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board_test.go
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board_test.go
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package rules
import (
"fmt"
"sort"
"testing"
"github.com/stretchr/testify/require"
)
func TestBoardStateClone(t *testing.T) {
empty := &BoardState{}
require.Equal(t, NewBoardState(0, 0), empty.Clone())
full := NewBoardState(11, 11).
WithTurn(99).
WithFood([]Point{{X: 1, Y: 2, TTL: 10, Value: 100}}).
WithHazards([]Point{{X: 3, Y: 4, TTL: 5, Value: 50}}).
WithSnakes([]Snake{
{
ID: "1",
Body: []Point{{X: 1, Y: 2}},
Health: 99,
EliminatedCause: EliminatedByCollision,
EliminatedOnTurn: 45,
EliminatedBy: "2",
},
}).
WithGameState(map[string]string{"example": "game data"}).
WithPointState(map[Point]int{{X: 1, Y: 1}: 42})
require.Equal(t, full, full.Clone())
}
func TestDev1235(t *testing.T) {
// Small boards should no longer error and only get 1 food when num snakes > 4
state, err := CreateDefaultBoardState(MaxRand, BoardSizeSmall, BoardSizeSmall, []string{
"1", "2", "3", "4", "5", "6", "7", "8",
})
require.NoError(t, err)
require.Len(t, state.Food, 1)
state, err = CreateDefaultBoardState(MaxRand, BoardSizeSmall, BoardSizeSmall, []string{
"1", "2", "3", "4", "5",
})
require.NoError(t, err)
require.Len(t, state.Food, 1)
// Small boards with <= 4 snakes should still get more than just center food
state, err = CreateDefaultBoardState(MaxRand, BoardSizeSmall, BoardSizeSmall, []string{
"1", "2", "3", "4",
})
require.NoError(t, err)
require.Len(t, state.Food, 5)
// Medium boards should still get 9 food
state, err = CreateDefaultBoardState(MaxRand, BoardSizeMedium, BoardSizeMedium, []string{
"1", "2", "3", "4", "5", "6", "7", "8",
})
require.NoError(t, err)
require.Len(t, state.Food, 9)
}
func sortPoints(p []Point) {
sort.Slice(p, func(i, j int) bool {
if p[i].X != p[j].X {
return p[i].X < p[j].X
}
return p[i].Y < p[j].Y
})
}
func TestCreateDefaultBoardState(t *testing.T) {
tests := []struct {
Height int
Width int
IDs []string
ExpectedNumFood int
Err error
}{
{1, 1, []string{"one"}, 0, ErrorNoRoomForSnake},
{1, 2, []string{"one"}, 0, ErrorNoRoomForSnake},
{1, 4, []string{"one"}, 1, nil},
{2, 2, []string{"one"}, 1, nil},
{9, 8, []string{"one"}, 1, nil},
{2, 2, []string{"one", "two"}, 0, ErrorNoRoomForSnake},
{1, 1, []string{"one", "two"}, 2, ErrorNoRoomForSnake},
{1, 2, []string{"one", "two"}, 2, ErrorNoRoomForSnake},
{BoardSizeSmall, BoardSizeSmall, []string{"one", "two"}, 3, nil},
{
BoardSizeSmall,
BoardSizeSmall,
[]string{"1", "2", "3", "4"},
5, // <= 4 snakes on a small board we get more than just center food
nil,
},
{
BoardSizeSmall,
BoardSizeSmall,
[]string{"1", "2", "3", "4", "5"},
1, // for this size and this many snakes, food is only placed in the center
nil,
},
{
BoardSizeSmall,
BoardSizeSmall,
[]string{"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16"},
1, // for this size and this many snakes, food is only placed in the center
