package apierrors

import (
	"bytes"
	"errors"
	"strings"
	"testing"
)

type failedExport struct{ err error }

func (w failedExport) Write([]byte) (int, error) { return 0, w.err }
func TestCatalogExport(t *testing.T) {
	catalog := Catalog{DefaultStatus: 200, Definitions: map[string]Definition{"INVALID": {Code: int64(9007199254740993), Message: "invalid"}}}
	var out bytes.Buffer
	if err := ExportCatalog(&out, catalog); err != nil {
		t.Fatal(err)
	}
	if !strings.Contains(out.String(), "9007199254740993") {
		t.Fatal(out.String())
	}
	var decoded Catalog
	if err := DecodeCatalogJSON(out.Bytes(), &decoded); err != nil {
		t.Fatal(err)
	}
	registry, err := NewRegistry(decoded)
	if err != nil {
		t.Fatal(err)
	}
	if registry.Resolve(ByCode("INVALID")).Status != 200 {
		t.Fatal("status lost")
	}
	cause := errors.New("write failed")
	if err = ExportCatalog(failedExport{cause}, catalog); !errors.Is(err, cause) {
		t.Fatal("writer failure lost", err)
	}
	if err = ExportCatalog(nil, catalog); err == nil {
		t.Fatal("nil writer accepted")
	}
}