is = new InputSource(new URI("http://example.org/test"));
// Extract the JSON style-object from the call.
assertTrue(render(tests), Operation.is(tests, Operator.FUNCTION_CALL));
Operation call = (Operation) tests;
assertEquals(2, call.children().size());
Expression testArray = call.children().get(1);
// testArray is an array like
// [{ test_name: ..., tests: [] }]
for (Expression test : ((ArrayConstructor) testArray).children()) {
ObjectConstructor obj = (ObjectConstructor) test;