/// <summary>
/// Async wrapper for database init followed by proper page transition
/// </summary>
private async void AsyncInit()
{
// Initialize database
await Task.Run(() => DataService.Initialize());
// If there are accounts, start in the accounts view
using (var dataService = new DataService())
{
if (dataService.AnyExistingAccounts())
_modernNavigationService.NavigateTo(nameof(ViewModelLocator.Accounts));
else
// No existing accounts, show welcome screen
_modernNavigationService.NavigateTo(nameof(ViewModelLocator.Welcome));
}
//prevent the user from navigating to this point or further back
_modernNavigationService.ClearNavigationHistory();
}
public void TestAnyExistingAccount()
{
// Mock setup for DataService
var mockSet = new Mock<DbSet<Account>>();
var mockContext = new Mock<SoCashDbContext>(MockBehavior.Loose);
mockContext.Setup(m => m.Accounts).Returns(mockSet.Object);
mockContext.Setup(m => m.Set<Account>()).Returns(mockSet.Object);
// Start with empty account list
var data = new List<Account>();
mockSet.As<IQueryable<Account>>().Setup(m => m.Provider).Returns(data.AsQueryable().Provider);
mockSet.As<IQueryable<Account>>().Setup(m => m.Expression).Returns(data.AsQueryable().Expression);
mockSet.As<IQueryable<Account>>().Setup(m => m.ElementType).Returns(data.AsQueryable().ElementType);
mockSet.As<IQueryable<Account>>().Setup(m => m.GetEnumerator()).Returns(data.GetEnumerator());
// No accounts in DB
using (var service = new DataService(mockContext.Object))
Assert.IsFalse(service.AnyExistingAccounts());
// Add some records
data.Add(new Account {AccountName = "Acct1", AccountType = AccountType.Checking.ToString(),Currency = "USD"});
data.Add(new Account {AccountName = "Acct2", AccountType = AccountType.Savings.ToString(), Currency = "USD"});
data.Add(new Account {AccountName = "Acct3", AccountType = AccountType.Creditcard.ToString(), Currency = "USD"});
// There are now accounts in the db
using (var service = new DataService(mockContext.Object))
Assert.IsTrue(service.AnyExistingAccounts());
// Verify that both transactions ended properly
mockContext.Verify(m => m.SaveChanges(), Times.Exactly(2));
}