public void GetFerryPathTest()
{
// For example:
//
// F10
// N3
// F7
// R90
// F11
// These instructions would be handled as follows:
//
// F10 would move the ship 10 units east(because the ship starts
// by facing east) to east 10, north 0.
// N3 would move the ship 3 units north to east 10, north 3.
// F7 would move the ship another 7 units east(because the ship is
// still facing east) to east 17, north 3.
// R90 would cause the ship to turn right by 90 degrees and face
// south; it remains at east 17, north 3.
// F11 would move the ship 11 units south to east 17, south 8.
// At the end of these instructions, the ship's Manhattan distance
// (sum of the absolute values of its east/west position and its
// north/south position) from its starting position is 17 + 8 = 25.
var testData = new List <Tuple <IList <string>, FerryMovementDirection, int> >()
{
new Tuple <IList <string>, FerryMovementDirection, int>(
new List <string>()
{
"F10",
"N3",
"F7",
"R90",
"F11"
}, FerryMovementDirection.East, 25)
};
foreach (var testExample in testData)
{
var instructions = FerryHelper.ParseInputLines(testExample.Item1);
var initialState = new FerryState(GridPoint.Origin, testExample.Item2);
var path = FerryHelper.GetFerryPath(instructions, initialState);
var actual = GridPoint.GetManhattanDistance(initialState.Position, path.Last().Position);
Assert.Equal(testExample.Item3, actual);
}
}
public void GetFerryPathWithWaypointTest()
{
// For example, using the same instructions as above:
// F10 moves the ship to the waypoint 10 times(a total of 100
// units east and 10 units north), leaving the ship at east 100,
// north 10.The waypoint stays 10 units east and 1 unit north of
// the ship.
// N3 moves the waypoint 3 units north to 10 units east and 4
// units north of the ship.The ship remains at east 100, north 10.
// F7 moves the ship to the waypoint 7 times(a total of 70 units
// east and 28 units north), leaving the ship at east 170, north
// 38.The waypoint stays 10 units east and 4 units north of the ship.
// R90 rotates the waypoint around the ship clockwise 90 degrees,
// moving it to 4 units east and 10 units south of the ship. The
// ship remains at east 170, north 38.
// F11 moves the ship to the waypoint 11 times(a total of 44 units
// east and 110 units south), leaving the ship at east 214, south
// 72.The waypoint stays 4 units east and 10 units south of the ship.
// After these operations, the ship's Manhattan distance from its
// starting position is 214 + 72 = 286.
var testData = new List <Tuple <IList <string>, GridPoint, int> >()
{
new Tuple <IList <string>, GridPoint, int>(
new List <string>()
{
"F10",
"N3",
"F7",
"R90",
"F11"
}, new GridPoint(10, 1),
286)
};
foreach (var testExample in testData)
{
var instructions = FerryHelper.ParseInputLines(testExample.Item1);
var initialState = new FerryState(GridPoint.Origin, testExample.Item2);
var path = FerryHelper.GetFerryPathWithWaypoint(instructions, initialState);
var actual = GridPoint.GetManhattanDistance(initialState.Position, path.Last().Position);
Assert.Equal(testExample.Item3, actual);
}
}
