} catch (final IOException e) {
                    logger.warn("Failed to access groups/roles in AzureAD.", e);
                }
                return new Pair<>(groupList.stream().distinct().toArray(n1 -> new String[n1]),
                        roleList.stream().distinct().toArray(n2 -> new String[n2]));
            });
        } catch (final ExecutionException e) {
            logger.warn("Failed to process a group cache.", e);

        value = "a=b";
        paramMap = ParameterUtil.parse(value);
        assertEquals(1, paramMap.size());
        assertEquals("b", paramMap.get("a"));

        value = "a=b\n1=2";
        paramMap = ParameterUtil.parse(value);
        assertEquals(2, paramMap.size());
        assertEquals("b", paramMap.get("a"));
        assertEquals("2", paramMap.get("1"));

        value = "a=";