Add text to specific product category

Version 1

// =========================================================================
// ADD TEXT TO SPECIFIC PRODUCT CATEGORY
// =========================================================================
function function_name( $attr ) {
    global $product;
    if ( has_term( 'category_name', 'product_cat', $product->get_id() ) ) {
        echo 'TESZT';
    }
    return $attr;
}
add_filter( 'woocommerce_share', 'function_name' );

Version 2

// =========================================================================
// ADD TEXT TO SPECIFIC PRODUCT CATEGORY
// =========================================================================
function add_text_to_spec_cat() {
    global $post;
    $terms = wp_get_post_terms( $post->ID, 'product_cat' );
    foreach ( $terms as $term ) $categories[] = $term->slug;
    if ( in_array( 'szivar', $categories ) ) {
        echo 'TESZT';
    }
}
add_filter( 'woocommerce_after_single_product', 'add_text_to_spec_cat' );