### Question:
ProcessEnvironmentForWin32 extends HashMap<String,String> { @Override public Set<Entry<String,String>> entrySet() { return new CheckedEntrySet(super.entrySet()); } private  ProcessEnvironmentForWin32(); private  ProcessEnvironmentForWin32(int capacity); @Override String put(String key, String value); @Override String get(Object key); @Override boolean containsKey(Object key); @Override boolean containsValue(Object value); @Override String remove(Object key); @Override Set<String> keySet(); @Override Collection<String> values(); @Override Set<Entry<String,String>> entrySet();  }### Answer:
@Test public void testEntrySet() { try { ProcessEnvironmentForWin32 processEnvironmentForWin32 = (ProcessEnvironmentForWin32) ProcessEnvironmentForWin32.emptyEnvironment(0); processEnvironmentForWin32.clear(); processEnvironmentForWin32.put("a", "123"); Assert.assertEquals(0, processEnvironmentForWin32.entrySet().size()); Assert.assertTrue(processEnvironmentForWin32.entrySet().isEmpty()); for (Map.Entry<String, String> entry : processEnvironmentForWin32.entrySet()) { Assert.assertNotNull(entry); Assert.assertNotNull(entry.getKey()); Assert.assertNotNull(entry.getValue()); Assert.assertNotNull(entry.setValue("123")); } processEnvironmentForWin32.clear(); Set<String> keys = processEnvironmentForWin32.keySet(); Assert.assertEquals(0, keys.size()); Assert.assertTrue(keys.isEmpty()); processEnvironmentForWin32.clear(); Collection<String> values = processEnvironmentForWin32.values(); Assert.assertEquals(0, keys.size()); Assert.assertTrue(keys.isEmpty()); } catch (Error | Exception e) { logger.error(e.getMessage()); } }