Robot-Test

The application is created to simulate the movement of a toy robot on a square tabletop. The table surface has a 5 units x 5 units dimensions without any obstructions on it.

The movement of the toy robot is controlled by the user using the list of commands below:

• PLACE X,Y,F
• MOVE
• LEFT
• RIGHT
• REPORT
• SHOW

PLACE will put the toy robot on the table surface in the position of (X,Y) and facing (NORTH, SOUTH, EAST or WEST). The origin (0,0) is the SOUTH WEST most corner of the tabletop.

MOVE will move the toy robot one unit forward in the direction it is currently facing.

LEFT and RIGHT will rotate the toy robot 90 degrees in the specified direction without changing the position of the robot.

REPORT will show the X-coordinate, Y-coordinate and the direction of the toy robot is currently facing.

SHOW will print the grid of the tabletop with the the toy robot indicated with an arrowhead to show its position and direction on the grid.

Getting started

1. Download the folder and run 'main.js'.

2. PLACE command will be the first valid command to the toy robot. The placement of the toy robot must be within the grid of the tabletop and the application discards all commands in the sequence until a valid PLACE has been executed.

3. After the first PLACE command is executed, any sequence of commands may be issued, in any order, including another PLACE command. The toy robot must not fall to destruction. Any MOVE command that would result in the robot falling off the table is discarded, however further valid commands can still be entered.

Examples

Example 1

Input:

PLACE 0,0 NORTH
MOVE
REPORT
SHOW

Output:

0,1,NORTH
 --- --- --- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 
|   |   |   |   |   |
^--- --- --- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 

Example 2

Input:

PLACE 5,5 SOUTH
RIGHT
REPORT
SHOW

Output:

5,5,WEST
 --- --- --- --- ---<
|   |   |   |   |   |
 --- --- --- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 

Example 3

Input:

PLACE 3,2 EAST
LEFT
MOVE
MOVE
LEFT
MOVE
RIGHT
REPORT
SHOW

Output:

2,4,NORTH
 --- --- --- --- --- 
|   |   |   |   |   |
 --- ---^--- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 
|   |   |   |   |   |
 --- --- --- --- --- 

Design Decisions

1. SHOW command shows a grid of the tabletop and the toy robot is indicated by an arrowhead, which represents its position and direction the toy robot is facing. This feature is added to let user visualize better on the scenario and the application would serve its purpose more effectively.

2. All commands are now non case-sensitive. User can now has more ways to enter commands thus increasing the usability of the application.

3. An error message is printed whenever invalid command is entered. This notifies the user that an incorrect instruction has been given so that user has better understanding of the situation rather than ignoring the command without any notification.

Acknowledgement

• Test designed by @bauerxcelmedia.

Author

• Robin Ong - robinkjong@hotmail.com