Merge pull request ARMmbed#8469 from VeijoPesonen/tc-ipcore-wifi-wifi_connect

mbedgt-network-wifi WIFI_CONNECT - check for empty passwd

Author: Cruz Monrreal

TESTS/network/wifi/wifi_connect.cpp

@@ -30,8 +30,12 @@ void wifi_connect(void)
     WiFiInterface *wifi = get_interface();
 
     TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->set_credentials(MBED_CONF_APP_WIFI_UNSECURE_SSID, NULL));
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->connect());
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->disconnect());
 
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->set_credentials(MBED_CONF_APP_WIFI_UNSECURE_SSID, ""));
     TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->connect());
+    TEST_ASSERT_EQUAL_INT(NSAPI_ERROR_OK, wifi->disconnect());
 }
 
 #endif // defined(MBED_CONF_APP_WIFI_UNSECURE_SSID)