feat: sync configurable OTP delivery providers

internal/otpdelivery/delivery_test.go

@@ -0,0 +1,36 @@
+package otpdelivery
+
+import (
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestNewDeliveryIDIsOpaqueAndUnique(t *testing.T) {
+	first, err := NewDeliveryID()
+	if err != nil {
+		t.Fatalf("first id: %v", err)
+	}
+	second, err := NewDeliveryID()
+	if err != nil {
+		t.Fatalf("second id: %v", err)
+	}
+	if first == second || !strings.HasPrefix(first, "otp_") || len(first) != len("otp_")+32 {
+		t.Fatalf("ids = %q / %q", first, second)
+	}
+}
+
+func TestRequestRejectsExpiredCode(t *testing.T) {
+	now := time.Now()
+	err := (Request{
+		DeliveryID: "otp_expired",
+		Purpose:    PurposeLoginEmail,
+		Channel:    ChannelEmail,
+		Recipient:  "a@example.test",
+		Code:       "123456",
+		ExpiresAt:  now,
+	}).Validate(now)
+	if err == nil {
+		t.Fatal("expired request accepted")
+	}
+}