package processing

import (
	"errors"
	"fmt"
	"testing"
)

func TestClientErrorRecognizesRateLimit(t *testing.T) {
	msg, ok := ClientError(ErrRateLimited)
	if !ok {
		t.Fatal("expected ErrRateLimited to be a client error")
	}
	if msg != ErrRateLimited.Error() {
		t.Fatalf("msg=%q", msg)
	}
	if !errors.Is(ErrRateLimited, ErrRateLimited) {
		t.Fatal("sentinel identity broken")
	}
}

func TestClientErrorRecognizesWrappedTooManyProducts(t *testing.T) {
	err := fmt.Errorf("%w (max %d)", ErrTooManyProducts, 50)
	msg, ok := ClientError(err)
	if !ok {
		t.Fatal("expected wrapped ErrTooManyProducts")
	}
	if msg != "too many products (max 50)" {
		t.Fatalf("msg=%q", msg)
	}
}

func TestClientErrorRejectsOpaqueErrors(t *testing.T) {
	if _, ok := ClientError(errors.New("pq: connection refused")); ok {
		t.Fatal("opaque DB error must not be treated as client-safe")
	}
}