nil,
},
{
BoardSizeMedium,
BoardSizeMedium,
[]string{"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16"},
17, // > small boards and we get non-center food
nil,
},
}
for testNum, test := range tests {
t.Logf("test case %d", testNum)
state, err := CreateDefaultBoardState(MaxRand, test.Width, test.Height, test.IDs)
require.Equal(t, test.Err, err)
if err != nil {
require.Nil(t, state)
continue
}
require.NotNil(t, state)
require.Equal(t, test.Width, state.Width)
require.Equal(t, test.Height, state.Height)
require.Equal(t, len(test.IDs), len(state.Snakes))
for i, id := range test.IDs {
require.Equal(t, id, state.Snakes[i].ID)
}
require.Len(t, state.Food, test.ExpectedNumFood, testNum)
require.Len(t, state.Hazards, 0, testNum)
}
}
func TestPlaceSnakesDefault(t *testing.T) {
// Because placement is random, we only test to ensure
// that snake bodies are populated correctly
// Note: because snakes are randomly spawned on even diagonal points, the board can accomodate number of snakes equal to: width*height/2
// Update: because we exclude the center point now, we can accommodate 1 less snake now (width*height/2 - 1)
tests := []struct {
BoardState *BoardState
SnakeIDs []string
Err error
}{
{
&BoardState{
Width: 1,
Height: 1,
},
make([]string, 1),
ErrorNoRoomForSnake, // we avoid placing snakes in the center, so a board size of 1 will error
},
{
&BoardState{
Width: 1,
Height: 1,
},
make([]string, 2),
ErrorNoRoomForSnake,
},
{
&BoardState{
Width: 2,
Height: 1,
},
make([]string, 2),
ErrorNoRoomForSnake,
},
{
&BoardState{
Width: 1,
Height: 2,
},
make([]string, 2),
ErrorNoRoomForSnake,
},
{
&BoardState{
Width: 10,
Height: 5,
},
make([]string, 24),
nil,
},
{
&BoardState{
Width: 5,
Height: 10,
},
make([]string, 24),
nil,
},
{
&BoardState{
Width: 5,
Height: 10,
},
make([]string, 25),
ErrorNoRoomForSnake,
},
{
&BoardState{
Width: 10,
Height: 5,
},
make([]string, 49),
ErrorNoRoomForSnake,
},
{
&BoardState{
Width: 5,
Height: 10,
},
make([]string, 50),
ErrorNoRoomForSnake,
},
{
&BoardState{
Width: 25,
Height: 2,
},
make([]string, 51),
ErrorNoRoomForSnake,
},
{
&BoardState{
Width: BoardSizeSmall,
Height: BoardSizeSmall,
},
make([]string, 1),
nil,
},
{
&BoardState{
Width: BoardSizeSmall,
Height: BoardSizeSmall,
},
make([]string, 8),
nil,
},
{
&BoardState{
Width: BoardSizeMedium,
Height: BoardSizeMedium,
},
make([]string, 8),
nil,
},
{
&BoardState{
Width: BoardSizeMedium,
Height: BoardSizeMedium,
},
make([]string, 17),
ErrorTooManySnakes,
},
{
&BoardState{
Width: BoardSizeLarge,
Height: BoardSizeLarge,
},
make([]string, 8),
nil,
},
{
&BoardState{
Width: BoardSizeLarge,
Height: BoardSizeLarge,
},
make([]string, 17),
ErrorTooManySnakes,
},
}
for _, test := range tests {
t.Run(fmt.Sprint(test.BoardState.Width, test.BoardState.Height, len(test.SnakeIDs)), func(t *testing.T) {
require.Equal(t, test.BoardState.Width*test.BoardState.Height, len(GetUnoccupiedPoints(test.BoardState, true, false)))
