package contracts

import (
	"errors"
	"testing"
)

func TestLLMGenerationErrorPreservesApplicationMetadata(t *testing.T) {
	legacy := NewLLMGenerationError(503, "provider failure")
	if !errors.Is(legacy, ErrLLMGeneration) || legacy.StatusCode() != 503 || legacy.FailureKind() != LLMGenerationFailureGeneration || legacy.RetriesExhausted() || legacy.Attempts() != 0 {
		t.Fatalf("legacy generation error = %#v", legacy)
	}

	err := NewLLMGenerationErrorWithMetadata(429, "provider failure", LLMGenerationMetadata{
		FailureKind:      LLMGenerationFailureProviderStatus,
		RetriesExhausted: true,
		Attempts:         3,
	})
	if !errors.Is(err, ErrLLMGeneration) || err.StatusCode() != 429 || err.FailureKind() != LLMGenerationFailureProviderStatus || !err.RetriesExhausted() || err.Attempts() != 3 {
		t.Fatalf("generation error = %#v", err)
	}
}