public void GetGoBackCommand_ReturnsNewICommand()
{
MockNavigationManager navigationManager = new MockNavigationManager();
ICommand command = navigationManager.GetGoBackCommand();
Assert.IsNotNull(command);
}
public void GetGoBackCommand_CanExecute_IsTrueIfCanGoBack()
{
MockNavigationManager navigationManager = new MockNavigationManager()
{
CanGoBack = true
};
ICommand command = navigationManager.GetGoBackCommand();
Assert.AreEqual(true, command.CanExecute(null));
}
public void GoBackCommand_Execute_DoesNothingIfCannotGoBack()
{
MockNavigationManager navigationManager = new MockNavigationManager()
{
CanGoBack = false
};
ICommand command = navigationManager.GetGoBackCommand();
command.Execute(null);
CollectionAssert.AreEqual(new string[] { }, (ICollection)navigationManager.MethodCallLog);
}
public void GoBackCommand_Execute_CallsGoBackIfCanGoBack()
{
MockNavigationManager navigationManager = new MockNavigationManager()
{
CanGoBack = true
};
ICommand command = navigationManager.GetGoBackCommand();
command.Execute(null);
CollectionAssert.AreEqual(new string[] { "GoBack()" }, (ICollection)navigationManager.MethodCallLog);
}
public void GetGoBackCommand_CanExecuteChanged_IsCalledWhenCanGoBackChanged()
{
MockNavigationManager navigationManager = new MockNavigationManager();
ICommand command = navigationManager.GetGoBackCommand();
int canExecuteChangedCount = 0;
command.CanExecuteChanged += delegate(object sender, EventArgs e) { canExecuteChangedCount++; };
navigationManager.RaiseCanGoBackChanged();
Assert.AreEqual(1, canExecuteChangedCount);
}