public void Execute_WhenCommandIsExecuted_PreviousPageWillBeShown()
{
var display = Substitute.For<Display>();
var browsable = Substitute.For<Browsable>();
var sut = new PreviousPageCommand(display, browsable);
sut.Execute();
browsable.Received(1).PreviousPage();
display.Received(1).Show(Arg.Any<Page>());
}
public void IsNotExitCommand_GivenCommand_ReturnsTrue()
{
var sut = new PreviousPageCommand(null, null);
Assert.IsTrue(sut.IsNotExitCommand(), "is exit command");
}
