verify the username, email and nickname are valid when registering via OAuth 2.0

pkg/validators/nickname_test.go

@@ -0,0 +1,28 @@
+package validators
+
+import (
+	"testing"
+
+	"github.com/go-playground/validator/v10"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestValidNickname(t *testing.T) {
+	validate := validator.New()
+	err := validate.RegisterValidation("validNickname", ValidNickname)
+	assert.Nil(t, err)
+
+	nickname := "0123456789012345678901234567890123456789012345678901234567890123"
+	err = validate.Var(nickname, "validNickname")
+	assert.Nil(t, err)
+}
+
+func TestInvalidNickname(t *testing.T) {
+	validate := validator.New()
+	err := validate.RegisterValidation("validNickname", ValidNickname)
+	assert.Nil(t, err)
+
+	nickname := "01234567890123456789012345678901234567890123456789012345678901234"
+	err = validate.Var(nickname, "validNickname")
+	assert.NotNil(t, err)
+}