### Question:
Entity_Feature { public String getDevice_feature_model_id() { return device_feature_model_id; } Entity_Feature(tracerengine Trac, Activity activity, String device_feature_model_id, int id, int devId, String device_usage_id, String address, String device_type_id, String description, String name, String state_key, String parameters, String value_type); int getId(); void setId(int id); JSONObject getDevice(); String getDescription(); void setDescription(String description); String getDevice_usage_id(); void setDevice_usage_id(String device_usage_id); String getAddress(); void setAddress(String address); int getDevId(); void setDevId(int devId); String getName(); void setName(String name); String getDevice_feature_model_id(); void setDevice_feature_model_id(String device_feature_model_id); String getState_key(); void setState_key(String state_key); String getParameters(); void setParameters(String parameters); String getValue_type(); void setValue_type(String value_type); int getRessources(); void setState(int state); String getDevice_type(); String getDevice_type_id(); void setDevice_type_id(String device_type_id); String getIcon_name();  }### Answer:
@Test public void testGetDevice_feature_model_id() throws Exception { String device_feature_model_id = client.getDevice_feature_model_id(); Assert.assertEquals(null, device_feature_model_id); client.setDevice_feature_model_id("Device_feature_model_id"); device_feature_model_id = client.getDevice_feature_model_id(); Assert.assertEquals("Device_feature_model_id", device_feature_model_id); }