EmptyConfigurationSource implements ConfigurationSource { @Override public Properties getConfiguration(Environment environment) { return properties; }  @Override Properties getConfiguration(Environment environment); @Override void init(); @Override String toString();  }
@Test void returnsEmptyConfiguration() { assertThat(source.getConfiguration(new DefaultEnvironment())).isEmpty(); }
@Test void returnsEmptyConfigurationForAnyEnvironment() { assertThat(source.getConfiguration(mock(Environment.class))).isEmpty(); }