public void ApplyCommandWhenCommandCantBeAppliedShouldReturnFalse()
{
var command = new DeleteCharCommand();
var result = controller.ApplyCommand(command);
result.Should().BeFalse();
controller.Text.Should().BeEquivalentTo(string.Empty);
controller.CurrentPosition.Should().Be(0);
}
public void ApplyShouldDeleteChar(int position)
{
state.CurrentPosition = position;
command = new DeleteCharCommand();
var oldState = new ControllerState(state);
var result = command.Apply(state);
result.Should().BeTrue();
state.Text.ToString().Should().BeEquivalentTo(oldState.Text.Remove(position, 1).ToString());
state.CurrentPosition.Should().Be(position);
}
public void RevertShouldRestoreState(int position)
{
state.CurrentPosition = position;
command = new DeleteCharCommand();
var oldState = new ControllerState(state);
var applyResult = command.Apply(state);
applyResult.Should().BeTrue();
var result = command.Revert(state);
result.Should().BeTrue();
state.Should().Be(oldState);
}
