text: /*
   Tests for the Wi-Fi
  */
  #include "esp_system.h"
  #include "unity.h"
  #include "esp_system.h"
  #include "esp_event_loop.h"
  #include "esp_wifi.h"
  #include "esp_log.h"
  #include "nvs_flash.h"
  
  static const char* TAG = "test_wifi";
  
  #define DEFAULT_SSID "TEST_SSID"
  #define DEFAULT_PWD "TEST_PASS"
  
  static esp_err_t event_handler(void *ctx, system_event_t *event)
  {
      printf("ev_handle_called.\n");
      switch(event->event_id) {
          case SYSTEM_EVENT_STA_START:
              ESP_LOGI(TAG, "SYSTEM_EVENT_STA_START");
      //do not actually connect in test case
              //;
              break;
          case SYSTEM_EVENT_STA_GOT_IP:
              ESP_LOGI(TAG, "SYSTEM_EVENT_STA_GOT_IP");
              ESP_LOGI(TAG, "got ip:%s\n",
              ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));
              break;
          case SYSTEM_EVENT_STA_DISCONNECTED:
              ESP_LOGI(TAG, "SYSTEM_EVENT_STA_DISCONNECTED");
              TEST_ESP_OK(esp_wifi_connect());
              break;
          default:
              break;
      }
      return ESP_OK;
  }
  
  #define EMPH_STR(s) "****** "s" ******"
  
  static void test_wifi_init_deinit(wifi_init_config_t *cfg, wifi_config_t* wifi_config)
  {
      ESP_LOGI(TAG, EMPH_STR("esp_wifi_init"));
      TEST_ESP_OK(esp_wifi_init(cfg));
      ESP_LOGI(TAG, EMPH_STR("esp_wifi_set_mode"));
      TEST_ESP_OK(esp_wifi_set_mode(WIFI_MODE_STA));
      ESP_LOGI(TAG, EMPH_STR("esp_wifi_set_config"));
      TEST_ESP_OK(esp_wifi_set_config(ESP_IF_WIFI_STA, wifi_config));
      ESP_LOGI(TAG, EMPH_STR("esp_wifi_deinit..."));
      TEST_ESP_OK(esp_wifi_deinit());
  }
  
  static void test_wifi_start_stop(wifi_init_config_t *cfg, wifi_config_t* wifi_config)
  {
      ESP_LOGI(TAG, EMPH_STR("esp_wifi_init"));
      TEST_ESP_OK(esp_wifi_init(cfg));
      ESP_LOGI(TAG, EMPH_STR("esp_wifi_set_mode"));
      TEST_ESP_OK(esp_wifi_set_mode(WIFI_MODE_STA));
      ESP_LOGI(TAG, EMPH_STR("esp_wifi_set_config"));
      TEST_ESP_OK(esp_wifi_set_config(ESP_IF_WIFI_STA, wifi_config));
      //now start wifi
      ESP_LOGI(TAG, EMPH_STR("esp_wifi_start..."));
      TEST_ESP_OK(esp_wifi_start());
      //wifi stop
      ESP_LOGI(TAG, EMPH_STR("esp_wifi_stop..."));
      TEST_ESP_OK( esp_wifi_stop() );
      ESP_LOGI(TAG, EMPH_STR("esp_wifi_deinit..."));
      TEST_ESP_OK(esp_wifi_deinit());
  }
  
  TEST_CASE("wifi stop and deinit","[wifi]")
  {    
      wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
      wifi_config_t wifi_config = {
          .sta = {
              .ssid = DEFAULT_SSID,
              .password = DEFAULT_PWD
          },
      };
      
      //init nvs
      ESP_LOGI(TAG, EMPH_STR("nvs_flash_init"));
      esp_err_t r = nvs_flash_init();
      if (r == ESP_ERR_NVS_NO_FREE_PAGES || r == ESP_ERR_NVS_NEW_VERSION_FOUND) {
          ESP_LOGI(TAG, EMPH_STR("no free pages or nvs version mismatch, erase.."));
          TEST_ESP_OK(nvs_flash_erase());
          r = nvs_flash_init();
      } 
      TEST_ESP_OK(r);
      //init tcpip
      ESP_LOGI(TAG, EMPH_STR("tcpip_adapter_init"));
      tcpip_adapter_init();
      //init event loop
      ESP_LOGI(TAG, EMPH_STR("esp_event_loop_init"));
      TEST_ESP_OK(esp_event_loop_init(event_handler, NULL));
      
      ESP_LOGI(TAG, "test wifi init & deinit...");
      test_wifi_init_deinit(&cfg, &wifi_config);
      ESP_LOGI(TAG, "wifi init & deinit seem to be OK.");
  
      ESP_LOGI(TAG, "test wifi start & stop...");
      test_wifi_start_stop(&cfg, &wifi_config);
      ESP_LOGI(TAG, "wifi start & stop seem to be OK.");
  
      ESP_LOGI(TAG, EMPH_STR("nvs_flash_deinit..."));
      nvs_flash_deinit();
      ESP_LOGI(TAG, "test passed...");
  
      TEST_IGNORE_MESSAGE("this test case is ignored due to the critical memory leak of tcpip_adapter and event_loop.");
  }
  