feat: add typing core module.

Author: en-ken

kadai3/en-ken/typing/typing.go

@@ -0,0 +1,33 @@
+package typing
+
+import (
+	"math/rand"
+	"time"
+)
+
+// Typing is the class to judge input
+type Typing struct {
+	dict     []string
+	nextText string
+}
+
+// NewTyping is a constructor
+func NewTyping(textDict []string) *Typing {
+	rand.Seed(time.Now().UnixNano())
+
+	return &Typing{
+		dict: textDict,
+	}
+}
+
+// GetNextText returns next text
+func (t *Typing) GetNextText() string {
+	i := rand.Int() % len(t.dict)
+	t.nextText = t.dict[i]
+	return t.nextText
+}
+
+// IsCorrect judges if input is correct or not.
+func (t *Typing) IsCorrect(inputText string) bool {
+	return t.nextText == inputText
+}

kadai3/en-ken/typing/typing_test.go

@@ -0,0 +1,46 @@
+package typing_test
+
+import (
+	"testing"
+
+	"github.com/gopherdojo/dojo6/kadai3/en-ken/typing"
+)
+
+var dict = []string{"ABC", "DEF", "GHI", "JKL", "MNO", "PQR", "STU", "VWX", "YZ"}
+
+func contains(s string) bool {
+	for _, v := range dict {
+		if v == s {
+			return true
+		}
+	}
+	return false
+}
+
+func TestTypingCanGetNextText(t *testing.T) {
+	typ := typing.NewTyping(dict)
+	for i := 0; i < 100; i++ {
+		txt := typ.GetNextText()
+		if !contains(txt) {
+			t.Errorf("actual: %v\n", txt)
+		}
+	}
+}
+
+func TestTypingIsCorrect(t *testing.T) {
+	typ := typing.NewTyping(dict)
+	txt := typ.GetNextText()
+
+	if !typ.IsCorrect(txt) {
+		t.Errorf("IsCorrect() must be true")
+	}
+}
+
+func TestTypingIsCorrectFailed(t *testing.T) {
+	typ := typing.NewTyping(dict)
+	typ.GetNextText()
+
+	if typ.IsCorrect("YZZ") {
+		t.Errorf("IsCorrect() must be false")
+	}
+}