racer: add a first racer test

racer/racer.go

@@ -0,0 +1,23 @@
+package racer
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func Racer(a, b string) string {
+	startA := time.Now()
+	http.Get(a)
+	aDuration := time.Since(startA)
+	fmt.Println(aDuration)
+
+	startB := time.Now()
+	http.Get(b)
+	bDuration := time.Since(startB)
+	fmt.Println(bDuration)
+	if aDuration < bDuration {
+		return a
+	}
+	return b
+}

racer/racer_test.go

@@ -0,0 +1,15 @@
+package racer
+
+import "testing"
+
+func TestRacer(t *testing.T) {
+	slowURL := "http://www.facebook.com"
+	fastURL := "http://www.quii.dev"
+
+	want := fastURL
+	got := Racer(slowURL, fastURL)
+
+	if got != want {
+		t.Errorf("got %q, want %q", got, want)
+	}
+}