Kadai4 by kaznishi

kadai4/README.md

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+## Usage
+
+```
+$ go build omikuji.go
+$ ./omokuji
+```
+
+上記を実行するとWebサーバが立ち上がるので、localhost:8080にアクセスしてください。

kadai4/fortune/fortune.go

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+package fortune
+
+import (
+	"math/rand"
+	"time"
+)
+
+var fortuneList = []string{"大吉", "中吉", "小吉", "吉", "末吉", "凶", "大凶"}
+
+// Fortune はおみくじの構造体です
+type Fortune struct {
+	Content string `json:"content"`
+}
+
+// FortuneSelector はおみくじ選択処理を行う構造体です
+type FortuneSelector struct {
+	Qlock Qlock
+}
+
+// DefaultQlock はGetCurrenttimeで普通に現在時刻を返す時計です
+type DefaultQlock struct{}
+
+// GetCurrentTime は現在時刻を返す関数です
+func (d DefaultQlock) GetCurrentTime() time.Time {
+	return time.Now()
+}
+
+// Qlock は時計のインターフェースです
+type Qlock interface {
+	GetCurrentTime() time.Time
+}
+
+// SelectFortune はおみくじリストの中からひとつ選んでFortuneオブジェクトを返す関数です
+func (f FortuneSelector) SelectFortune() Fortune {
+	t := f.Qlock.GetCurrentTime()
+	if t.Month() == 1 && (1 <= t.Day() && t.Day() <= 3) {
+		return f.selectFortuneOnlyDaikichi()
+	}
+	return f.selectFortuneRandom()
+}
+
+func (f FortuneSelector) selectFortuneOnlyDaikichi() Fortune {
+	return Fortune{Content: "大吉"}
+}
+
+func (f FortuneSelector) selectFortuneRandom() Fortune {
+	rand.Seed(time.Now().UnixNano())
+	content := fortuneList[rand.Int()%len(fortuneList)]
+	return Fortune{Content: content}
+}

kadai4/fortune/fortune_test.go

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+package fortune
+
+import (
+	"testing"
+	"time"
+)
+
+func TestSelectFortuneDefault(t *testing.T) {
+	var dq DefaultQlock
+	fs := FortuneSelector{Qlock: dq}
+	f := fs.SelectFortune()
+
+	var fortuneList = []string{"大吉", "中吉", "小吉", "吉", "末吉", "凶", "大凶"}
+	exists := false
+	for _, v := range fortuneList {
+		if v == f.Content {
+			exists = true
+			break
+		}
+	}
+	if exists == false {
+		t.Fatalf("unexpected f.Content: %s", f.Content)
+	}
+}
+
+type ManualQlock struct {
+	Time time.Time
+}
+
+func (d ManualQlock) GetCurrentTime() time.Time {
+	return d.Time
+}
+
+func TestSelectFortuneNewYear(t *testing.T) {
+
+	timeList := []time.Time{
+		time.Date(2000, time.January, 1, 0, 0, 0, 0, time.UTC),
+		time.Date(2000, time.January, 2, 12, 0, 0, 0, time.UTC),
+		time.Date(2000, time.January, 3, 23, 59, 0, 0, time.UTC),
+	}
+
+	for _, ti := range timeList {
+		mq := ManualQlock{Time: ti}
+		fs := FortuneSelector{Qlock: mq}
+		f := fs.SelectFortune()
+
+		if f.Content != "大吉" {
+			t.Fatalf("unexpected f.Content when: %s", ti)
+		}
+	}
+}

kadai4/omikuji.go

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+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/gopherdojo/dojo2/kadai4/fortune"
+)
+
+func handler(w http.ResponseWriter, r *http.Request) {
+	var dq fortune.DefaultQlock
+	fs := fortune.FortuneSelector{Qlock: dq}
+	f := fs.SelectFortune()
+
+	var buf bytes.Buffer
+	enc := json.NewEncoder(&buf)
+	if err := enc.Encode(f); err != nil {
+		log.Fatal(err)
+	}
+	fmt.Fprint(w, buf.String())
+}
+
+func main() {
+	fmt.Println("Web Server Starting...")
+	http.HandleFunc("/", handler)
+	http.ListenAndServe(":8080", nil)
+}

kadai4/omikuji_test.go

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+package main
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gopherdojo/dojo2/kadai4/fortune"
+)
+
+func TestHandler(t *testing.T) {
+	w := httptest.NewRecorder()
+	r := httptest.NewRequest("GET", "/", nil)
+	handler(w, r)
+	rw := w.Result()
+	defer rw.Body.Close()
+	if rw.StatusCode != http.StatusOK {
+		t.Fatal("unexpected status code")
+	}
+	b, err := ioutil.ReadAll(rw.Body)
+	if err != nil {
+		t.Fatal("unexpected error")
+	}
+	f := fortune.Fortune{}
+	if err := json.Unmarshal(b, &f); err != nil {
+		t.Fatal("failed json unmarshal")
+	}
+	// fortuneListのうちどれかが返ってきていればOK
+	var fortuneList = []string{"大吉", "中吉", "小吉", "吉", "末吉", "凶", "大凶"}
+	exists := false
+	for _, v := range fortuneList {
+		if v == f.Content {
+			exists = true
+			break
+		}
+	}
+	if exists == false {
+		t.Fatalf("unexpected f.Content: %s", f.Content)
+	}
+}