public static TestCase of(final String testVariantName,
                                  final String expectedReturn,
                                  final String... params) {
            return new TestCase(
                    testVariantName,
                    ValString.create(expectedReturn),
                    Arrays.stream(params)
                            .map(ValString::create)
                            .collect(Collectors.toList()),
                    Collections.emptyList());
        }
Variant for where all args and return are ValString
stroom-query/stroom-query-language/src/test/java/stroom/query/language/functions/AbstractFunctionTest.java