public void OnNavigatedTo_WithIncorrectId_ShouldReturnToPreviousPage()
{
// Arrange
var alertTitle = "Niet gevonden!";
var alertMessage = "Het recept kan niet geladen worden.";
var alertCancelButton = "Ok";
var incorrectId = Guid.NewGuid();
var parameters = new NavigationParameters
{
{ "SelectedRecipe", incorrectId }
};
DatabaseServiceMock.Setup(databaseService => databaseService.GetRecipeAsync(SelectedRecipe.Id)).Returns(Task.Run(() => SelectedRecipe));
DatabaseServiceMock.Setup(databaseService => databaseService.GetRecipeAsync(incorrectId)).Returns(() => null);
PageDialogServiceMock.Setup(dialogService => dialogService.DisplayAlertAsync(alertTitle, alertMessage, alertCancelButton)).Verifiable();
NavigationServiceMock.Setup(navigationService => navigationService.GoBackAsync()).Verifiable();
// Act
DisplayRecipePageViewModel.OnNavigatedTo(parameters);
// Assert
DatabaseServiceMock.Verify(databaseService => databaseService.GetRecipeAsync(SelectedRecipe.Id), Times.Never, "Function IDatabaseService.GetRecipeAsync for selected recipe called atleast once.");
DatabaseServiceMock.Verify(databaseService => databaseService.GetRecipeAsync(incorrectId), Times.Once, "Function IDatabaseService.GetRecipeAsync for non-existant recipe not called exactly once.");
PageDialogServiceMock.Verify(dialogService => dialogService.DisplayAlertAsync(alertTitle, alertMessage, alertCancelButton), Times.Once, "Alert for failed retrieving of recipe not called exactly once.");
NavigationServiceMock.Verify(navigationService => navigationService.GoBackAsync(), Times.Once, "Function INavigationService.GoBackAsync not called exactly once.");
}
public void OnNavigatedTo_WithoutParametersWhenRecipeIsNull_ShouldReturnToPreviousPage()
{
// Arrange
var alertTitle = "Niet gevonden!";
var alertMessage = "Het recept kan niet geladen worden.";
var alertCancelButton = "Ok";
DatabaseServiceMock.Setup(databaseService => databaseService.GetRecipeAsync(SelectedRecipe.Id)).Returns(() => null);
PageDialogServiceMock.Setup(dialogService => dialogService.DisplayAlertAsync(alertTitle, alertMessage, alertCancelButton)).Verifiable();
NavigationServiceMock.Setup(navigationService => navigationService.GoBackAsync()).Verifiable();
// Act
DisplayRecipePageViewModel.OnNavigatedTo(null);
// Assert
DatabaseServiceMock.Verify(databaseService => databaseService.GetRecipeAsync(SelectedRecipe.Id), Times.Never, "Function IDatabaseService.GetRecipeAsync for selected recipe called atleast once.");
PageDialogServiceMock.Verify(dialogService => dialogService.DisplayAlertAsync(alertTitle, alertMessage, alertCancelButton), Times.Once, "Alert for failed retrieving of recipe not called exactly once.");
NavigationServiceMock.Verify(navigationService => navigationService.GoBackAsync(), Times.Once, "Function INavigationService.GoBackAsync not called exactly once.");
}
public void OnNavigatedTo_WithCorrectParameters_ShouldSetSelectedRecipe()
{
// Arrange
var alertTitle = "Niet gevonden!";
var alertMessage = "Het recept kan niet geladen worden.";
var alertCancelButton = "Ok";
var parameters = new NavigationParameters
{
{ "SelectedRecipe", SelectedRecipe.Id }
};
DatabaseServiceMock.Setup(databaseService => databaseService.GetRecipeAsync(SelectedRecipe.Id)).Returns(Task.Run(() => SelectedRecipe));
PageDialogServiceMock.Setup(dialogService => dialogService.DisplayAlertAsync(alertTitle, alertMessage, alertCancelButton)).Verifiable();
NavigationServiceMock.Setup(navigationService => navigationService.GoBackAsync()).Verifiable();
// Act
DisplayRecipePageViewModel.OnNavigatedTo(parameters);
// Assert
DatabaseServiceMock.Verify(databaseService => databaseService.GetRecipeAsync(SelectedRecipe.Id), Times.Once, "Function IDatabaseService.GetRecipeAsync for selected recipe not called exactly once.");
PageDialogServiceMock.Verify(dialogService => dialogService.DisplayAlertAsync(alertTitle, alertMessage, alertCancelButton), Times.Never, "Alert for failed retrieving of recipe called atleast once.");
NavigationServiceMock.Verify(navigationService => navigationService.GoBackAsync(), Times.Never, "Function INavigationService.GoBackAsync called atleast once.");
Assert.AreEqual(SelectedRecipe, DisplayRecipePageViewModel.Recipe, "Attribute DisplayRecipePageViewModel.Recipe is not the expected value.");
}