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standard_test.go
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package rules
import (
"errors"
"math"
"math/rand"
"testing"
"github.com/stretchr/testify/require"
)
func TestStandardRulesetInterface(t *testing.T) {
var _ Ruleset = (*StandardRuleset)(nil)
}
func TestSanity(t *testing.T) {
r := StandardRuleset{}
state, err := r.CreateInitialBoardState(0, 0, []string{})
require.NoError(t, err)
require.NotNil(t, state)
require.Equal(t, int32(0), state.Width)
require.Equal(t, int32(0), state.Height)
require.Len(t, state.Food, 0)
require.Len(t, state.Snakes, 0)
next, err := r.CreateNextBoardState(
&BoardState{},
[]SnakeMove{},
)
require.NoError(t, err)
require.NotNil(t, next)
require.Equal(t, int32(0), state.Width)
require.Equal(t, int32(0), state.Height)
require.Len(t, state.Snakes, 0)
}
func TestCreateInitialBoardState(t *testing.T) {
tests := []struct {
Height int32
Width int32
IDs []string
ExpectedNumFood int
Err error
}{
{1, 1, []string{"one"}, 0, nil},
{1, 2, []string{"one"}, 1, nil},
{9, 8, []string{"one"}, 1, nil},
{2, 2, []string{"one", "two"}, 2, nil},
{2, 2, []string{"one", "two"}, 2, nil},
{1, 1, []string{"one", "two"}, 2, errors.New("not enough space to place snake")},
{1, 2, []string{"one", "two"}, 2, errors.New("not enough space to place snake")},
}
r := StandardRuleset{}
for _, test := range tests {
state, err := r.CreateInitialBoardState(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)
}
}
func TestPlaceSnakes(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
tests := []struct {
BoardState *BoardState
Err error
}{
{
&BoardState{
Width: 1,
Height: 1,
Snakes: make([]Snake, 1),
},
nil,
},
{
&BoardState{
Width: 1,
Height: 1,
Snakes: make([]Snake, 2),
},
errors.New("not enough space to place snake"),
},
{
&BoardState{
Width: 2,
Height: 1,
Snakes: make([]Snake, 2),
},
errors.New("not enough space to place snake"),
},
{
&BoardState{
Width: 1,
Height: 2,
Snakes: make([]Snake, 2),
},
errors.New("not enough space to place snake"),
},
{
&BoardState{
Width: 10,
Height: 5,
Snakes: make([]Snake, 24),
},
nil,
},
{
&BoardState{
Width: 5,
Height: 10,
Snakes: make([]Snake, 25),
},
nil,
},
{
&BoardState{
Width: 10,
Height: 5,
Snakes: make([]Snake, 49),
},
errors.New("not enough space to place snake"),
},
{
&BoardState{
Width: 5,
Height: 10,
Snakes: make([]Snake, 50),
},
errors.New("not enough space to place snake"),
},
{
&BoardState{
Width: 25,
Height: 2,
Snakes: make([]Snake, 51),
},
errors.New("not enough space to place snake"),
},
{
&BoardState{
Width: BoardSizeSmall,
Height: BoardSizeSmall,
Snakes: make([]Snake, 1),
},
nil,
},
{
&BoardState{
Width: BoardSizeSmall,
Height: BoardSizeSmall,
Snakes: make([]Snake, 8),
},
nil,
},
{
&BoardState{
Width: BoardSizeSmall,
Height: BoardSizeSmall,
Snakes: make([]Snake, 9),
},
errors.New("too many snakes for fixed start positions"),
},
{
&BoardState{
Width: BoardSizeMedium,
Height: BoardSizeMedium,
Snakes: make([]Snake, 8),
},
nil,
},
{
&BoardState{
Width: BoardSizeMedium,
Height: BoardSizeMedium,
