public void ApplyCommandWhenStateInvalidShouldRevertCommand()
{
var command = new MoveCursorCommand(-5);
controller.ApplyCommand(command);
controller.Text.Should().BeEquivalentTo(string.Empty);
controller.CurrentPosition.Should().Be(0);
}
public void ApplyShouldMoveCursorFromDifferentPositions(int startPosition)
{
state.CurrentPosition = startPosition;
command = new MoveCursorCommand(1);
var result = command.Apply(state);
result.Should().BeTrue();
state.CurrentPosition.Should().Be(startPosition + 1);
}
public void ApplyShouldMoveCursorToDifferentDistances(int targetPosition)
{
var oldPosition = state.CurrentPosition;
command = new MoveCursorCommand(targetPosition);
var result = command.Apply(state);
result.Should().BeTrue();
state.CurrentPosition.Should().Be(oldPosition + targetPosition);
}
public void RevertShouldRestoreStateFromDifferentDistances(int targetPosition)
{
command = new MoveCursorCommand(targetPosition);
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);
}
public void RevertShouldRestoreStateFromDifferentPositions(int startPosition)
{
state.CurrentPosition = startPosition;
command = new MoveCursorCommand(1);
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);
}