{
  "exercise": "robot-simulator",
  "version": "2.0.0",
  "comments": [
    "Some tests have two expectations: one for the position, one for the direction",
    "Optionally, you can also test",
    " - An invalid direction throws an error",
    " - An invalid instruction throws an error",
    " - Default starting position and direction if none are provided"
  ],
  "cases": [
    {
      "description": "A robot is created with a position and a direction",
      "cases": [
        {
          "description": "Robots are created with a position and direction",
          "property": "create",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "north"
          },
          "expected": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "north"
          }
        },
        {
          "description": "Negative positions are allowed",
          "property": "create",
          "robot": {
            "position": {
              "x": -1,
              "y": -1
            },
            "direction": "south"
          },
          "expected": {
            "position": {
              "x": -1,
              "y": -1
            },
            "direction": "south"
          }
        }
      ]
    },
    {
      "description": "rotates the robot's direction 90 degrees clockwise",
      "cases": [
        {
          "description": "does not change the position",
          "property": "turnRight",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "north"
          },
          "expected": {
            "position": {
              "x": 0,
              "y": 0
            }
          }
        },
        {
          "description": "changes the direction from north to east",
          "property": "turnRight",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "north"
          },
          "expected": {
            "direction": "east"
          }
        },
        {
          "description": "changes the direction from east to south",
          "property": "turnRight",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "east"
          },
          "expected": {
            "direction": "south"
          }
        },
        {
          "description": "changes the direction from south to west",
          "property": "turnRight",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "south"
          },
          "expected": {
            "direction": "west"
          }
        },
        {
          "description": "changes the direction from west to north",
          "property": "turnRight",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "west"
          },
          "expected": {
            "direction": "north"
          }
        }
      ]
    },
    {
      "description": "rotates the robot's direction 90 degrees counter-clockwise",
      "cases": [
        {
          "description": "does not change the position",
          "property": "turnLeft",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "north"
          },
          "expected": {
            "position": {
              "x": 0,
              "y": 0
            }
          }
        },
        {
          "description": "changes the direction from north to west",
          "property": "turnLeft",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "north"
          },
          "expected": {
            "direction": "west"
          }
        },
        {
          "description": "changes the direction from west to south",
          "property": "turnLeft",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "west"
          },
          "expected": {
            "direction": "south"
          }
        },
        {
          "description": "changes the direction from south to east",
          "property": "turnLeft",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "south"
          },
          "expected": {
            "direction": "east"
          }
        },
        {
          "description": "changes the direction from east to north",
          "property": "turnLeft",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "east"
          },
          "expected": {
            "direction": "north"
          }
        }
      ]
    },
    {
      "description": "moves the robot forward 1 space in the direction it is pointing",
      "cases": [
        {
          "description": "does not change the direction",
          "property": "advance",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "north"
          },
          "expected": {
            "direction": "north"
          }
        },
        {
          "description": "increases the y coordinate one when facing north",
          "property": "advance",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "north"
          },
          "expected": {
            "position": {
              "x": 0,
              "y": 1
            }
          }
        },
        {
          "description": "decreases the y coordinate by one when facing south",
          "property": "advance",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "south"
          },
          "expected": {
            "position": {
              "x": 0,
              "y": -1
            }
          }
        },
        {
          "description": "increases the x coordinate by one when facing east",
          "property": "advance",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "east"
          },
          "expected": {
            "position": {
              "x": 1,
              "y": 0
            }
          }
        },
        {
          "description": "decreases the x coordinate by one when facing west",
          "property": "advance",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "west"
          },
          "expected": {
            "position": {
              "x": -1,
              "y": 0
            }
          }
        }
      ]
    },
    {
      "description": "Where R = Turn Right, L = Turn Left and A = Advance, the robot can follow a series of instructions and end up with the correct position and direction",
      "cases": [
        {
          "description": "instructions to move west and north",
          "property": "instructions",
          "robot": {
            "position": {
              "x": 0,
              "y": 0
            },
            "direction": "north"
          },
          "instructions": "LAAARALA",
          "expected": {
            "position": {
              "x": -4,
              "y": 1
            },
            "direction": "west"
          }
        },
        {
          "description": "instructions to move west and south",
          "property": "instructions",
          "robot": {
            "position": {
              "x": 2,
              "y": -7
            },
            "direction": "east"
          },
          "instructions": "RRAAAAALA",
          "expected": {
            "position": {
              "x": -3,
              "y": -8
            },
            "direction": "south"
          }
        },
        {
          "description": "instructions to move east and north",
          "property": "instructions",
          "robot": {
            "position": {
              "x": 8,
              "y": 4
            },
            "direction": "south"
          },
          "instructions": "LAAARRRALLLL",
          "expected": {
            "position": {
              "x": 11,
              "y": 5
            },
            "direction": "north"
          }
        }
      ]
    }
  ]
}