Snakes: make([]Snake, 9),
},
errors.New("too many snakes for fixed start positions"),
},
{
&BoardState{
Width: BoardSizeLarge,
Height: BoardSizeLarge,
Snakes: make([]Snake, 8),
},
nil,
},
{
&BoardState{
Width: BoardSizeLarge,
Height: BoardSizeLarge,
Snakes: make([]Snake, 9),
},
errors.New("too many snakes for fixed start positions"),
},
}
r := StandardRuleset{}
for _, test := range tests {
require.Equal(t, test.BoardState.Width*test.BoardState.Height, int32(len(r.getUnoccupiedPoints(test.BoardState))))
err := r.placeSnakes(test.BoardState)
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, int32(0))
require.GreaterOrEqual(t, point.Y, int32(0))
require.Less(t, point.X, test.BoardState.Width)
require.Less(t, point.Y, test.BoardState.Height)
}
// 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 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,
},
}
r := StandardRuleset{}
for _, test := range tests {
require.Len(t, test.BoardState.Food, 0)
err := r.placeFood(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, int32(0))
require.GreaterOrEqual(t, point.Y, int32(0))
require.Less(t, point.X, test.BoardState.Width)
require.Less(t, point.Y, test.BoardState.Height)
}
}
}
func TestCreateNextBoardState(t *testing.T) {
tests := []struct {
prevState *BoardState
moves []SnakeMove
expectedError error
expectedState *BoardState
}{
{
&BoardState{
Width: 10,
Height: 10,
Snakes: []Snake{
{
ID: "one",
Body: []Point{{1, 1}, {1, 2}},
Health: 100,
},
{
ID: "two",
Body: []Point{{3, 4}, {3, 3}},
Health: 100,
},
},
Food: []Point{{0, 0}, {1, 0}},
},
[]SnakeMove{},
errors.New("not enough snake moves"),
nil,
},
{
&BoardState{
Width: 10,
Height: 10,
Snakes: []Snake{
{
ID: "one",
Body: []Point{{1, 1}, {1, 2}},
Health: 100,
},
{
ID: "two",
Body: []Point{},
Health: 100,
},
},
Food: []Point{{0, 0}, {1, 0}},
},
[]SnakeMove{
{ID: "one", Move: MoveUp},
{ID: "two", Move: MoveDown},
},
errors.New("found snake with zero size body"),
nil,
},
{
&BoardState{
Width: 10,
Height: 10,
Snakes: []Snake{
{
ID: "one",
Body: []Point{{1, 1}, {1, 2}},
Health: 100,
},
{
ID: "two",
Body: []Point{{3, 4}, {3, 3}},
Health: 100,
},
},
Food: []Point{{0, 0}, {1, 0}},
},
[]SnakeMove{
{ID: "one", Move: MoveUp},
{ID: "two", Move: MoveDown},
},
nil,
&BoardState{
Width: 10,
Height: 10,
Snakes: []Snake{
{
ID: "one",
Body: []Point{{1, 0}, {1, 1}, {1, 1}},
Health: 100,
},
{
ID: "two",
Body: []Point{{3, 5}, {3, 4}},
Health: 99,
},
},
Food: []Point{{0, 0}},
},
},
}
r := StandardRuleset{}
for _, test := range tests {
nextState, err := r.CreateNextBoardState(test.prevState, test.moves)
require.Equal(t, err, test.expectedError)
require.Equal(t, nextState, test.expectedState)
}
}
func TestMoveSnakes(t *testing.T) {
b := &BoardState{
Snakes: []Snake{
{
ID: "one",
Body: []Point{{10, 110}, {11, 110}},
Health: 111111,
},
{
ID: "two",
Body: []Point{{23, 220}, {22, 220}, {21, 220}, {20, 220}},
Health: 222222,
},
{
ID: "three",
Body: []Point{{0, 0}},
Health: 1,
EliminatedCause: EliminatedByOutOfBounds,
},
},
}
tests := []struct {
MoveOne string
ExpectedOne []Point