err := PlaceSnakesAutomatically(MaxRand, test.BoardState, test.SnakeIDs)
require.Equal(t, test.Err, err, "Snakes: %d", len(test.BoardState.Snakes))
if err == nil {
for i := 0; i < len(test.BoardState.Snakes); i++ {
require.Len(t, test.BoardState.Snakes[i].Body, 3)
for _, point := range test.BoardState.Snakes[i].Body {
require.GreaterOrEqual(t, point.X, 0)
require.GreaterOrEqual(t, point.Y, 0)
require.Less(t, point.X, test.BoardState.Width)
require.Less(t, point.Y, test.BoardState.Height)
}
for j := 0; j < len(test.BoardState.Snakes); j++ {
if j == i {
continue
}
require.NotEqual(t, test.BoardState.Snakes[j].Body[0], test.BoardState.Snakes[i].Body[0], "Snakes placed at same square")
}
// All snakes are expected to be placed on an even square - this is true even of fixed positions for known board sizes
var snakePlacedOnEvenSquare bool = ((test.BoardState.Snakes[i].Body[0].X + test.BoardState.Snakes[i].Body[0].Y) % 2) == 0
require.Equal(t, true, snakePlacedOnEvenSquare)
}
}
})
}
}
func TestPlaceSnakesFixed(t *testing.T) {
snakeIDs := make([]string, 8)
for _, test := range []struct {
label string
rand Rand
expectedSnakeHeads []Point
}{
{
label: "corners before cardinal directions",
rand: MinRand,
expectedSnakeHeads: []Point{
{X: 1, Y: 1},
{X: 1, Y: 9},
{X: 9, Y: 1},
{X: 9, Y: 9},
{X: 1, Y: 5},
{X: 5, Y: 1},
{X: 5, Y: 9},
{X: 9, Y: 5},
},
},
{
label: "cardinal directions before corners",
rand: MaxRand,
expectedSnakeHeads: []Point{
{X: 5, Y: 1},
{X: 5, Y: 9},
{X: 9, Y: 5},
{X: 1, Y: 5},
{X: 1, Y: 9},
{X: 9, Y: 1},
{X: 9, Y: 9},
{X: 1, Y: 1},
},
},
} {
t.Run(test.label, func(t *testing.T) {
boardState := &BoardState{
Width: BoardSizeMedium,
Height: BoardSizeMedium,
}
err := PlaceSnakesAutomatically(test.rand, boardState, snakeIDs)
require.NoError(t, err)
var snakeHeads []Point
for _, snake := range boardState.Snakes {
require.Len(t, snake.Body, 3)
snakeHeads = append(snakeHeads, snake.Body[0])
}
require.Equalf(t, test.expectedSnakeHeads, snakeHeads, "%#v", snakeHeads)
})
}
}
func TestPlaceSnake(t *testing.T) {
// TODO: Should PlaceSnake check for boundaries?
boardState := NewBoardState(BoardSizeSmall, BoardSizeSmall)
require.Empty(t, boardState.Snakes)
_ = PlaceSnake(boardState, "a", []Point{{X: 0, Y: 0}, {X: 1, Y: 0}, {X: 1, Y: 1}})
require.Len(t, boardState.Snakes, 1)
require.Equal(t, Snake{
ID: "a",
Body: []Point{{X: 0, Y: 0}, {X: 1, Y: 0}, {X: 1, Y: 1}},
Health: SnakeMaxHealth,
EliminatedCause: NotEliminated,
EliminatedBy: "",
}, boardState.Snakes[0])
_ = PlaceSnake(boardState, "b", []Point{{X: 0, Y: 2}, {X: 1, Y: 2}, {X: 3, Y: 2}})
require.Len(t, boardState.Snakes, 2)
require.Equal(t, Snake{
ID: "b",
Body: []Point{{X: 0, Y: 2}, {X: 1, Y: 2}, {X: 3, Y: 2}},
Health: SnakeMaxHealth,
EliminatedCause: NotEliminated,
EliminatedBy: "",
}, boardState.Snakes[1])
}
func TestPlaceFood(t *testing.T) {
tests := []struct {
BoardState *BoardState
ExpectedFood int
}{
{
&BoardState{
Width: 1,
Height: 1,
