@Test
public void getDerivedFieldsMethodMapSupportedExpression() {

    List<DerivedField> derivedFields =
            supportedExpressionSupplier.stream().map(derivedFieldCreator).collect(Collectors.toList());
    AtomicInteger arityCounter = new AtomicInteger();
    Map<String, MethodDeclaration> retrieved = DerivedFieldFunctionUtils.getDerivedFieldsMethodMap(derivedFields,
                                                                                                   arityCounter);
    assertEquals(derivedFields.size(), retrieved.size());
}