package extractor

import (
	"errors"
	"testing"
)

type mockCloser struct {
	closed bool
	err    error
}

func (m *mockCloser) Close() error {
	m.closed = true
	return m.err
}

func TestDeferClose_Nil(t *testing.T) {
	// Should not panic on nil.
	DeferClose(nil)
}

func TestDeferClose_Valid(t *testing.T) {
	m := &mockCloser{}
	DeferClose(m)
	if !m.closed {
		t.Error("DeferClose did not call Close()")
	}
}

func TestDeferClose_ErrorIgnored(t *testing.T) {
	m := &mockCloser{err: errors.New("close error")}
	// Should not panic even when Close returns an error.
	DeferClose(m)
	if !m.closed {
		t.Error("DeferClose did not call Close()")
	}
}