Woocommerce action hooks not firing

I have a wordpress proejct with woocommerce plugin installed. I’m trying to add some woocommerce action hooks to my functions.php file just for testing purposes and none of them are firing

add_action( 'woocommerce_single_product_summary', 'woocommerce_show_product', 1);

add_action( 'woocommerce_before_single_product', 'woocommerce_show_product', 1 );

add_action( 'woocommerce_before_add_to_cart_form', 'woocommerce_show_product', 1 );

add_action( 'woocommerce_before_single_product_summary', 'woocommerce_show_product', 1 );

function woocommerce_show_product() {
    echo 'GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG';
};

What could be the reason that woocommerce action hooks don’t fire?