MoveTwo string
ExpectedTwo []Point
MoveThree string
ExpectedThree []Point
}{
{
MoveUp, []Point{{10, 109}, {10, 110}},
MoveDown, []Point{{23, 221}, {23, 220}, {22, 220}, {21, 220}},
MoveUp, []Point{{0, 0}},
},
{
MoveRight, []Point{{11, 109}, {10, 109}},
MoveLeft, []Point{{22, 221}, {23, 221}, {23, 220}, {22, 220}},
MoveUp, []Point{{0, 0}},
},
{
MoveRight, []Point{{12, 109}, {11, 109}},
MoveLeft, []Point{{21, 221}, {22, 221}, {23, 221}, {23, 220}},
MoveUp, []Point{{0, 0}},
},
{
MoveRight, []Point{{13, 109}, {12, 109}},
MoveLeft, []Point{{20, 221}, {21, 221}, {22, 221}, {23, 221}},
MoveUp, []Point{{0, 0}},
},
{
MoveUp, []Point{{13, 108}, {13, 109}},
MoveDown, []Point{{20, 222}, {20, 221}, {21, 221}, {22, 221}},
MoveUp, []Point{{0, 0}},
},
}
r := StandardRuleset{}
for _, test := range tests {
moves := []SnakeMove{
{ID: "one", Move: test.MoveOne},
{ID: "two", Move: test.MoveTwo},
{ID: "three", Move: test.MoveThree},
}
err := r.moveSnakes(b, moves)
require.NoError(t, err)
require.Len(t, b.Snakes, 3)
require.Equal(t, int32(111111), b.Snakes[0].Health)
require.Equal(t, int32(222222), b.Snakes[1].Health)
require.Equal(t, int32(1), b.Snakes[2].Health)
require.Len(t, b.Snakes[0].Body, 2)
require.Len(t, b.Snakes[1].Body, 4)
require.Len(t, b.Snakes[2].Body, 1)
require.Equal(t, len(b.Snakes[0].Body), len(test.ExpectedOne))
for i, e := range test.ExpectedOne {
require.Equal(t, e, b.Snakes[0].Body[i])
}
require.Equal(t, len(b.Snakes[1].Body), len(test.ExpectedTwo))
for i, e := range test.ExpectedTwo {
require.Equal(t, e, b.Snakes[1].Body[i])
}
require.Equal(t, len(b.Snakes[2].Body), len(test.ExpectedThree))
for i, e := range test.ExpectedThree {
require.Equal(t, e, b.Snakes[2].Body[i])
}
}
}
func TestMoveSnakesWrongID(t *testing.T) {
b := &BoardState{
Snakes: []Snake{
{
ID: "one",
Body: []Point{{1, 1}},
},
},
}
moves := []SnakeMove{
{
ID: "not found",
Move: MoveUp,
},
}
r := StandardRuleset{}
err := r.moveSnakes(b, moves)
require.Equal(t, err, errors.New("snake not found for move"))
}
func TestMoveSnakesNotEnoughMoves(t *testing.T) {
b := &BoardState{
Snakes: []Snake{
{
ID: "one",
Body: []Point{{1, 1}},
},
{
ID: "two",
Body: []Point{{2, 2}},
},
},
}
moves := []SnakeMove{
{
ID: "two",
Move: MoveUp,
},
}
r := StandardRuleset{}
err := r.moveSnakes(b, moves)
require.Equal(t, err, errors.New("not enough snake moves"))
}
func TestMoveSnakesTooManyMoves(t *testing.T) {
b := &BoardState{
Snakes: []Snake{
{
ID: "one",
Body: []Point{{1, 1}},
},
},
}
moves := []SnakeMove{
{
ID: "one",
Move: MoveUp,
},
{
ID: "two",
Move: MoveUp,
},
}
r := StandardRuleset{}
err := r.moveSnakes(b, moves)
require.Equal(t, err, errors.New("too many snake moves"))
}
func TestIsKnownBoardSize(t *testing.T) {
tests := []struct {
Width int32
Height int32
Expected bool
}{
{1, 1, false},
{0, 0, false},
{0, 45, false},
{45, 1, false},
{7, 7, true},
{11, 11, true},
{19, 19, true},
{7, 11, false},
{11, 19, false},
{19, 7, false},
}
r := StandardRuleset{}
for _, test := range tests {
result := r.isKnownBoardSize(&BoardState{Width: test.Width, Height: test.Height})
