Fix windows tests

SDK/AppCenter/Microsoft.AppCenter.WindowsDesktop/Utils/DeviceInformationHelper.cs

@@ -187,7 +187,7 @@ namespace Microsoft.AppCenter.Utils
 
         protected override string GetAppBuild()
         {
-            return DeploymentVersion ?? AssemblyVersion.FileVersion ?? _defaultVersion;
+            return DeploymentVersion ?? AssemblyVersion?.FileVersion ?? _defaultVersion;
         }
 
         protected override string GetScreenSize()
@@ -207,7 +207,7 @@ namespace Microsoft.AppCenter.Utils
                 catch
                 {
                     var assemblyVersion = AssemblyVersion;
-                    return assemblyVersion.ProductVersion ?? assemblyVersion.FileVersion;
+                    return assemblyVersion?.ProductVersion ?? assemblyVersion?.FileVersion;
                 }
             }
         }

Tests/Microsoft.AppCenter.Crashes.Test.Windows/CrashesTest.cs

@@ -61,6 +61,7 @@ namespace Microsoft.AppCenter.Crashes.Test.Windows
             Crashes.ShouldAwaitUserConfirmation = null;
             Crashes.GetErrorAttachments = null;
             AppCenter.Instance.ApplicationSettings.Remove(Crashes.PrefKeyAlwaysSend);
+            AppCenter.Instance.ApplicationSettings.Remove(AppCenter.EnabledKey);
         }
 
         [TestMethod]

Tests/Microsoft.AppCenter.Test.UWP/AppCenterTest.cs

@@ -108,40 +108,6 @@ namespace Microsoft.AppCenter.Test.UWP
             }
         }
 
-        [TestMethod]
-        public void TestDbInitializationFolderNotExists()
-        {
-            // Make sure database directory does not exist before test.
-            if (Directory.Exists(Constants.AppCenterDatabasePath))
-            {
-                new DirectoryInfo(Constants.AppCenterDatabasePath).Delete(false);
-            }
-            using (var storageMock = new Storage.Storage())
-            {
-                storageMock.WaitOperationsAsync(TimeSpan.FromSeconds(10)).Wait();
-
-                // Verify that database is created inside local app data folder, and not locally.
-                Assert.IsTrue(File.Exists(Path.Combine(Constants.LocalAppData, Constants.AppCenterDatabaseFilename)));
-            }
-        }
-
-        [TestMethod]
-        public void TestDbInitializationFolderExists()
-        {
-            // Make sure database directory exists before test.
-            if (!Directory.Exists(Constants.AppCenterDatabasePath))
-            {
-                new DirectoryInfo(Constants.AppCenterDatabasePath).Create();
-            }
-            using (var storageMock = new Storage.Storage())
-            {
-                storageMock.WaitOperationsAsync(TimeSpan.FromSeconds(10)).Wait();
-
-                // Verify that database is created inside local app data folder, and not locally.
-                Assert.IsTrue(File.Exists(Path.Combine(Constants.LocalAppData, Constants.AppCenterDatabaseFilename)));
-            }
-        }
-
         /// <summary>
         /// Start service after unhandled exception
         /// </summary>