Add missing target manager tests (#2312)

* Add missing target manager tests

* skip on firefox

Author: kblok

lib/PuppeteerSharp.Tests/TargetManagerTests/TargetManagerTests.cs

@@ -0,0 +1,67 @@
+
+using Microsoft.AspNetCore.Http;
+using PuppeteerSharp.Tests.Attributes;
+using PuppeteerSharp.Nunit;
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using NUnit.Framework;
+using PuppeteerSharp.Helpers;
+
+namespace PuppeteerSharp.Tests.TargetManagerTests
+{
+    public class TargetManagerTests : PuppeteerBrowserContextBaseTest
+    {
+        public TargetManagerTests(): base()
+        {
+            DefaultOptions = TestConstants.DefaultBrowserOptions();
+            DefaultOptions.Args = new[]
+            {
+                "--site-per-process",
+                "--remote-debugging-port=21222",
+                "--host-rules=\"MAP * 127.0.0.1\"",
+            };
+        }
+
+        [PuppeteerTest("TargetManager.spec.ts", "TargetManager", "should handle targets")]
+        [Skip(SkipAttribute.Targets.Firefox)]
+
+        public async Task ShouldHandleTargets()
+        {
+            var targetManager = (Browser as Browser).TargetManager;
+            Assert.AreEqual(2, targetManager.GetAvailableTargets().Values.Count);
+
+            Assert.IsEmpty(await Context.PagesAsync());
+            Assert.AreEqual(2, targetManager.GetAvailableTargets().Values.Count);
+
+            var page = await Context.NewPageAsync();
+            Assert.AreEqual(1, (await Context.PagesAsync()).Length);
+            Assert.AreEqual(3, targetManager.GetAvailableTargets().Values.Count);
+
+            await page.GoToAsync(TestConstants.EmptyPage);
+            Assert.AreEqual(1, (await Context.PagesAsync()).Length);
+            Assert.AreEqual(3, targetManager.GetAvailableTargets().Values.Count);
+
+            var frameTask = page.WaitForFrameAsync(target => target.Url == TestConstants.EmptyPage);
+            await FrameUtils.AttachFrameAsync(page, "frame1", TestConstants.EmptyPage);
+            await frameTask.WithTimeout();
+            Assert.AreEqual(1, (await Context.PagesAsync()).Length);
+            Assert.AreEqual(3, targetManager.GetAvailableTargets().Values.Count);
+            Assert.AreEqual(2, page.Frames.Length);
+
+            frameTask = page.WaitForFrameAsync(target => target.Url == TestConstants.CrossProcessUrl + "/empty.html");
+            await FrameUtils.AttachFrameAsync(page, "frame2", TestConstants.CrossProcessUrl + "/empty.html");
+            await frameTask.WithTimeout();
+            Assert.AreEqual(1, (await Context.PagesAsync()).Length);
+            Assert.AreEqual(4, targetManager.GetAvailableTargets().Values.Count);
+            Assert.AreEqual(3, page.Frames.Length);
+
+            frameTask = page.WaitForFrameAsync(target => target.Url == TestConstants.CrossProcessUrl + "/empty.html");
+            await FrameUtils.AttachFrameAsync(page, "frame3", TestConstants.CrossProcessUrl + "/empty.html");
+            await frameTask.WithTimeout();
+            Assert.AreEqual(1, (await Context.PagesAsync()).Length);
+            Assert.AreEqual(5, targetManager.GetAvailableTargets().Values.Count);
+            Assert.AreEqual(4, page.Frames.Length);
+        }
+    }
+}