DEV-1558-healing-pools-map (#94)

* Adding a basic map that adds a few hazards based on fixed coordinates to the map.

* Used wrong board size definitions

maps/healing_pools_test.go

@@ -0,0 +1,58 @@
+package maps_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/BattlesnakeOfficial/rules"
+	"github.com/BattlesnakeOfficial/rules/maps"
+	"github.com/stretchr/testify/require"
+)
+
+func TestHealingPoolsMap(t *testing.T) {
+
+	tests := []struct {
+		boardSize        int
+		expectedHazards  int
+		allowableHazards []rules.Point
+	}{
+		{7, 1, []rules.Point{{X: 3, Y: 3}}},
+		{11, 2, []rules.Point{{X: 3, Y: 3},
+			{X: 7, Y: 7},
+			{X: 3, Y: 7},
+			{X: 7, Y: 3},
+			{X: 3, Y: 5},
+			{X: 7, Y: 5},
+			{X: 5, Y: 7},
+			{X: 5, Y: 3}}},
+		{19, 4, []rules.Point{{X: 5, Y: 5},
+			{X: 13, Y: 13},
+			{X: 5, Y: 13},
+			{X: 13, Y: 5},
+			{X: 5, Y: 10},
+			{X: 13, Y: 10},
+			{X: 10, Y: 13},
+			{X: 10, Y: 5}}},
+	}
+
+	for _, tc := range tests {
+
+		t.Run(fmt.Sprintf("%dx%d", tc.boardSize, tc.boardSize), func(t *testing.T) {
+			m := maps.HealingPoolsMap{}
+			state := rules.NewBoardState(tc.boardSize, tc.boardSize)
+			settings := rules.Settings{}
+
+			// ensure the ring of hazards is added to the board at setup
+			editor := maps.NewBoardStateEditor(state)
+			require.Empty(t, state.Hazards)
+			err := m.SetupBoard(state, settings, editor)
+			require.NoError(t, err)
+			require.NotEmpty(t, state.Hazards)
+			require.Len(t, state.Hazards, tc.expectedHazards)
+
+			for _, p := range state.Hazards {
+				require.Contains(t, tc.allowableHazards, p)
+			}
+		})
+	}
+}