The test checks the defined components.

>>>>templates/test.tpl
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<opt:myComponent>
<opt:set name="foo" str:value="bar" />
{$system.component.foo}
</opt:myComponent>

>>>>expected.txt
OUTPUT

>>>>result.txt
VIEW PASSED
PARAM foo PASSED
PARAM foo RETURNED
bar