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using System;
using System.Globalization;
using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;
#if UITEST
using Xamarin.Forms.Core.UITests;
using Xamarin.UITest;
using NUnit.Framework;
#endif
namespace Xamarin.Forms.Controls.Issues
{
#if UITEST
[Category(UITestCategories.Image)]
#endif
[Preserve(AllMembers = true)]
[Issue(IssueTracker.Bugzilla, 51173, "ImageRenderer, async void SetImage - Cannot catch exceptions", PlatformAffected.All)]
public class Bugzilla51173 : TestContentPage
{
#if UITEST
[Test(Description = "Attempt to load an image from a URI which does not exist")]
public void Bugzilla51173_NonexistentUri()
{
RunningApp.WaitForElement(q => q.Marked(UriDoesNotExist));
RunningApp.Tap(UriDoesNotExist);
RunningApp.WaitForElement(q => q.Marked(ErrorLogged));
RunningApp.WaitForElement(q => q.Marked(NotLoading));
}
[Test(Description = "The IImageSourceHandler itself throws an exception")]
public void Bugzilla51173_HandlerThrowsException()
{
RunningApp.WaitForElement(q => q.Marked(HandlerThrows));
RunningApp.Tap(HandlerThrows);
RunningApp.WaitForElement(q => q.Marked(ErrorLogged));
RunningApp.WaitForElement(q => q.Marked(NotLoading));
}
[Test(Description = "The URI is valid, but the image data is not")]
public void Bugzilla51173_RealUriWithInvalidImageData()
{
RunningApp.WaitForElement(q => q.Marked(RealUriInvalidImage));
RunningApp.Tap(RealUriInvalidImage);
RunningApp.WaitForElement(q => q.Marked(ErrorLogged));
RunningApp.WaitForElement(q => q.Marked(NotLoading));
}
[Test(Description = "Attempt to load a local image which does not exist")]
public void Bugzilla51173_NonexistentImage()
{
RunningApp.WaitForElement(q => q.Marked(ImageDoesNotExist));
RunningApp.Tap(ImageDoesNotExist);
RunningApp.WaitForElement(q => q.Marked(ErrorLogged));
RunningApp.WaitForElement(q => q.Marked(NotLoading));
}
[Test(Description = "Attempt to load a local image which exists, but has corrupt data")]
public void Bugzilla51173_InvalidImage()
{
RunningApp.WaitForElement(q => q.Marked(ImageIsInvalid));
RunningApp.Tap(ImageIsInvalid);
RunningApp.WaitForElement(q => q.Marked(ErrorLogged));
RunningApp.WaitForElement(q => q.Marked(NotLoading));
}
[Test(Description = "Load a valid image")]
public void Bugzilla51173_ValidImage()
{
RunningApp.WaitForElement(q => q.Marked(ValidImage));
RunningApp.Tap(ValidImage);
RunningApp.WaitForElement(q => q.Marked(NotLoading));
}
#endif
const string ValidImage = "Valid Image";
const string ImageDoesNotExist = "Non-existent Image File";
const string ImageIsInvalid = "Invalid Image File (bad data)";
const string UriDoesNotExist = "Non-existent URI";
const string HandlerThrows = "Source Throws Exception";
const string RealUriInvalidImage = "Valid URI with invalid image file";
const string ErrorLogged = "Error logged";
const string Loading = "Loading";
const string NotLoading = "Not Loading";
Label _results;
Image _image;
class LoadingConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if ((bool)value)
{
return Loading;
}
return NotLoading;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
protected override void Init()
{
_results = new Label { Margin = 10, FontAttributes = FontAttributes.Bold, BackgroundColor = Color.Silver, HorizontalTextAlignment = TextAlignment.Center};
var errorMessage = new Label();
Log.Listeners.Add(
new DelegateLogListener((c, m) => Device.BeginInvokeOnMainThread(() =>
{
_results.Text = ErrorLogged;
errorMessage.Text = m;
})));
var instructions = new Label
{
Text =
"Pressing the 'Valid Image' button should display an image of a coffee cup. Every other button should cause the messager 'Error logged' to appear at the top of the page."
};
_image = new Image { BackgroundColor = Color.Bisque, HeightRequest = 20 };
var loadingState = new Label();
loadingState.SetBinding(Label.TextProperty, new Binding(Image.IsLoadingProperty.PropertyName, BindingMode.Default, new LoadingConverter()));
loadingState.BindingContext = _image;
var legit = CreateTest(() => _image.Source = ImageSource.FromFile("coffee.png"), ValidImage);
var invalidImageFileName = CreateTest(() => _image.Source = ImageSource.FromFile("fake.png"), ImageDoesNotExist);
var invalidImageFile = CreateTest(() => _image.Source = ImageSource.FromFile("invalidimage.jpg"), ImageIsInvalid);
var fakeUri = CreateTest(() => _image.Source = ImageSource.FromUri(new Uri("http://not.real")), UriDoesNotExist);
var crashImage = CreateTest(() => _image.Source = new FailImageSource(), HandlerThrows);
var uriInvalidImageData =
CreateTest(() => _image.Source = ImageSource.FromUri(new Uri("https://gist.githubusercontent.com/hartez/a2dda6b5c78852bcf4832af18f21a023/raw/39f4cd2e9fe8514694ac7fa0943017eb9308853d/corrupt.jpg")),
RealUriInvalidImage);
Content = new StackLayout
{
Margin = new Thickness(5, 20, 5, 0),
Children =
{
_image,
instructions,
legit,
invalidImageFileName,
invalidImageFile,
fakeUri,
crashImage,
uriInvalidImageData,
_results,
loadingState,
errorMessage
}
};
}
Button CreateTest(Action imageLoadAction, string title)
{
var button = new Button { Text = title };
button.Clicked += (sender, args) =>
{
_results.Text = "";
imageLoadAction();
};
return button;
}
}
}
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