Assignment 4: tests, interface refactor, e2e suite

internal/auth/session.go

@@ -3,11 +3,16 @@ package auth
 import (
 	"crypto/rand"
 	"encoding/hex"
+	"io"
 )
 
 func GenerateToken() (string, error) {
+	return generateToken(rand.Reader)
+}
+
+func generateToken(r io.Reader) (string, error) {
 	b := make([]byte, 32)
-	if _, err := rand.Read(b); err != nil {
+	if _, err := io.ReadFull(r, b); err != nil {
 		return "", err
 	}
 	return hex.EncodeToString(b), nil