package testutil

import "testing"

func TestSnakeA(test *testing.T) {
	snake := S(1, 6).AddVar(
		[]byte { 1 },
		[]byte { 2 },
		[]byte { 3 },
		[]byte { 4 },
		[]byte { 5 },
	).Add(9)

	test.Log(snake)

	ok, n := snake.Check([]byte { 1, 6, 1, 2, 3, 4, 5, 9 })
	if !ok { test.Fatal("false negative:", n) }
	ok, n = snake.Check([]byte { 1, 6, 5, 4, 3, 2, 1, 9 })
	if !ok { test.Fatal("false negative:", n) }
	ok, n = snake.Check([]byte { 1, 6, 3, 1, 4, 2, 5, 9 })
	if !ok { test.Fatal("false negative:", n) }
	
	ok, n = snake.Check([]byte { 1, 6, 9 })
	if ok { test.Fatal("false positive:", n) }
	ok, n = snake.Check([]byte { 1, 6, 1, 2, 3, 4, 5, 6, 9 })
	if ok { test.Fatal("false positive:", n) }
	ok, n = snake.Check([]byte { 1, 6, 0, 2, 3, 4, 5, 6, 9 })
	if ok { test.Fatal("false positive:", n) }
	ok, n = snake.Check([]byte { 1, 6, 7, 1, 4, 2, 5, 9 })
	if ok { test.Fatal("false positive:", n) }
	ok, n = snake.Check([]byte { 1, 6, 7, 3, 1, 4, 2, 5, 9 })
	if ok { test.Fatal("false positive:", n) }
	ok, n = snake.Check([]byte { 1, 6, 7, 3, 1, 4, 2, 5, 9 })
	if ok { test.Fatal("false positive:", n) }
}

func TestSnakeB(test *testing.T) {
	snake := S(1, 6).AddVar(
		[]byte { 1 },
		[]byte { 2 },
	).Add(9).AddVar(
		[]byte { 3, 2 },
		[]byte { 0 },
		[]byte { 1, 1, 2, 3 },
	)

	test.Log(snake)

	ok, n := snake.Check([]byte { 1, 6, 1, 2, 9, 3, 2, 0, 1, 1, 2, 3})
	if !ok { test.Fatal("false negative:", n) }
	ok, n = snake.Check([]byte { 1, 6, 2, 1, 9, 0, 1, 1, 2, 3, 3, 2})
	if !ok { test.Fatal("false negative:", n) }
	
	ok, n = snake.Check([]byte { 1, 6, 9 })
	if ok { test.Fatal("false positive:", n) }
	ok, n = snake.Check([]byte { 1, 6, 1, 2, 9 })
	if ok { test.Fatal("false positive:", n) }
	ok, n = snake.Check([]byte { 1, 6, 9, 3, 2, 0, 1, 1, 2, 3})
	if ok { test.Fatal("false positive:", n) }
	ok, n = snake.Check([]byte { 1, 6, 2, 9, 0, 1, 1, 2, 3, 3, 2})
	if ok { test.Fatal("false positive:", n) }
	ok, n = snake.Check([]byte { 1, 6, 1, 2, 9, 3, 2, 1, 1, 2, 3})
	if ok { test.Fatal("false positive:", n) }
}