package errors

import (
	"errors"
	"testing"
)

func TestAppErrorBasics(t *testing.T) {
	root := errors.New("root")
	appErr := NewBadRequest("bad", root)

	if appErr.Code != 400 || appErr.Message != "bad" {
		t.Fatalf("unexpected appErr fields: %+v", appErr)
	}
	if got := appErr.Error(); got != "bad: root" {
		t.Fatalf("unexpected Error(): %s", got)
	}
	if !Is(appErr, root) {
		t.Fatalf("Is should match wrapped error")
	}
	var target *AppError
	if !As(appErr, &target) {
		t.Fatalf("As should succeed")
	}
}

func TestWrap(t *testing.T) {
	if Wrap(nil, "msg") != nil {
		t.Fatalf("Wrap nil should return nil")
	}
	err := errors.New("base")
	wrapped := Wrap(err, "ctx")
	if wrapped.Error() != "ctx: base" {
		t.Fatalf("wrap message mismatch: %v", wrapped)
	}
}