public void ParseTwoRovers()
{
var lines = new[]
{
"10 12",
"5 6 N",
"M",
"7 8 E",
"L"
};
var result = RoverSimInputParser.Parse(lines);
Assert.IsTrue(result.Ok);
Assert.AreEqual((10, 12), (result.MaxX, result.MaxY));
Assert.AreEqual(2, result.RoverSpecs.Length);
var roverSpecA = result.RoverSpecs[0];
var roverSpecB = result.RoverSpecs[1];
Assert.AreEqual(
(5, 6, CompassDirection.North, RoverInstruction.Move),
(roverSpecA.X, roverSpecA.Y, roverSpecA.Facing, roverSpecA.Instructions.Single()));
Assert.AreEqual(
(7, 8, CompassDirection.East, RoverInstruction.TurnLeft),
(roverSpecB.X, roverSpecB.Y, roverSpecB.Facing, roverSpecB.Instructions.Single()));
}
public void ParseSingleRover()
{
var lines = new[]
{
"10 12",
"5 6 N",
"MMLR"
};
var result = RoverSimInputParser.Parse(lines);
Assert.IsTrue(result.Ok);
Assert.AreEqual((10, 12), (result.MaxX, result.MaxY));
Assert.AreEqual(1, result.RoverSpecs.Length);
var roverSpec = result.RoverSpecs[0];
Assert.AreEqual((5, 6, CompassDirection.North), (roverSpec.X, roverSpec.Y, roverSpec.Facing));
Assert.AreEqual(
new[]
{
RoverInstruction.Move,
RoverInstruction.Move,
RoverInstruction.TurnLeft,
RoverInstruction.TurnRight
},
roverSpec.Instructions);
}
public void RejectsBadHeader(string line, string expectedError)
{
var lines = new[]
{
line
};
var result = RoverSimInputParser.Parse(lines);
Assert.IsFalse(result.Ok);
Assert.AreEqual(expectedError, result.ParseError);
}
public void AllCornersAreInBounds(int x, int y)
{
var lines = new[]
{
"10 12",
$"{x} {y} N",
"M"
};
var result = RoverSimInputParser.Parse(lines);
Assert.IsTrue(result.Ok);
}
public void RejectsEvenLineCount()
{
var lines = new[]
{
"5 5",
"1 1 N"
};
var result = RoverSimInputParser.Parse(lines);
Assert.IsFalse(result.Ok);
Assert.AreEqual("Expected odd number of lines", result.ParseError);
}
public void RejectsBadInstruction()
{
var lines = new[]
{
"10 10",
"5 5 N",
"MxLR"
};
var result = RoverSimInputParser.Parse(lines);
Assert.IsFalse(result.Ok);
Assert.AreEqual("Unexpected instruction on line: MxLR", result.ParseError);
}
public void RejectsOutOfBounds(int x, int y)
{
var lines = new[]
{
"10 12",
$"{x} {y} N",
"M"
};
var result = RoverSimInputParser.Parse(lines);
Assert.IsFalse(result.Ok);
Assert.AreEqual($"Rover at {x}, {y} is out of bounds", result.ParseError);
}
static void Main(string[] args)
{
//TODO - read this from file path specified in args?
string[] lines = new[]
{
"5 5",
"1 2 N",
"LMLMLMLMM",
"3 3 E",
"MMRMMRMRRM"
};
var parseResult = RoverSimInputParser.Parse(lines);
if (!parseResult.Ok)
{
Console.Out.WriteLine("Parse error: " + parseResult.ParseError);
Environment.Exit(0);
}
var rovers = ProcessRovers(parseResult);
OutputRovers(rovers);
}