public async Task Test_OpenDiagram_When_PreviewAlreadyExists()
{
// Arrange.
string filePath = Path.Combine(diagramLocation.FullName, "TestFile.puml");
var existingDiagram = new Diagram {
File = new FileInfo(filePath)
};
var existingPreview = new PreviewDiagramViewModel(existingDiagram);
explorer.PreviewDiagrams.Add(existingPreview);
var diagramUri = new Uri(filePath, UriKind.Absolute);
diagramIO.Setup(io => io.ReadAsync(It.Is <FileInfo>(f => f.FullName == filePath)))
.Returns((FileInfo file) => Task.FromResult(new Diagram {
File = file
}));
OpenPreviewRequestedEventArgs openArgs = null;
explorer.OpenPreviewRequested += (o, e) => openArgs = e;
// Act.
var openedDiagram = await explorer.OpenDiagramAsync(diagramUri);
// Assert.
Assert.Same(existingDiagram, openedDiagram);
Assert.Same(existingPreview.Diagram, explorer.PreviewDiagrams.Single().Diagram);
Assert.NotNull(openArgs);
Assert.Same(existingPreview, openArgs.RequestedPreview);
}
public void Test_AddNewDiagramCommand_Unsuccessful()
{
// Arrange.
string newDiagramFilePath = Path.Combine(diagramLocation.FullName, "new-diagram.puml");
diagramIO.Setup(dio => dio.SaveAsync(It.IsAny <Diagram>(), It.IsAny <bool>()))
.Returns(Task.FromException(new InvalidOperationException()));
explorer.DiagramLocation = diagramLocation;
explorer.NewDiagramTemplate = "New Diagram";
OpenPreviewRequestedEventArgs newDiagramArgs = null;
explorer.OpenPreviewRequested += (o, e) => newDiagramArgs = e;
// Act.
explorer.AddNewDiagramCommand.Execute(new Uri(newDiagramFilePath));
// Assert.
Assert.Null(newDiagramArgs);
diagramIO.Verify(dio => dio.SaveAsync(
It.Is <Diagram>(d => d.Content == "New Diagram" && d.File.FullName == newDiagramFilePath),
false));
}
public void Test_AddNewDiagramCommand()
{
// Arrange.
string newDiagramFilePath = Path.Combine(diagramLocation.FullName, "new-diagram.puml");
explorer.DiagramLocation = diagramLocation;
explorer.NewDiagramTemplate = "New Diagram";
OpenPreviewRequestedEventArgs newDiagramArgs = null;
explorer.OpenPreviewRequested += (o, e) => newDiagramArgs = e;
diagramIO.Setup(dio => dio.ReadAsync(It.IsAny <FileInfo>()))
.Returns((FileInfo file) => Task.FromResult(new Diagram {
File = file
}));
// Act.
explorer.AddNewDiagramCommand.Execute(new Uri(newDiagramFilePath));
// Assert.
Assert.Single(explorer.PreviewDiagrams);
Assert.Equal(newDiagramFilePath, explorer.PreviewDiagrams.Single().Diagram.File.FullName);
Assert.NotNull(newDiagramArgs);
Assert.Equal(explorer.PreviewDiagrams.Single(), newDiagramArgs.RequestedPreview);
Assert.Equal(explorer.PreviewDiagrams.Single(), explorer.CurrentPreviewDiagram);
diagramIO.Verify(dio => dio.SaveAsync(
It.Is <Diagram>(d => d.File.FullName == newDiagramFilePath),
false));
}
public void Test_RequestOpenPreviewCommand()
{
// Arrange.
var preview = new PreviewDiagramViewModel(new Diagram());
OpenPreviewRequestedEventArgs args = null;
EventHandler <OpenPreviewRequestedEventArgs> handler = (o, e) => args = e;
explorer.OpenPreviewRequested += handler;
// Act.
explorer.RequestOpenPreviewCommand.Execute(preview);
// Assert.
Assert.NotNull(args);
Assert.Equal(preview, args.RequestedPreview);
}