@Test public void testPutAllEnv() { final SystemProperties props = new SystemProperties(); assertNull(props.getEnv("MY_ENV")); final Map<String, String> env = ImmutableMap.of("MY_ENV", "myvalue"); props.putAllEnv(env); assertEquals("myvalue", props.getEnv("MY_ENV")); assertEquals("myvalue", props.get("env.MY_ENV")); }