require.Equal(t, test.Expected, result)
}
}
func TestMoveSnakesDefault(t *testing.T) {
tests := []struct {
Body []Point
Move string
Expected []Point
}{
{
Body: []Point{{0, 0}},
Move: "invalid",
Expected: []Point{{0, -1}},
},
{
Body: []Point{{5, 5}, {5, 5}},
Move: "",
Expected: []Point{{5, 4}, {5, 5}},
},
{
Body: []Point{{5, 5}, {5, 4}},
Expected: []Point{{5, 6}, {5, 5}},
},
{
Body: []Point{{5, 4}, {5, 5}},
Expected: []Point{{5, 3}, {5, 4}},
},
{
Body: []Point{{5, 4}, {5, 5}},
Expected: []Point{{5, 3}, {5, 4}},
},
{
Body: []Point{{4, 5}, {5, 5}},
Expected: []Point{{3, 5}, {4, 5}},
},
{
Body: []Point{{5, 5}, {4, 5}},
Expected: []Point{{6, 5}, {5, 5}},
},
}
r := StandardRuleset{}
for _, test := range tests {
b := &BoardState{
Snakes: []Snake{
{ID: "one", Body: test.Body},
},
}
moves := []SnakeMove{{ID: "one", Move: test.Move}}
err := r.moveSnakes(b, moves)
require.NoError(t, err)
require.Len(t, b.Snakes, 1)
require.Equal(t, len(test.Body), len(b.Snakes[0].Body))
require.Equal(t, len(test.Expected), len(b.Snakes[0].Body))
for i, e := range test.Expected {
require.Equal(t, e, b.Snakes[0].Body[i])
}
}
}
func TestReduceSnakeHealth(t *testing.T) {
b := &BoardState{
Snakes: []Snake{
{
Body: []Point{{0, 0}, {0, 1}},
Health: 99,
},
{
Body: []Point{{5, 8}, {6, 8}, {7, 8}},
Health: 2,
},
{
Body: []Point{{0, 0}, {0, 1}},
Health: 50,
EliminatedCause: EliminatedByCollision,
},
},
}
r := StandardRuleset{}
err := r.reduceSnakeHealth(b)
require.NoError(t, err)
require.Equal(t, b.Snakes[0].Health, int32(98))
require.Equal(t, b.Snakes[1].Health, int32(1))
require.Equal(t, b.Snakes[2].Health, int32(50))
err = r.reduceSnakeHealth(b)
require.NoError(t, err)
require.Equal(t, b.Snakes[0].Health, int32(97))
require.Equal(t, b.Snakes[1].Health, int32(0))
require.Equal(t, b.Snakes[2].Health, int32(50))
err = r.reduceSnakeHealth(b)
require.NoError(t, err)
require.Equal(t, b.Snakes[0].Health, int32(96))
require.Equal(t, b.Snakes[1].Health, int32(-1))
require.Equal(t, b.Snakes[2].Health, int32(50))
err = r.reduceSnakeHealth(b)
require.NoError(t, err)
require.Equal(t, b.Snakes[0].Health, int32(95))
require.Equal(t, b.Snakes[1].Health, int32(-2))
require.Equal(t, b.Snakes[2].Health, int32(50))
}
func TestSnakeHasStarved(t *testing.T) {
tests := []struct {
Health int32
Expected bool
}{
{Health: math.MinInt32, Expected: true},
{Health: -10, Expected: true},
{Health: -2, Expected: true},
{Health: -1, Expected: true},
{Health: 0, Expected: true},
{Health: 1, Expected: false},
{Health: 2, Expected: false},
{Health: 10, Expected: false},
{Health: math.MaxInt32, Expected: false},
}
r := StandardRuleset{}
for _, test := range tests {
s := &Snake{Health: test.Health}
require.Equal(t, test.Expected, r.snakeHasStarved(s), "Health: %+v", test.Health)
}
}
func TestSnakeIsOutOfBounds(t *testing.T) {
boardWidth := int32(10)
boardHeight := int32(100)
tests := []struct {
Point Point
Expected bool
}{
{Point{X: math.MinInt32, Y: math.MinInt32}, true},
{Point{X: math.MinInt32, Y: 0}, true},
{Point{X: 0, Y: math.MinInt32}, true},
{Point{X: -1, Y: -1}, true},