Snakes: make([]Snake, 1),
},
1,
},
{
&BoardState{
Width: 1,
Height: 2,
Snakes: make([]Snake, 2),
},
2,
},
{
&BoardState{
Width: 101,
Height: 202,
Snakes: make([]Snake, 17),
},
17,
},
{
&BoardState{
Width: 10,
Height: 20,
Snakes: make([]Snake, 305),
},
200,
},
{
&BoardState{
Width: BoardSizeSmall,
Height: BoardSizeSmall,
Snakes: []Snake{
{Body: []Point{{X: 5, Y: 1}}},
{Body: []Point{{X: 5, Y: 3}}},
{Body: []Point{{X: 5, Y: 5}}},
},
},
4, // +1 because of fixed spawn locations
},
{
&BoardState{
Width: BoardSizeMedium,
Height: BoardSizeMedium,
Snakes: []Snake{
{Body: []Point{{X: 1, Y: 1}}},
{Body: []Point{{X: 1, Y: 5}}},
{Body: []Point{{X: 1, Y: 9}}},
{Body: []Point{{X: 5, Y: 1}}},
{Body: []Point{{X: 5, Y: 9}}},
{Body: []Point{{X: 9, Y: 1}}},
{Body: []Point{{X: 9, Y: 5}}},
{Body: []Point{{X: 9, Y: 9}}},
},
},
9, // +1 because of fixed spawn locations
},
{
&BoardState{
Width: BoardSizeLarge,
Height: BoardSizeLarge,
Snakes: []Snake{
{Body: []Point{{X: 1, Y: 1}}},
{Body: []Point{{X: 1, Y: 9}}},
{Body: []Point{{X: 1, Y: 17}}},
{Body: []Point{{X: 17, Y: 1}}},
{Body: []Point{{X: 17, Y: 9}}},
{Body: []Point{{X: 17, Y: 17}}},
},
},
7, // +1 because of fixed spawn locations
},
}
for i, test := range tests {
t.Run(fmt.Sprintf("case %d", i), func(t *testing.T) {
require.Len(t, test.BoardState.Food, 0)
err := PlaceFoodAutomatically(MaxRand, test.BoardState)
require.NoError(t, err)
require.Equal(t, test.ExpectedFood, len(test.BoardState.Food))
for _, point := range test.BoardState.Food {
require.GreaterOrEqual(t, point.X, 0)
require.GreaterOrEqual(t, point.Y, 0)
require.Less(t, point.X, test.BoardState.Width)
require.Less(t, point.Y, test.BoardState.Height)
}
})
}
}
func TestPlaceFoodFixed(t *testing.T) {
tests := []struct {
BoardState *BoardState
}{
{
&BoardState{
Width: BoardSizeSmall,
Height: BoardSizeSmall,
Snakes: []Snake{
{Body: []Point{{X: 1, Y: 3}}},
},
},
},
{
&BoardState{
Width: BoardSizeMedium,
Height: BoardSizeMedium,
Snakes: []Snake{
{Body: []Point{{X: 1, Y: 1}}},
{Body: []Point{{X: 1, Y: 5}}},
{Body: []Point{{X: 9, Y: 5}}},
{Body: []Point{{X: 9, Y: 9}}},
},
},
},
{
&BoardState{
Width: BoardSizeLarge,
Height: BoardSizeLarge,
Snakes: []Snake{
{Body: []Point{{X: 1, Y: 1}}},
{Body: []Point{{X: 1, Y: 9}}},
{Body: []Point{{X: 1, Y: 17}}},
{Body: []Point{{X: 9, Y: 1}}},
{Body: []Point{{X: 9, Y: 17}}},
{Body: []Point{{X: 17, Y: 1}}},
{Body: []Point{{X: 17, Y: 9}}},
{Body: []Point{{X: 17, Y: 17}}},
},
},
},
}
for _, test := range tests {
require.Len(t, test.BoardState.Food, 0)
err := PlaceFoodFixed(MaxRand, test.BoardState)
require.NoError(t, err)
require.Equal(t, len(test.BoardState.Snakes)+1, len(test.BoardState.Food))
midPoint := Point{X: (test.BoardState.Width - 1) / 2, Y: (test.BoardState.Height - 1) / 2}
// Make sure every snake has food within 2 moves of it
for _, snake := range test.BoardState.Snakes {
head := snake.Body[0]
bottomLeft := Point{X: head.X - 1, Y: head.Y - 1}
topLeft := Point{X: head.X - 1, Y: head.Y + 1}
