Plugging stuff into command-line runner

including adding random initial state generation.

conway/go/conway_test.go

@@ -2,6 +2,7 @@ package conway_test
 
 import (
 	"fmt"
+	"strings"
 	"testing"
 )
 
@@ -12,15 +13,21 @@ import (
 var TEST_SIMPLE_INITIAL_STATE = NewGameState(16, 16)
 
 func init() {
-	tsis := TEST_SIMPLE_INITIAL_STATE
-	tsis.Set(0, 0, 1)
-	tsis.Set(0, 1, 1)
-	tsis.Set(0, 2, 1)
-	tsis.Set(1, 0, 1)
-	tsis.Set(1, 1, 1)
-	tsis.Set(2, 2, 1)
-	tsis.Set(3, 0, 1)
-	tsis.Set(3, 2, 1)
+	s := TEST_SIMPLE_INITIAL_STATE
+	s.Set(0, 0, 1)
+	s.Set(0, 1, 1)
+	s.Set(0, 2, 1)
+	s.Set(1, 0, 1)
+	s.Set(1, 1, 1)
+	s.Set(2, 2, 1)
+	s.Set(3, 0, 1)
+	s.Set(3, 2, 1)
+	s.Set(13, 13, 1)
+	s.Set(13, 14, 1)
+	s.Set(14, 14, 1)
+	s.Set(14, 15, 1)
+	s.Set(15, 13, 1)
+	s.Set(15, 15, 1)
 }
 
 func TestLiveCellWithFewerThanTwoLiveNeighborsDies(t *testing.T) {
@@ -179,6 +186,60 @@ func TestGameStateCanImportState(t *testing.T) {
 	}
 }
 
+func TestGameOfLifeCanImportRandomState(t *testing.T) {
+	game := NewGameOfLife(16, 16)
+	err := game.ImportRandomState()
+
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	zeroCount := 0
+
+	for y := 0; y < 16; y++ {
+		for x := 0; x < 16; x++ {
+			value, err := game.State.Get(x, y)
+			if err != nil {
+				t.Error(err)
+				return
+			}
+
+			if value == 0 {
+				zeroCount++
+			}
+		}
+	}
+
+	if zeroCount == 256 {
+		t.Fail()
+	}
+}
+
+func TestGameStateCanDisplayItself(t *testing.T) {
+	state := NewGameState(16, 16)
+
+	err := state.Import(TEST_SIMPLE_INITIAL_STATE)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	grid := fmt.Sprintf("%s\n", state)
+	lenGrid := len(grid)
+
+	if lenGrid < 256 {
+		t.Errorf("%v < 256", lenGrid)
+		return
+	}
+
+	nLines := strings.Count(grid, "\n")
+	if nLines < 16 {
+		t.Errorf("%v < 16 (lines)", nLines)
+		return
+	}
+}
+
 func TestNewGameStatesAreAllDead(t *testing.T) {
 	state := NewGameState(4, 4)
 	for x := 0; x < 3; x++ {

conway/go/conways-game-of-life/main.go

@@ -1,5 +1,27 @@
 package main
 
+import (
+	"fmt"
+	"os"
+	"time"
+)
+
+import (
+	. "github.com/meatballhat/box-o-sand/conway/go"
+)
+
 func main() {
-	return
+	game := NewGameOfLife(40, 40)
+	err := game.ImportRandomState()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "WHAT IN FAIL?: %v\n", err)
+		os.Exit(2)
+	}
+
+	ticks := time.Tick(1 * time.Second)
+	for now := range ticks {
+		fmt.Printf("\n\n%v\n", now)
+		fmt.Println(game)
+		game.EvaluateGeneration()
+	}
 }

conway/go/game_of_life.go

@@ -3,6 +3,7 @@ package conway
 import (
 	"errors"
 	"fmt"
+	"math/rand"
 	"strings"
 )
 
@@ -117,8 +118,8 @@ func (game *GameOfLife) EvaluateGeneration() error {
 	genScore := NewGenerationScoreCard(height, width)
 	genScore.Calculate(game.State)
 
-	for y := 0; y < height-1; y++ {
-		for x := 0; x < width-1; x++ {
+	for y := 0; y < height; y++ {
+		for x := 0; x < width; x++ {
 			score, err := genScore.Get(x, y)
 			if err != nil {
 				return err
@@ -172,18 +173,46 @@ func (game *GameOfLife) ImportState(state *GameState) error {
 	return game.State.Import(state)
 }
 
+func (game *GameOfLife) ImportRandomState() error {
+	height := game.State.Height()
+	width := game.State.Width()
+
+	if height < 0 || width < 0 {
+		errStr := fmt.Sprintf("current game has invalid dimensions! %vx%v",
+			height, width)
+		return errors.New(errStr)
+	}
+
+	randState := NewGameState(height, width)
+
+	for y := 0; y < height; y++ {
+		for x := 0; x < width; x++ {
+			err := randState.Set(x, y, rand.Intn(2))
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return game.ImportState(randState)
+}
+
 func (game *GameOfLife) String() string {
+	return fmt.Sprintf("%s\n", game.State)
+}
+
+func (state *GameState) String() string {
 	var rows []string
 
-	height := game.State.Height()
-	width := game.State.Width()
+	height := state.Height()
+	width := state.Width()
 
 	for y := 0; y < height; y++ {
 		var cells []string
 		for x := 0; x < width; x++ {
 			stringVal := "X"
 
-			value, err := game.State.Get(x, y)
+			value, err := state.Get(x, y)
 			if err != nil {
 				return ""
 			}
@@ -212,8 +241,8 @@ func NewGenerationScoreCard(height, width int) *GenerationScoreCard {
 
 func (genScore *GenerationScoreCard) Calculate(state *GameState) error {
 	stateHeight, stateWidth := state.Height(), state.Width()
-	for y := 0; y < stateHeight-1; y++ {
-		for x := 0; x < stateWidth-1; x++ {
+	for y := 0; y < stateHeight; y++ {
+		for x := 0; x < stateWidth; x++ {
 			value, err := state.Get(x, y)
 			if err != nil {
 				return err