[rust] Robot Simulator

1 files changed, 126 insertions, 0 deletions

diff --git a/rust/robot-simulator/tests/robot-simulator.rs b/rust/robot-simulator/tests/robot-simulator.rs
new file mode 100644
index 0000000..14235e9
--- /dev/null
+++ b/rust/robot-simulator/tests/robot-simulator.rs
@@ -0,0 +1,126 @@
+use robot_simulator::*;
+
+#[test]
+fn robots_are_created_with_position_and_direction() {
+    let robot = Robot::new(0, 0, Direction::North);
+    assert_eq!((0, 0), robot.position());
+    assert_eq!(&Direction::North, robot.direction());
+}
+
+#[test]
+fn positions_can_be_negative() {
+    let robot = Robot::new(-1, -1, Direction::South);
+    assert_eq!((-1, -1), robot.position());
+    assert_eq!(&Direction::South, robot.direction());
+}
+
+#[test]
+fn turning_right_does_not_change_position() {
+    let robot = Robot::new(0, 0, Direction::North).turn_right();
+    assert_eq!((0, 0), robot.position());
+}
+
+#[test]
+fn turning_right_from_north_points_the_robot_east() {
+    let robot = Robot::new(0, 0, Direction::North).turn_right();
+    assert_eq!(&Direction::East, robot.direction());
+}
+
+#[test]
+fn turning_right_from_east_points_the_robot_south() {
+    let robot = Robot::new(0, 0, Direction::East).turn_right();
+    assert_eq!(&Direction::South, robot.direction());
+}
+
+#[test]
+fn turning_right_from_south_points_the_robot_west() {
+    let robot = Robot::new(0, 0, Direction::South).turn_right();
+    assert_eq!(&Direction::West, robot.direction());
+}
+
+#[test]
+fn turning_right_from_west_points_the_robot_north() {
+    let robot = Robot::new(0, 0, Direction::West).turn_right();
+    assert_eq!(&Direction::North, robot.direction());
+}
+
+#[test]
+fn turning_left_does_not_change_position() {
+    let robot = Robot::new(0, 0, Direction::North).turn_left();
+    assert_eq!((0, 0), robot.position());
+}
+
+#[test]
+fn turning_left_from_north_points_the_robot_west() {
+    let robot = Robot::new(0, 0, Direction::North).turn_left();
+    assert_eq!(&Direction::West, robot.direction());
+}
+
+#[test]
+fn turning_left_from_west_points_the_robot_south() {
+    let robot = Robot::new(0, 0, Direction::West).turn_left();
+    assert_eq!(&Direction::South, robot.direction());
+}
+
+#[test]
+fn turning_left_from_south_points_the_robot_east() {
+    let robot = Robot::new(0, 0, Direction::South).turn_left();
+    assert_eq!(&Direction::East, robot.direction());
+}
+
+#[test]
+fn turning_left_from_east_points_the_robot_north() {
+    let robot = Robot::new(0, 0, Direction::East).turn_left();
+    assert_eq!(&Direction::North, robot.direction());
+}
+
+#[test]
+fn advance_does_not_change_the_direction() {
+    let robot = Robot::new(0, 0, Direction::North).advance();
+    assert_eq!(&Direction::North, robot.direction());
+}
+
+#[test]
+fn advance_increases_the_y_coordinate_by_one_when_facing_north() {
+    let robot = Robot::new(0, 0, Direction::North).advance();
+    assert_eq!((0, 1), robot.position());
+}
+
+#[test]
+fn advance_decreases_the_y_coordinate_by_one_when_facing_south() {
+    let robot = Robot::new(0, 0, Direction::South).advance();
+    assert_eq!((0, -1), robot.position());
+}
+
+#[test]
+fn advance_increases_the_x_coordinate_by_one_when_facing_east() {
+    let robot = Robot::new(0, 0, Direction::East).advance();
+    assert_eq!((1, 0), robot.position());
+}
+
+#[test]
+fn advance_decreases_the_x_coordinate_by_one_when_facing_west() {
+    let robot = Robot::new(0, 0, Direction::West).advance();
+    assert_eq!((-1, 0), robot.position());
+}
+
+#[test]
+fn follow_instructions_to_move_west_and_north() {
+    let robot = Robot::new(0, 0, Direction::North).instructions("LAAARALA");
+    assert_eq!((-4, 1), robot.position());
+    assert_eq!(&Direction::West, robot.direction());
+}
+
+#[test]
+fn follow_instructions_to_move_west_and_south() {
+    let robot = Robot::new(2, -7, Direction::East).instructions("RRAAAAALA");
+    assert_eq!((-3, -8), robot.position());
+    assert_eq!(&Direction::South, robot.direction());
+}
+
+#[test]
+fn follow_instructions_to_move_east_and_north() {
+    let robot = Robot::new(8, 4, Direction::South).instructions("LAAARRRALLLL");
+    assert_eq!((11, 5), robot.position());
+    assert_eq!(&Direction::North, robot.direction());
+}