context3.unbind("myobject");
assertTrue("Correct environment", context3.getEnvironment() != context2.getEnvironment());
context3.addToEnvironment("key2", "value2");
assertTrue("key2 added", "value2".equals(context3.getEnvironment().get("key2")));
context3.removeFromEnvironment("key1");
assertTrue("key1 removed", context3.getEnvironment().get("key1") == null);
assertTrue("Correct DataSource registered", context1.lookup("jdbc/myds") == ds);
try {
context1.lookup("myobject");