public void CanExecuteChanged_RemoveHandler_HandlerIsNotCalled()
{
SynchronizationContext.SetSynchronizationContext(new TestSynchronizationContext());
var commandExecuted = false;
_canExecuteChangedRaised = false;
var command = new SimpleRelayCommand(() =>
{
// ReSharper disable once AccessToModifiedClosure
Assert.False(commandExecuted);
commandExecuted = true;
});
command.CanExecuteChanged += CommandOnCanExecuteChanged;
command.Execute(null);
Assert.True(commandExecuted);
Assert.True(_canExecuteChangedRaised);
_canExecuteChangedRaised = false;
commandExecuted = false;
command.CanExecuteChanged -= CommandOnCanExecuteChanged;
command.Execute(null);
Assert.True(commandExecuted);
Assert.False(_canExecuteChangedRaised);
}
public void Execute_CanExecuteIsFalse_ActionIsNotExecuted()
{
var commandExecuted = false;
var command = new SimpleRelayCommand(() =>
{
Assert.False(commandExecuted);
commandExecuted = true;
}, () => false);
command.Execute(null);
Assert.False(commandExecuted);
}
public void Execute_Wait_ActionIsExecuted()
{
SynchronizationContext.SetSynchronizationContext(new TestSynchronizationContext());
var commandExecuted = false;
var canExecuteChangedRaised = false;
var command = new SimpleRelayCommand(() =>
{
Assert.False(commandExecuted);
commandExecuted = true;
});
command.CanExecuteChanged += (_, _) =>
{
Assert.False(canExecuteChangedRaised);
canExecuteChangedRaised = true;
};
command.Execute(null);
Assert.True(commandExecuted);
Assert.True(canExecuteChangedRaised);
}