bottomRight := Point{X: head.X + 1, Y: head.Y - 1}
topRight := Point{X: head.X + 1, Y: head.Y + 1}
foundFoodInTwoMoves := false
for _, food := range test.BoardState.Food {
if food == bottomLeft || food == topLeft || food == bottomRight || food == topRight {
foundFoodInTwoMoves = true
// Ensure it's not closer to the center than snake
require.True(t, getDistanceBetweenPoints(head, midPoint) <= getDistanceBetweenPoints(food, midPoint))
break
}
}
require.True(t, foundFoodInTwoMoves)
}
// Make sure one food exists in center of board
foundFoodInCenter := false
for _, food := range test.BoardState.Food {
if food == midPoint {
foundFoodInCenter = true
break
}
}
require.True(t, foundFoodInCenter)
}
}
func TestPlaceFoodFixedNoRoom(t *testing.T) {
boardState := &BoardState{
Width: 3,
Height: 3,
Snakes: []Snake{
{Body: []Point{{X: 1, Y: 1}}},
},
Food: []Point{},
}
err := PlaceFoodFixed(MaxRand, boardState)
require.Error(t, err)
}
func TestPlaceFoodFixedNoRoom_Corners(t *testing.T) {
boardState := &BoardState{
Width: 7,
Height: 7,
Snakes: []Snake{
{Body: []Point{{X: 1, Y: 1}}},
{Body: []Point{{X: 1, Y: 5}}},
{Body: []Point{{X: 5, Y: 1}}},
{Body: []Point{{X: 5, Y: 5}}},
},
Food: []Point{},
}
// There are only two possible food spawn locations for each snake,
// so repeat calls to place food should fail after 2 successes
err := PlaceFoodFixed(MaxRand, boardState)
require.NoError(t, err)
boardState.Food = boardState.Food[:len(boardState.Food)-1] // Center food
require.Equal(t, 4, len(boardState.Food))
err = PlaceFoodFixed(MaxRand, boardState)
require.NoError(t, err)
boardState.Food = boardState.Food[:len(boardState.Food)-1] // Center food
require.Equal(t, 8, len(boardState.Food))
// And now there should be no more room.
err = PlaceFoodFixed(MaxRand, boardState)
require.Error(t, err)
expectedFood := []Point{
{X: 0, Y: 2}, {X: 2, Y: 0}, // Snake @ {X: 1, Y: 1}
{X: 0, Y: 4}, {X: 2, Y: 6}, // Snake @ {X: 1, Y: 5}
{X: 4, Y: 0}, {X: 6, Y: 2}, // Snake @ {X: 5, Y: 1}
{X: 4, Y: 6}, {X: 6, Y: 4}, // Snake @ {X: 5, Y: 5}
}
sortPoints(expectedFood)
sortPoints(boardState.Food)
require.Equal(t, expectedFood, boardState.Food)
}
func TestPlaceFoodFixedNoRoom_Cardinal(t *testing.T) {
boardState := &BoardState{
Width: 11,
Height: 11,
Snakes: []Snake{
{Body: []Point{{X: 1, Y: 5}}},
{Body: []Point{{X: 5, Y: 1}}},
{Body: []Point{{X: 5, Y: 9}}},
{Body: []Point{{X: 9, Y: 5}}},
},
Food: []Point{},
}
// There are only two possible spawn locations for each snake,
// so repeat calls to place food should fail after 2 successes
err := PlaceFoodFixed(MaxRand, boardState)
require.NoError(t, err)
boardState.Food = boardState.Food[:len(boardState.Food)-1] // Center food
require.Equal(t, 4, len(boardState.Food))
err = PlaceFoodFixed(MaxRand, boardState)
require.NoError(t, err)
boardState.Food = boardState.Food[:len(boardState.Food)-1] // Center food
require.Equal(t, 8, len(boardState.Food))
// And now there should be no more room.
