DEV 1283: Arcade maze map (#77)

* add "namcap" map

* adjust hazards and starting food positions

* add food randomly, not on top of hazards

* add exits on the top and bottom

* rename to arcade_maze

* add maps README

* test for ArcadeMazeMap

* adjustments to hazards in arcade_maze

maps/arcade_maze_test.go

@@ -0,0 +1,67 @@
+package maps_test
+
+import (
+	"testing"
+
+	"github.com/BattlesnakeOfficial/rules"
+	"github.com/BattlesnakeOfficial/rules/maps"
+	"github.com/stretchr/testify/require"
+)
+
+func TestArcadeMazeMap(t *testing.T) {
+	tests := []struct {
+		boardWidth      int
+		boardHeight     int
+		expectedError   error
+		expectedHazards []rules.Point
+	}{
+		{
+			boardWidth:      19,
+			boardHeight:     21,
+			expectedError:   nil,
+			expectedHazards: maps.ArcadeMazeHazards,
+		},
+		{
+			boardWidth:      18,
+			boardHeight:     21,
+			expectedError:   rules.RulesetError("This map can only be played on a 19X21 board"),
+			expectedHazards: nil,
+		},
+		{
+			boardWidth:      20,
+			boardHeight:     21,
+			expectedError:   rules.RulesetError("This map can only be played on a 19X21 board"),
+			expectedHazards: nil,
+		},
+		{
+			boardWidth:      19,
+			boardHeight:     20,
+			expectedError:   rules.RulesetError("This map can only be played on a 19X21 board"),
+			expectedHazards: nil,
+		},
+		{
+			boardWidth:      19,
+			boardHeight:     22,
+			expectedError:   rules.RulesetError("This map can only be played on a 19X21 board"),
+			expectedHazards: nil,
+		},
+	}
+	for _, test := range tests {
+		m := maps.ArcadeMazeMap{}
+		boardState := rules.NewBoardState(test.boardWidth, test.boardHeight)
+		settings := rules.Settings{}
+		editor := maps.NewBoardStateEditor(boardState)
+
+		err := m.SetupBoard(boardState, settings, editor)
+		if test.expectedError != nil {
+			require.Equal(t, test.expectedError, err)
+		} else {
+			require.NoError(t, err)
+			require.Equal(t, test.expectedHazards, boardState.Hazards)
+
+			for _, snake := range boardState.Snakes {
+				require.Equal(t, 3, len(snake.Body))
+			}
+		}
+	}
+}