// Should contain 4 separators even with null arrays
        long separatorCount = result.chars().filter(ch -> ch == '\n').count();
        assertEquals(4, separatorCount);
    }

    public void test_getCacheKey_emptyArrays() {
        String seed = "test_seed";
        String[] tags = new String[0];
        String[] roles = new String[0];
        String[] fields = new String[0];
        String[] excludes = new String[0];