Adds mqtt host tests to Ci

- New job to run host tests
- Fix leak in case of usage of interface name
- Fix host tests to expect a call to `transport_destroy` and add an
  extra case

.gitlab-ci.yml

@@ -49,6 +49,16 @@ build_idf_latest:
   extends: .build_template
   image: espressif/idf:latest
 
+build_and_host_test:
+  stage: build
+  image: espressif/idf:latest
+  script:
+    # Replace the IDF's default esp-mqtt with this version
+    - rm -rf $IDF_PATH/components/mqtt/esp-mqtt && cp -r $MQTT_PATH $IDF_PATH/components/mqtt/
+    - cd $IDF_PATH/components/mqtt/esp-mqtt/host_test
+    - idf.py build
+    - build/host_mqtt_client_test.elf
+
 build_and_test_qemu:
   stage: build
   image: ${CI_DOCKER_REGISTRY}/qemu-v5.1:1-20220802

host_test/main/test_mqtt_client.cpp

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 #include <memory>
+#include <net/if.h>
 #include <random>
 #include <string_view>
 #include <type_traits>
@@ -51,7 +52,6 @@ using unique_mqtt_client = std::unique_ptr < std::remove_pointer_t<esp_mqtt_clie
 
 SCENARIO("MQTT Client Operation")
 {
-    // [[maybe_unused]] auto protect = TEST_PROTECT();
     // Set expectations for the mocked calls.
     int mtx = 0;
     int transport_list = 0;
@@ -76,6 +76,7 @@ SCENARIO("MQTT Client Operation")
     esp_read_mac_IgnoreAndReturn(ESP_OK);
     esp_read_mac_ReturnThruPtr_mac(mac);
     esp_transport_list_destroy_IgnoreAndReturn(ESP_OK);
+    esp_transport_destroy_IgnoreAndReturn(ESP_OK);
     vEventGroupDelete_Ignore();
     vQueueDelete_Ignore();
     GIVEN("An a minimal config") {
@@ -113,6 +114,15 @@ SCENARIO("MQTT Client Operation")
                     REQUIRE(res == ESP_FAIL);
                 }
             }
+            SECTION("User set interface to use"){
+                http_parser_parse_url_ExpectAnyArgsAndReturn(0);
+                http_parser_parse_url_ReturnThruPtr_u(&ret_uri);
+                struct ifreq if_name = {.ifr_ifrn = {"custom"}};
+                config.network.if_name = &if_name;
+                SECTION("Client is not started"){
+                    REQUIRE(esp_mqtt_set_config(client.get(), &config)== ESP_OK);
+                }
+            }
             SECTION("After Start Client Is Cleanly destroyed") {
                 REQUIRE(esp_mqtt_client_start(client.get()) == ESP_OK);
                 // Only need to start the client, destroy is called automatically at the end of

mqtt_client.c

@@ -608,6 +608,7 @@ void esp_mqtt_destroy_config(esp_mqtt_client_handle_t client)
     }
     free(client->config->alpn_protos);
     free(client->config->clientkey_password);
+    free(client->config->if_name);
     free(client->mqtt_state.connection.information.will_topic);
     free(client->mqtt_state.connection.information.will_message);
     free(client->mqtt_state.connection.information.client_id);