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snake_test.go
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package main
import (
//"github.com/davecgh/go-spew/spew"
"github.com/stretchr/testify/assert"
"testing"
)
func TestSnake(t *testing.T) {
var snake = NewSnake()
assert.Equal(t, snake.direction, Direction(SNAKE_DIRECTION_RIGHT))
assert.Equal(t, len(snake.body), 2)
}
func TestSnakeLen(t *testing.T) {
var snake = NewSnake()
snake.body = Body{Node{x: 0, y: 0}, Node{x: 1, y: 1}}
assert.Equal(t, snake.Len(), 2)
}
func TestSnakeMoveOutOfRightEdge(t *testing.T) {
var snake = NewSnake()
var screenSize = ScreenSize{3, 3}
snake.moveInScreenSize(screenSize)
assert.Equal(t, snake.Len(), 2)
assert.Equal(t, snake.body[0], Node{x: 1, y: 0})
assert.Equal(t, snake.body[1], Node{x: 2, y: 0})
snake.moveInScreenSize(screenSize)
assert.Equal(t, snake.Len(), 2)
assert.Equal(t, snake.body[0], Node{x: 2, y: 0})
assert.Equal(t, snake.body[1], Node{x: 0, y: 0})
}
func TestSnakeMoveOutOfTopEdge(t *testing.T) {
var snake = NewSnake()
var screenSize = ScreenSize{3, 3}
snake.Turn(SNAKE_DIRECTION_UP)
snake.moveInScreenSize(screenSize)
assert.Equal(t, snake.Len(), 2)
assert.Equal(t, snake.body[0], Node{x: 1, y: 0})
assert.Equal(t, snake.body[1], Node{x: 1, y: 2})
snake.moveInScreenSize(screenSize)
assert.Equal(t, snake.Len(), 2)
assert.Equal(t, snake.body[0], Node{x: 1, y: 2})
assert.Equal(t, snake.body[1], Node{x: 1, y: 1})
}
func TestSnakeMoveOutOfBottomEdge(t *testing.T) {
var snake = NewSnake()
var screenSize = ScreenSize{3, 3}
snake.Turn(SNAKE_DIRECTION_DOWN)
snake.moveInScreenSize(screenSize)
snake.moveInScreenSize(screenSize)
assert.Equal(t, snake.Len(), 2)
assert.Equal(t, snake.body[0], Node{x: 1, y: 1})
assert.Equal(t, snake.body[1], Node{x: 1, y: 2})
snake.moveInScreenSize(screenSize)
assert.Equal(t, snake.Len(), 2)
assert.Equal(t, snake.body[0], Node{x: 1, y: 2})
assert.Equal(t, snake.body[1], Node{x: 1, y: 0})
}
func TestSnakeMoveOutOfLeftEdge(t *testing.T) {
var snake = NewSnake()
var screenSize = ScreenSize{3, 3}
snake.Turn(SNAKE_DIRECTION_DOWN)
snake.moveInScreenSize(screenSize)
snake.Turn(SNAKE_DIRECTION_LEFT)
snake.moveInScreenSize(screenSize)
assert.Equal(t, snake.Len(), 2)
assert.Equal(t, snake.body[0], Node{x: 1, y: 1})
assert.Equal(t, snake.body[1], Node{x: 0, y: 1})
snake.moveInScreenSize(screenSize)
assert.Equal(t, snake.Len(), 2)
assert.Equal(t, snake.body[0], Node{x: 0, y: 1})
assert.Equal(t, snake.body[1], Node{x: 2, y: 1})
}
func TestSnakeNewHead(t *testing.T) {
var snake = NewSnake()
var screenSize = ScreenSize{3, 3}
assert.Equal(t, snake.newHead(screenSize), Node{x: 2, y: 0})
snake.moveInScreenSize(screenSize)
assert.Equal(t, snake.newHead(screenSize), Node{x: 0, y: 0})
}
func TestSnakeGrow(t *testing.T) {
var snake = NewSnake()
var screenSize = ScreenSize{3, 3}
snake.growInScreenSize(screenSize)
assert.Equal(t, snake.Len(), 3)
assert.Equal(t, snake.body[0], Node{x: 0, y: 0})
assert.Equal(t, snake.body[1], Node{x: 1, y: 0})
assert.Equal(t, snake.body[2], Node{x: 2, y: 0})
snake.Turn(SNAKE_DIRECTION_DOWN)
snake.moveInScreenSize(screenSize)
assert.Equal(t, snake.Len(), 3)
assert.Equal(t, snake.body[0], Node{x: 1, y: 0})
assert.Equal(t, snake.body[1], Node{x: 2, y: 0})
assert.Equal(t, snake.body[2], Node{x: 2, y: 1})
}
func TestSnakeTurn(t *testing.T) {
var snake = NewSnake()
snake.Turn(SNAKE_DIRECTION_UP)
assert.Equal(t, snake.direction, Direction(SNAKE_DIRECTION_UP))
}
func TestSnakeUTurn(t *testing.T) {
var snake = NewSnake()
snake.direction = SNAKE_DIRECTION_DOWN
snake.Turn(SNAKE_DIRECTION_UP)
assert.Equal(t, snake.direction, Direction(SNAKE_DIRECTION_DOWN))
}
func TestBodyContains(t *testing.T) {
var body = Body{Node{x: 0, y: 0}, Node{x: 1, y: 1}}
assert.Equal(t, body.Contains(Node{x: 1, y: 1}), true)
}
func TestBodyContainsFails(t *testing.T) {
var body = Body{Node{x: 0, y: 0}, Node{x: 1, y: 1}}
assert.Equal(t, body.Contains(Node{x: 1, y: 2}), false)
}