将JS / jQuery链接到WordPress functions.php

Question

Following a tutorial that recommends the following code to link JS/jQuery to WordPress, within functions.php:

<?php 

function wpbootstrap_scripts_with_jquery()
{
    // Register the script like this for a theme:
    wp_register_script( 'custom-script', get_template_directory_uri() . '/bootstrap/bootstrap.min.js', array( 'https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js' ) );
    // For either a plugin or a theme, you can then enqueue the script:
    wp_enqueue_script( 'custom-script' );
}
add_action( 'wp_enqueue_scripts', 'wpbootstrap_scripts_with_jquery' );

?>

But something is wrong, either the jQuery or the bootstrap.min.js did not link properly, possibly both. How can I ensure that both are linked?