Try fix remaining tests

Author: softworkz

src/ElectronNET.IntegrationTests/Tests/BrowserWindowTests.cs

@@ -202,10 +202,16 @@ public async Task Represented_filename_and_edited_flags()
             var temp = Path.Combine(Path.GetTempPath(), "electronnet_test.txt");
             File.WriteAllText(temp, "test");
             win.SetRepresentedFilename(temp);
+
+            await Task.Delay(500);
+
             var represented = await win.GetRepresentedFilenameAsync();
             represented.Should().Be(temp);
 
             win.SetDocumentEdited(true);
+
+            await Task.Delay(500);
+
             var edited = await win.IsDocumentEditedAsync();
             edited.Should().BeTrue();
 

src/ElectronNET.IntegrationTests/Tests/NotificationTests.cs

@@ -1,5 +1,6 @@
 namespace ElectronNET.IntegrationTests.Tests
 {
+    using System.Runtime.InteropServices;
     using ElectronNET.API;
     using ElectronNET.API.Entities;
 
@@ -14,16 +15,20 @@ public async Task Notification_create_check()
             var options = new NotificationOptions("Notification Title", "Notification test 123");
             options.OnShow = () => tcs.SetResult();
 
+            await Task.Delay(500);
+
             Electron.Notification.Show(options);
 
             await Task.WhenAny(tcs.Task, Task.Delay(5_000));
 
             tcs.Task.IsCompletedSuccessfully.Should().BeTrue();
         }
 
-        [Fact(Timeout = 20000)]
+        [SkippableFact(Timeout = 20000)]
         public async Task Notification_is_supported_check()
         {
+            Skip.If(RuntimeInformation.IsOSPlatform(OSPlatform.Linux), "Always returns false, even when notifications work. Might need full-blown desktop environment");
+
             var supported = await Electron.Notification.IsSupportedAsync();
             supported.Should().BeTrue();
         }