{Point{X: -1, Y: 0}, true},
{Point{X: 0, Y: -1}, true},
{Point{X: 0, Y: 0}, false},
{Point{X: 1, Y: 0}, false},
{Point{X: 0, Y: 1}, false},
{Point{X: 1, Y: 1}, false},
{Point{X: 9, Y: 9}, false},
{Point{X: 9, Y: 10}, false},
{Point{X: 9, Y: 11}, false},
{Point{X: 10, Y: 9}, true},
{Point{X: 10, Y: 10}, true},
{Point{X: 10, Y: 11}, true},
{Point{X: 11, Y: 9}, true},
{Point{X: 11, Y: 10}, true},
{Point{X: 11, Y: 11}, true},
{Point{X: math.MaxInt32, Y: 11}, true},
{Point{X: 9, Y: 99}, false},
{Point{X: 9, Y: 100}, true},
{Point{X: 9, Y: 101}, true},
{Point{X: 9, Y: math.MaxInt32}, true},
{Point{X: math.MaxInt32, Y: math.MaxInt32}, true},
}
r := StandardRuleset{}
for _, test := range tests {
// Test with point as head
s := Snake{Body: []Point{test.Point}}
require.Equal(t, test.Expected, r.snakeIsOutOfBounds(&s, boardWidth, boardHeight), "Head%+v", test.Point)
// Test with point as body
s = Snake{Body: []Point{Point{0, 0}, Point{0, 0}, test.Point}}
require.Equal(t, test.Expected, r.snakeIsOutOfBounds(&s, boardWidth, boardHeight), "Body%+v", test.Point)
}
}
func TestSnakeHasBodyCollidedSelf(t *testing.T) {
tests := []struct {
Body []Point
Expected bool
}{
{[]Point{{1, 1}}, false},
// Self stacks should self collide
// (we rely on snakes moving before we check self-collision on turn one)
{[]Point{{2, 2}, {2, 2}}, true},
{[]Point{{3, 3}, {3, 3}, {3, 3}}, true},
{[]Point{{5, 5}, {5, 5}, {5, 5}, {5, 5}, {5, 5}}, true},
// Non-collision cases
{[]Point{{0, 0}, {1, 0}, {1, 0}}, false},
{[]Point{{0, 0}, {1, 0}, {2, 0}}, false},
{[]Point{{0, 0}, {1, 0}, {2, 0}, {2, 0}, {2, 0}}, false},
{[]Point{{0, 0}, {1, 0}, {2, 0}, {3, 0}, {4, 0}}, false},
{[]Point{{0, 0}, {0, 1}, {0, 2}}, false},
{[]Point{{0, 0}, {0, 1}, {0, 2}, {0, 2}, {0, 2}}, false},
{[]Point{{0, 0}, {0, 1}, {0, 2}, {0, 3}, {0, 4}}, false},
// Collision cases
{[]Point{{0, 0}, {1, 0}, {0, 0}}, true},
{[]Point{{0, 0}, {0, 0}, {1, 0}}, true},
{[]Point{{0, 0}, {1, 0}, {1, 1}, {0, 1}, {0, 0}}, true},
{[]Point{{4, 4}, {3, 4}, {3, 3}, {4, 4}, {4, 4}}, true},
{[]Point{{3, 3}, {3, 4}, {3, 3}, {4, 4}, {4, 5}}, true},
}
r := StandardRuleset{}
for _, test := range tests {
s := Snake{Body: test.Body}
require.Equal(t, test.Expected, r.snakeHasBodyCollided(&s, &s), "Body%q", s.Body)
}
}
func TestSnakeHasBodyCollidedOther(t *testing.T) {
tests := []struct {
SnakeBody []Point
OtherBody []Point
Expected bool
}{
{
// Just heads
[]Point{{0, 0}},
[]Point{{1, 1}},
false,
},
{
// Head-to-heads are not considered in body collisions
[]Point{{0, 0}},
[]Point{{0, 0}},
false,
},
{
// Stacked bodies
[]Point{{0, 0}},
[]Point{{0, 0}, {0, 0}},
true,
},
{
// Separate stacked bodies
[]Point{{0, 0}, {0, 0}, {0, 0}},
[]Point{{1, 1}, {1, 1}, {1, 1}},
false,
},
{
// Stacked bodies, separated heads
[]Point{{0, 0}, {1, 0}, {1, 0}},
[]Point{{2, 0}, {1, 0}, {1, 0}},
false,
},
{
// Mid-snake collision
[]Point{{1, 1}},
[]Point{{0, 1}, {1, 1}, {2, 1}},
true,
},
}
r := StandardRuleset{}
for _, test := range tests {
s := &Snake{Body: test.SnakeBody}
o := &Snake{Body: test.OtherBody}
