public void WhereToNext_Finds_Direction_From_Start()
{
var asciiPathFinder = new ASCIIPathFinder();
var map1 = @"
@A
";
asciiPathFinder.LoadASCIIMap(map1);
asciiPathFinder.GoToStart();
Assert.AreEqual(asciiPathFinder.WhereToNext(), Direction.Right);
var map2 = @"
@
|
";
asciiPathFinder.LoadASCIIMap(map2);
asciiPathFinder.GoToStart();
Assert.AreEqual(asciiPathFinder.WhereToNext(), Direction.Down);
var map3 = @"
+@
";
asciiPathFinder.LoadASCIIMap(map3);
asciiPathFinder.GoToStart();
Assert.AreEqual(asciiPathFinder.WhereToNext(), Direction.Left);
}
public void FoundLetters_Contains_Passed_Letters()
{
var asciiPathFinder = new ASCIIPathFinder();
var map1 = @"
@
|
A--B
|
x--C
";
asciiPathFinder.LoadASCIIMap(map1);
asciiPathFinder.GoToStart();
asciiPathFinder.Go(Direction.Down);
asciiPathFinder.Go(Direction.Down);
Assert.AreEqual(asciiPathFinder.FoundLetters, "A");
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
Assert.AreEqual(asciiPathFinder.FoundLetters, "AB");
asciiPathFinder.Go(Direction.Down);
asciiPathFinder.Go(Direction.Down);
asciiPathFinder.Go(Direction.Left);
Assert.AreEqual(asciiPathFinder.FoundLetters, "ABC");
}
public void Go_Changes_Current_Char_Correctly()
{
var map = @"
B-+
x |
@-A-+
";
var asciiPathFinder = new ASCIIPathFinder();
asciiPathFinder.LoadASCIIMap(map);
asciiPathFinder.GoToStart();
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
Assert.AreEqual(asciiPathFinder.CurrentChar, 'A');
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Up);
asciiPathFinder.Go(Direction.Up);
Assert.AreEqual(asciiPathFinder.CurrentChar, '+');
asciiPathFinder.Go(Direction.Left);
asciiPathFinder.Go(Direction.Left);
Assert.AreEqual(asciiPathFinder.CurrentChar, 'B');
asciiPathFinder.Go(Direction.Down);
Assert.AreEqual(asciiPathFinder.CurrentChar, 'x');
}
public void Look_Finds_Correct_Chars()
{
var map = @"
C@A
B
";
var asciiPathFinder = new ASCIIPathFinder();
asciiPathFinder.LoadASCIIMap(map);
asciiPathFinder.GoToStart();
// Up is out of bounds
Assert.AreEqual(asciiPathFinder.Look(Direction.Up), null);
Assert.AreEqual(asciiPathFinder.Look(Direction.Right), 'A');
Assert.AreEqual(asciiPathFinder.Look(Direction.Down), 'B');
Assert.AreEqual(asciiPathFinder.Look(Direction.Left), 'C');
}
public void Go_Throws_Exception_If_Out_Of_Bounds()
{
var map = @"
@-B
|
+";
var asciiPathFinder = new ASCIIPathFinder();
asciiPathFinder.LoadASCIIMap(map);
asciiPathFinder.GoToStart();
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Down);
asciiPathFinder.Go(Direction.Down);
Assert.ThrowsException <ArgumentException>(() => asciiPathFinder.Go(Direction.Down));
}
public void WhereToNext_Null_If_No_Path()
{
var asciiPathFinder = new ASCIIPathFinder();
var map1 = @"
@
|
B --+
|
x--+
";
asciiPathFinder.LoadASCIIMap(map1);
asciiPathFinder.GoToStart();
asciiPathFinder.Go(Direction.Down);
asciiPathFinder.Go(Direction.Down);
Assert.AreEqual(asciiPathFinder.CurrentChar, 'B');
Assert.AreEqual(asciiPathFinder.WhereToNext(), null);
}
public void WhereToNext_Prefers_Maintaining_Direction()
{
var asciiPathFinder = new ASCIIPathFinder();
var map1 = @"
@
|
B--+
| |
x--+
";
asciiPathFinder.LoadASCIIMap(map1);
asciiPathFinder.GoToStart();
asciiPathFinder.Go(Direction.Down);
asciiPathFinder.Go(Direction.Down);
Assert.AreEqual(asciiPathFinder.CurrentChar, 'B');
Assert.AreEqual(asciiPathFinder.LastMovedInDirection, Direction.Down);
Assert.AreEqual(asciiPathFinder.WhereToNext(), Direction.Down);
}
public void Finds_Start_Of_Path_If_Exists()
{
var map = @"
|
|
-----|
|
|
|
-----@
";
var asciiPathFinder = new ASCIIPathFinder();
asciiPathFinder.LoadASCIIMap(map);
var canFindStart = asciiPathFinder.GoToStart();
Assert.IsTrue(canFindStart);
Assert.AreEqual(asciiPathFinder.CurrentChar, ConstantChars.START);
Assert.AreEqual(asciiPathFinder.CurrentPosition.Item1, 6);
Assert.AreEqual(asciiPathFinder.CurrentPosition.Item2, 28);
}
public void Go_Changes_Position_And_Stores_The_Passed_Path()
{
var map = @"
A---+
| |
@ x-B
";
var asciiPathFinder = new ASCIIPathFinder();
asciiPathFinder.LoadASCIIMap(map);
asciiPathFinder.GoToStart();
asciiPathFinder.Go(Direction.Up);
asciiPathFinder.Go(Direction.Up);
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Down);
asciiPathFinder.Go(Direction.Down);
Assert.AreEqual(asciiPathFinder.CurrentPosition.Item1, 5);
Assert.AreEqual(asciiPathFinder.CurrentPosition.Item2, 30);
asciiPathFinder.Go(Direction.Left);
asciiPathFinder.Go(Direction.Left);
Assert.AreEqual(asciiPathFinder.CurrentPosition.Item1, 5);
Assert.AreEqual(asciiPathFinder.CurrentPosition.Item2, 28);
Assert.AreEqual(asciiPathFinder.PassedPath, "@|A---+|B-x");
}
public void Does_Not_Find_Start_Of_Path_If_Not_Exists()
{
var map = @"
|
|
|
|
|
|
-----x
";
var asciiPathFinder = new ASCIIPathFinder();
asciiPathFinder.LoadASCIIMap(map);
var canFindStart = asciiPathFinder.GoToStart();
Assert.IsFalse(canFindStart);
Assert.AreEqual(asciiPathFinder.CurrentChar, default);
Assert.AreEqual(asciiPathFinder.CurrentPosition.Item1, default);
Assert.AreEqual(asciiPathFinder.CurrentPosition.Item2, default);
}
public void FoundLetters_Ignores_Previously_Found_Letters()
{
var asciiPathFinder = new ASCIIPathFinder();
var map1 = @"
x
@--A--+
| |
+--+
";
asciiPathFinder.LoadASCIIMap(map1);
asciiPathFinder.GoToStart();
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
Assert.AreEqual(asciiPathFinder.FoundLetters, "A");
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Right);
asciiPathFinder.Go(Direction.Down);
asciiPathFinder.Go(Direction.Down);
asciiPathFinder.Go(Direction.Left);
asciiPathFinder.Go(Direction.Left);
asciiPathFinder.Go(Direction.Left);
asciiPathFinder.Go(Direction.Up);
asciiPathFinder.Go(Direction.Up);
asciiPathFinder.Go(Direction.Up);
Assert.AreEqual(asciiPathFinder.FoundLetters, "A");
}