relatedQueryHelper.load();

        String[] results = relatedQueryHelper.getRelatedQueries("test");
        assertEquals(0, results.length);
    }

    @Test
    public void test_toLowerCase_nullInput() {
        // Test private method indirectly through public methods
        List<RelatedQuery> testData = new ArrayList<>();
        testData.add(createRelatedQuery(null, new String[] { "query" }, ""));