require.Equal(t, test.Expected, r.snakeHasBodyCollided(s, o), "Snake%q Other%q", s.Body, o.Body)
}
}
func TestSnakeHasLostHeadToHead(t *testing.T) {
tests := []struct {
SnakeBody []Point
OtherBody []Point
Expected bool
ExpectedOpposite bool
}{
{
// Just heads
[]Point{{0, 0}},
[]Point{{1, 1}},
false, false,
},
{
// Just heads colliding
[]Point{{0, 0}},
[]Point{{0, 0}},
true, true,
},
{
// One snake larger
[]Point{{0, 0}, {1, 0}, {2, 0}},
[]Point{{0, 0}},
false, true,
},
{
// Other snake equal
[]Point{{0, 0}, {1, 0}, {2, 0}},
[]Point{{0, 0}, {0, 1}, {0, 2}},
true, true,
},
{
// Other snake longer
[]Point{{0, 0}, {1, 0}, {2, 0}},
[]Point{{0, 0}, {0, 1}, {0, 2}, {0, 3}},
true, false,
},
{
// Body collision
[]Point{{0, 1}, {1, 1}, {2, 1}},
[]Point{{0, 0}, {0, 1}, {0, 2}, {0, 3}},
false, false,
},
{
// Separate stacked bodies, head collision
[]Point{{3, 10}, {2, 10}, {2, 10}},
[]Point{{3, 10}, {4, 10}, {4, 10}},
true, true,
},
{
// Separate stacked bodies, head collision
[]Point{{10, 3}, {10, 2}, {10, 1}, {10, 0}},
[]Point{{10, 3}, {10, 4}, {10, 5}},
false, true,
},
}
r := StandardRuleset{}
for _, test := range tests {
s := Snake{Body: test.SnakeBody}
o := Snake{Body: test.OtherBody}
require.Equal(t, test.Expected, r.snakeHasLostHeadToHead(&s, &o), "Snake%q Other%q", s.Body, o.Body)
require.Equal(t, test.ExpectedOpposite, r.snakeHasLostHeadToHead(&o, &s), "Snake%q Other%q", s.Body, o.Body)
}
}
func TestMaybeEliminateSnakes(t *testing.T) {
tests := []struct {
Name string
Snakes []Snake
ExpectedEliminatedCauses []string
ExpectedEliminatedBy []string
Err error
}{
{
"Empty",
[]Snake{},
[]string{},
[]string{},
nil,
},
{
"Zero Snake",
[]Snake{
Snake{},
},
[]string{NotEliminated},
[]string{""},
errors.New("snake is length zero"),
},
{
"Single Starvation",
[]Snake{
Snake{ID: "1", Body: []Point{{1, 1}}},
},
[]string{EliminatedByStarvation},
[]string{""},
nil,
},
{
"Not Eliminated",
[]Snake{
Snake{ID: "1", Health: 1, Body: []Point{{1, 1}}},
},
[]string{NotEliminated},
[]string{""},
nil,
},
{
"Out of Bounds",
[]Snake{
Snake{ID: "1", Health: 1, Body: []Point{{-1, 1}}},
},
[]string{EliminatedByOutOfBounds},
[]string{""},
nil,
},
{
"Self Collision",
[]Snake{
Snake{ID: "1", Health: 1, Body: []Point{{0, 0}, {0, 1}, {0, 0}}},
},
[]string{EliminatedBySelfCollision},
[]string{"1"},
nil,
},
{
"Multiple Separate Deaths",
[]Snake{
Snake{ID: "1", Health: 1, Body: []Point{{0, 0}, {0, 1}, {0, 0}}},
Snake{ID: "2", Health: 1, Body: []Point{{-1, 1}}},
},
[]string{
EliminatedBySelfCollision,
EliminatedByOutOfBounds},
[]string{"1", ""},
nil,
},
{
"Other Collision",
[]Snake{
Snake{ID: "1", Health: 1, Body: []Point{{0, 2}, {0, 3}, {0, 4}}},
Snake{ID: "2", Health: 1, Body: []Point{{0, 0}, {0, 1}, {0, 2}}},
},
[]string{
EliminatedByCollision,
NotEliminated},
[]string{"2", ""},
nil,
},
{
"All Eliminated Head 2 Head",
[]Snake{
Snake{ID: "1", Health: 1, Body: []Point{{1, 1}}},
Snake{ID: "2", Health: 1, Body: []Point{{1, 1}}},
Snake{ID: "3", Health: 1, Body: []Point{{1, 1}}},
},
[]string{
EliminatedByHeadToHeadCollision,
EliminatedByHeadToHeadCollision,