package au.com.seek.domain;


import org.junit.Test;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;

public class DirectionTest {

    @Test
    public void should_return_new_direction_when_do_turn_left() throws Exception {

        assertThat(Direction.NORTH.turnLeft(), is(Direction.WEST));

        assertThat(Direction.WEST.turnLeft(), is(Direction.SOUTH));

        assertThat(Direction.SOUTH.turnLeft(), is(Direction.EAST));

        assertThat(Direction.EAST.turnLeft(), is(Direction.NORTH));
    }

    @Test
    public void should_return_new_direction_when_do_turn_right() throws Exception {

        assertThat(Direction.NORTH.turnRight(), is(Direction.EAST));

        assertThat(Direction.EAST.turnRight(), is(Direction.SOUTH));

        assertThat(Direction.SOUTH.turnRight(), is(Direction.WEST));

        assertThat(Direction.WEST.turnRight(), is(Direction.NORTH));
    }


    @Test
    public void should_return_step_value_on_x_axis() throws Exception {

        assertThat(Direction.NORTH.stepValueOnXAxis(), is(0));

        assertThat(Direction.EAST.stepValueOnXAxis(), is(1));

        assertThat(Direction.SOUTH.stepValueOnXAxis(), is(0));

        assertThat(Direction.WEST.stepValueOnXAxis(), is(-1));
    }

    @Test
    public void should_return_step_value_on_y_axis() throws Exception {

        assertThat(Direction.NORTH.stepValueOnYAxis(), is(1));

        assertThat(Direction.EAST.stepValueOnYAxis(), is(0));

        assertThat(Direction.SOUTH.stepValueOnYAxis(), is(-1));

        assertThat(Direction.WEST.stepValueOnYAxis(), is(0));
    }

    @Test
    public void should_return_direction_string_as_enum() throws Exception {

        assertThat(Direction.NORTH.toString(), equalTo("NORTH"));

        assertThat(Direction.WEST.toString(), equalTo("WEST"));

        assertThat(Direction.SOUTH.toString(), equalTo("SOUTH"));

        assertThat(Direction.EAST.toString(), equalTo("EAST"));
    }

    @Test
    public void should_return_all_the_values_of_direction() throws Exception {
        Direction[] directions = {Direction.NORTH, Direction.EAST, Direction.SOUTH, Direction.WEST};
        assertThat(Direction.values(), equalTo(directions));
    }

    @Test
    public void test_value_of() throws Exception {
        Direction east = Direction.valueOf("EAST");
        assertThat(east, is(Direction.EAST));
    }
}