err = PlaceFoodFixed(MaxRand, boardState)
require.Error(t, err)
expectedFood := []Point{
{X: 0, Y: 4}, {X: 0, Y: 6}, // Snake @ {X: 1, Y: 5}
{X: 4, Y: 0}, {X: 6, Y: 0}, // Snake @ {X: 5, Y: 1}
{X: 4, Y: 10}, {X: 6, Y: 10}, // Snake @ {X: 5, Y: 9}
{X: 10, Y: 4}, {X: 10, Y: 6}, // Snake @ {X: 9, Y: 5}
}
sortPoints(expectedFood)
sortPoints(boardState.Food)
require.Equal(t, expectedFood, boardState.Food)
}
func TestGetDistanceBetweenPoints(t *testing.T) {
tests := []struct {
A Point
B Point
Expected int
}{
{Point{X: 0, Y: 0}, Point{X: 0, Y: 0}, 0},
{Point{X: 0, Y: 0}, Point{X: 1, Y: 0}, 1},
{Point{X: 0, Y: 0}, Point{X: 0, Y: 1}, 1},
{Point{X: 0, Y: 0}, Point{X: 1, Y: 1}, 2},
{Point{X: 0, Y: 0}, Point{X: 4, Y: 4}, 8},
{Point{X: 0, Y: 0}, Point{X: 4, Y: 6}, 10},
{Point{X: 8, Y: 0}, Point{X: 8, Y: 0}, 0},
{Point{X: 8, Y: 0}, Point{X: 8, Y: 8}, 8},
{Point{X: 8, Y: 0}, Point{X: 0, Y: 8}, 16},
}
for _, test := range tests {
require.Equal(t, getDistanceBetweenPoints(test.A, test.B), test.Expected)
require.Equal(t, getDistanceBetweenPoints(test.B, test.A), test.Expected)
}
}
func TestIsSquareBoard(t *testing.T) {
tests := []struct {
Width int
Height int
Expected bool
}{
{1, 1, true},
{0, 0, true},
{0, 45, false},
{45, 1, false},
{7, 7, true},
{11, 11, true},
{19, 19, true},
{7, 11, false},
{11, 19, false},
{19, 7, false},
}
for _, test := range tests {
result := isSquareBoard(&BoardState{Width: test.Width, Height: test.Height})
require.Equal(t, test.Expected, result)
}
}
func TestGetUnoccupiedPoints(t *testing.T) {
tests := []struct {
Board *BoardState
Expected []Point
}{
{
&BoardState{
Height: 1,
Width: 1,
},
[]Point{{X: 0, Y: 0}},
},
{
&BoardState{
Height: 1,
Width: 2,
},
[]Point{{X: 0, Y: 0}, {X: 1, Y: 0}},
},
{
&BoardState{
Height: 1,
Width: 1,
Food: []Point{{X: 0, Y: 0}, {X: 101, Y: 202}, {X: -4, Y: -5}},
},
[]Point{},
},
{
&BoardState{
Height: 2,
Width: 2,
Food: []Point{{X: 0, Y: 0}, {X: 1, Y: 0}},
},
[]Point{{X: 0, Y: 1}, {X: 1, Y: 1}},
},
{
&BoardState{
Height: 2,
Width: 2,
Food: []Point{{X: 0, Y: 0}, {X: 0, Y: 1}, {X: 1, Y: 0}, {X: 1, Y: 1}},
},
[]Point{},
},
{
&BoardState{
Height: 4,
Width: 1,
Snakes: []Snake{
{Body: []Point{{X: 0, Y: 0}}},
},
},
[]Point{{X: 0, Y: 1}, {X: 0, Y: 2}, {X: 0, Y: 3}},
},
{
&BoardState{
Height: 2,
Width: 3,
Snakes: []Snake{
{Body: []Point{{X: 0, Y: 0}, {X: 1, Y: 0}, {X: 1, Y: 1}}},
},
},
[]Point{{X: 0, Y: 1}, {X: 2, Y: 0}, {X: 2, Y: 1}},
},
{
&BoardState{
Height: 2,
Width: 3,
Food: []Point{{X: 0, Y: 0}, {X: 1, Y: 0}, {X: 1, Y: 1}, {X: 2, Y: 0}},
Snakes: []Snake{
{Body: []Point{{X: 0, Y: 0}, {X: 1, Y: 0}, {X: 1, Y: 1}}},
{Body: []Point{{X: 0, Y: 1}}},
},
},
[]Point{{X: 2, Y: 1}},
},
{
