderFixture collection")]
+    public class ResponseHeadersTests : PuppeteerPageBaseTest
+    {
+        public ResponseHeadersTests(ITestOutputHelper output) : base(output)
+        {
+        }
+
+        [Fact]
+        public async Task ShouldWork()
+        {
+            Server.SetRoute("/empty.html", (context) =>
+            {
+                context.Response.Headers["foo"] = "bar";
+                return Task.CompletedTask;
+            });
+
+            var response = await Page.GoToAsync(TestConstants.EmptyPage);
+            Assert.Contains("bar", response.Headers["foo"]);
+        }
+    }
+}

lib/PuppeteerSharp/Messaging/ResponsePayload.cs

@@ -7,7 +7,7 @@ namespace PuppeteerSharp.Messaging
     internal class ResponsePayload
     {
         public string Url { get; set; }
-        public Dictionary<string, object> Headers { get; set; }
+        public Dictionary<string, string> Headers { get; set; }
         public HttpStatusCode Status { get; set; }
         public SecurityDetails SecurityDetails { get; set; }
         public bool FromDiskCache { get; set; }

lib/PuppeteerSharp/Response.cs

@@ -31,7 +31,7 @@ internal Response(
             _fromDiskCache = responseMessage.FromDiskCache;
             FromServiceWorker = responseMessage.FromServiceWorker;
 
-            Headers = new Dictionary<string, object>();
+            Headers = new Dictionary<string, string>();
             if (responseMessage.Headers != null)
             {
                 foreach (var keyValue in responseMessage.Headers)
@@ -59,7 +59,7 @@ internal Response(
         /// An object with HTTP headers associated with the response. All header names are lower-case.
         /// </summary>
         /// <value>The headers.</value>
-        public Dictionary<string, object> Headers { get; }
+        public Dictionary<string, string> Headers { get; }
         /// <summary>
         /// Contains the status code of the response
         /// </summary>