@Override
    public Map<String, String> properties() {
        return Collections.unmodifiableMap(systemPropertiesConfigParser.parse(systemPropertiesProvider.get()));
    }
@Test
    public void shouldParseClusternameConfigFromSystemProperties() {
        systemProperties.setProperty("hz.cluster-name", "testcluster");
        assertThat(provider.properties()).containsEntry("hazelcast.cluster-name", "testcluster");
    }