Magento – Magento 2: `magento app:config:import` doesn’t import system configuration

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    <script type="text/javascript">
        document.observe("dom:loaded",function(){
            if($('sections_groups_value').value != some_value){
                 Element.up($('sections_groups')).hide();
            }
        });
        Event.observe('sections_groups_value', 'change', function(){
            if(this.value != some_value){
                Element.up($('sections_groups')).hide();
            }else if(this.value == some_value){
                Element.up($('sections_groups')).show();
            }
        })
    </script>]]>
</comment>

Replace "sections_groups_value", "some_value" and "sections_groups" accordingly.

Dropdown cannot get it Source model

macerier_test/system_config_source_dropdown_values that why it showing the error

May be you did not define model prefix.

As per as your code macerier_test . is models prefix

So let define model prefix at config.xml

config.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Macerier_TEST>
            <version>0.1.0</version>
        </Macerier_TEST>
    </modules>
    <!-- add this -->
    <global>
    <models>
        <macerier_test> <!-- call as model prefix identifier -->
            <class>Macerier_TEST_Model</class>
        </macerier_test>
    </models>
    </global>

</config>