public void Test_OpenDiagramCommand_DiagramAlreadyOpenedOnce()
{
// Arrange.
var diagram = new Diagram {
File = testDiagramFile
};
var diagramPreview = new PreviewDiagramViewModel(diagram);
var editor = Mock.Of <IDiagramEditor>(e => e.Diagram == diagram);
var diagramManager = CreateManager(null);
diagramManager.OpenDiagrams.Add(editor);
DiagramOpenedEventArgs openedArgs = null;
diagramManager.DiagramOpened += (o, e) => openedArgs = e;
// Act.
diagramManager.OpenDiagramCommand.Execute(diagramPreview);
// Assert.
Assert.Single(diagramManager.OpenDiagrams);
Assert.Equal(editor, diagramManager.OpenDiagram);
Assert.Null(openedArgs);
}
private void diagramManager_DiagramOpened(object sender, DiagramOpenedEventArgs e)
{
if (!_settings.OpenFiles.Contains(e.Diagram.File, FileComparer))
{
_settings.OpenFiles.Add(e.Diagram.File);
}
}
