Wordpress: Returning every term of a specific taxonomy

I'm attempting to return every term of a specific taxonomy. I just need to add terms to an object which I can loop through. I've been working on this for while but don't seem to be able to get anywhere.

So for example I have the Taxonomy 'Brand', I have several terms within this taxonomy. How can I return every term under this taxonomy.

Thanks

I have tried the following:

global $product
    $test_value = get_the_terms( $product->id, 'pa-brands');
        foreach($test_value as $test_values){
        echo $test_values->name;

        }

Only this shows an error int the log: 'Unexpected T_Variable'

via Chebli Mohamed