dojo7 [課題3-1] タイピングゲームを作ろう

kadai3_1/.gitignore

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+.idea

kadai3_1/asuke-yasukuni/README.md

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+## dojo7 [課題3-1] タイピングゲームを作ろう
+
+課題3-2が重いため、かなり簡素な感じにしました。
+インターフェースの概念に慣れてないせいで、チャネルが絡むテストを書くのが以外に難しかったです。
+
+最終的には割とちゃんと書けた気がします（気がするだけかもしれない）。
+
+## 回答
+
+- 標準出力に英単語を出す（出すものは自由）
+  - OK
+- 標準入力から1行受け取る
+  - OK
+- 制限時間内に何問解けたか表示する
+  - OK
+

kadai3_1/asuke-yasukuni/go.mod

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+module github.com/dojo7/kadai3_1/asuke-yasukuni
+
+go 1.12

kadai3_1/asuke-yasukuni/main.go

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+package main
+
+import (
+	"github.com/dojo7/kadai3_1/asuke-yasukuni/typing"
+)
+
+func main() {
+	typing.SetGame([]string{
+		"tanuki",
+		"gouge",
+		"english",
+	}).Do()
+}

kadai3_1/asuke-yasukuni/typing/game.go

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+package typing
+
+import (
+	"bufio"
+	"fmt"
+	"math/rand"
+	"os"
+	"time"
+)
+
+type InputReader interface {
+	Input() <-chan string
+}
+
+type Reader struct{}
+
+func (r *Reader) Input() <-chan string {
+	ch := make(chan string)
+
+	go func() {
+		s := bufio.NewScanner(os.Stdin)
+		for s.Scan() {
+			ch <- s.Text()
+		}
+		close(ch)
+	}()
+	return ch
+}
+
+type OutputWriter interface {
+	Output(string)
+}
+
+type Writer struct{}
+
+func (w Writer) Output(outputText string) {
+	fmt.Println(outputText)
+}
+
+type Game struct {
+	Time   time.Duration
+	Words  []string
+	Reader InputReader
+	Writer OutputWriter
+}
+
+func SetGame(words []string) *Game {
+	return &Game{
+		Time:   5,
+		Words:  words,
+		Reader: &Reader{},
+		Writer: Writer{},
+	}
+}
+
+func (g *Game) Do() (clearCount int) {
+	ch := g.Reader.Input()
+	timeUp := time.After(g.Time * time.Second)
+
+	t := time.Now().UnixNano()
+	rand.Seed(t)
+
+L:
+	for {
+		i := rand.Intn(len(g.Words))
+		selectWord := g.Words[i]
+		g.Writer.Output(selectWord)
+
+		select {
+		case text := <-ch:
+			if selectWord == text {
+				clearCount++
+				g.Writer.Output("OK")
+			} else {
+				g.Writer.Output("NG")
+			}
+		case <-timeUp:
+			g.Writer.Output("========")
+			g.Writer.Output("time up")
+			g.Writer.Output(fmt.Sprintf("clear count %d", clearCount))
+			break L
+		}
+	}
+
+	return
+}

kadai3_1/asuke-yasukuni/typing/game_test.go

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+package typing
+
+import (
+	"testing"
+	"time"
+)
+
+type TestReader struct {
+	TestWord []string
+}
+
+func (r *TestReader) Input() <-chan string {
+	ch := make(chan string)
+	go func() {
+		for _, word := range r.TestWord {
+			ch <- word
+		}
+		time.Sleep(1 * time.Second)
+		close(ch)
+	}()
+	return ch
+}
+
+type TestWriter struct{}
+
+func (w TestWriter) Output(outputText string) {}
+
+func TestTyping(t *testing.T) {
+
+	var testCase = []struct {
+		Name     string
+		Question []string
+		Word     []string
+		Count    int
+	}{
+		{"all clear", []string{"hoge", "hoge", "hoge", "hoge"}, []string{"hoge", "hoge", "hoge", "hoge"}, 4},
+		{"all fail", []string{"neeko", "enga", "els", "gezi"}, []string{"neko", "english", "eigo", "genzin"}, 0},
+		{"1 clear", []string{"hoge"}, []string{"neko", "hoge", "eigo", "genzin"}, 1},
+	}
+
+	for _, tc := range testCase {
+		game := &Game{
+			Time:   1,
+			Words:  tc.Question,
+			Reader: &TestReader{TestWord: tc.Word},
+			Writer: TestWriter{},
+		}
+		t.Run(tc.Name, func(t *testing.T) {
+			count := game.Do()
+			if count != tc.Count {
+				t.Errorf("%d == %d not equal", count, tc.Count)
+			}
+		})
+	}
+}