&BoardState{
Height: 1,
Width: 1,
Hazards: []Point{{X: 0, Y: 0}},
},
[]Point{},
},
{
&BoardState{
Height: 2,
Width: 2,
Hazards: []Point{{X: 1, Y: 1}},
},
[]Point{{X: 0, Y: 0}, {X: 0, Y: 1}, {X: 1, Y: 0}},
},
{
&BoardState{
Height: 2,
Width: 3,
Food: []Point{{X: 1, Y: 1}, {X: 2, Y: 0}},
Snakes: []Snake{
{Body: []Point{{X: 0, Y: 0}, {X: 1, Y: 0}, {X: 1, Y: 1}}},
{Body: []Point{{X: 0, Y: 1}}},
},
Hazards: []Point{{X: 0, Y: 0}, {X: 1, Y: 0}},
},
[]Point{{X: 2, Y: 1}},
},
}
for _, test := range tests {
unoccupiedPoints := GetUnoccupiedPoints(test.Board, true, true)
require.Equal(t, len(test.Expected), len(unoccupiedPoints))
for i, e := range test.Expected {
require.Equal(t, e, unoccupiedPoints[i])
}
}
}
func TestGetEvenUnoccupiedPoints(t *testing.T) {
tests := []struct {
Board *BoardState
Expected []Point
}{
{
&BoardState{
Height: 1,
Width: 1,
},
[]Point{{X: 0, Y: 0}},
},
{
&BoardState{
Height: 2,
Width: 2,
},
[]Point{{X: 0, Y: 0}, {X: 1, Y: 1}},
},
{
&BoardState{
Height: 1,
Width: 1,
Food: []Point{{X: 0, Y: 0}, {X: 101, Y: 202}, {X: -4, Y: -5}},
},
[]Point{},
},
{
&BoardState{
Height: 2,
Width: 2,
Food: []Point{{X: 0, Y: 0}, {X: 1, Y: 0}},
},
[]Point{{X: 1, Y: 1}},
},
{
&BoardState{
Height: 4,
Width: 4,
Food: []Point{{X: 0, Y: 0}, {X: 0, Y: 2}, {X: 1, Y: 1}, {X: 1, Y: 3}, {X: 2, Y: 0}, {X: 2, Y: 2}, {X: 3, Y: 1}, {X: 3, Y: 3}},
},
[]Point{},
},
{
&BoardState{
Height: 4,
Width: 1,
Snakes: []Snake{
{Body: []Point{{X: 0, Y: 0}}},
},
},
[]Point{{X: 0, Y: 2}},
},
{
&BoardState{
Height: 2,
Width: 3,
Snakes: []Snake{
{Body: []Point{{X: 0, Y: 0}, {X: 1, Y: 0}, {X: 1, Y: 1}}},
},
},
[]Point{{X: 2, Y: 0}},
},
{
&BoardState{
Height: 2,
Width: 3,
Food: []Point{{X: 0, Y: 0}, {X: 1, Y: 0}, {X: 1, Y: 1}, {X: 2, Y: 1}},
Snakes: []Snake{
{Body: []Point{{X: 0, Y: 0}, {X: 1, Y: 0}, {X: 1, Y: 1}}},
{Body: []Point{{X: 0, Y: 1}}},
},
},
[]Point{{X: 2, Y: 0}},
},
}
for i, test := range tests {
t.Run(fmt.Sprintf("case %d", i), func(t *testing.T) {
evenUnoccupiedPoints := GetEvenUnoccupiedPoints(test.Board)
require.Equal(t, len(test.Expected), len(evenUnoccupiedPoints))
for i, e := range test.Expected {
require.Equal(t, e, evenUnoccupiedPoints[i])
}
})
}
}
func TestPlaceFoodRandomly(t *testing.T) {
b := &BoardState{
Height: 1,
Width: 3,
Snakes: []Snake{
{Body: []Point{{X: 1, Y: 0}}},
},
}
// Food should never spawn, no room
err := PlaceFoodRandomly(MaxRand, b, 99)
require.NoError(t, err)
require.Equal(t, len(b.Food), 0)
}
func TestEliminateSnake(t *testing.T) {
s := &Snake{}
EliminateSnake(s, "test-cause", "", 2)
require.Equal(t, "test-cause", s.EliminatedCause)
require.Equal(t, "", s.EliminatedBy)
require.Equal(t, 2, s.EliminatedOnTurn)
}