Add missing network tests (#1901)

Author: kblok

lib/PuppeteerSharp.Tests/NetworkTests/NetworkEventTests.cs

@@ -36,6 +36,18 @@ public async Task PageEventsRequest()
             Assert.Equal(TestConstants.EmptyPage, requests[0].Frame.Url);
         }
 
+        [PuppeteerTest("network.spec.ts", "Network Events", "Page.Events.RequestServedFromCache")]
+        [SkipBrowserFact(skipFirefox: true)]
+        public async Task PageEventsRequestServedFromCache()
+        {
+            var cached= new List<string>();
+            Page.RequestServedFromCache += (_, e) => cached.Add(e.Request.Url.Split('/').Last());
+            await Page.GoToAsync(TestConstants.ServerUrl + "/cached/one-style.html");
+            Assert.Empty(cached);
+            await Page.ReloadAsync();
+            Assert.Equal(new[] { "one-style.css" }, cached);
+        }
+
         [PuppeteerTest("network.spec.ts", "Network Events", "Page.Events.Response")]
         [SkipBrowserFact(skipFirefox: true)]
         public async Task PageEventsResponse()

lib/PuppeteerSharp.Tests/NetworkTests/ResponseHeadersTests.cs

@@ -13,7 +13,7 @@ public ResponseHeadersTests(ITestOutputHelper output) : base(output)
         {
         }
 
-        [PuppeteerTest("network.spec.ts", "Request.headers", "should work")]
+        [PuppeteerTest("network.spec.ts", "Response.headers", "should work")]
         [PuppeteerFact]
         public async Task ShouldWork()
         {

lib/PuppeteerSharp.Tests/WontImplementTests.cs

@@ -44,6 +44,7 @@ public WontImplementTests(ITestOutputHelper output) : base(output)
         [PuppeteerTest("waittask.spec.ts", "Page.waitFor", "should log a deprecation warning")]
         [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should accept a string")]
         [PuppeteerTest("waittask.spec.ts", "Frame.waitForFunction", "should throw on bad polling value")]
+        [PuppeteerTest("network.spec.ts", "Page.setExtraHTTPHeaders", "should throw for non-string header values")]
         [PuppeteerFact]
         public void TheseTesstWontBeImplemented()
         {