Refactor to remove redundant initialization and add NVS storage tests

- Removed unnecessary calls to relay_chn_create and g_is_component_initialized in multiple test cases across test_relay_chn_core_single.c, test_relay_chn_listener_multi.c, and test_relay_chn_listener_single.c.
- Introduced new test files for NVS functionality: test_relay_chn_nvs_multi.c and test_relay_chn_nvs_single.c, covering initialization, direction setting, invalid parameters, and erase operations.
- Updated partition table configuration to support NVS storage, including the addition of a new partition file part_nvs.csv.
- Adjusted sdkconfig files to enable NVS support and configure custom partition settings for relay channels.

test_apps/main/test_app_main.c

@@ -1,11 +1,16 @@
 
+#include <stdbool.h>
 #include "esp_log.h"
 #include "esp_system.h"
-#include "test_common.h"
 #include "unity.h"
 #include "unity_internals.h"
 #include "unity_test_runner.h"
-#include <stdbool.h>
+#include "test_common.h"
+
+#if RELAY_CHN_ENABLE_NVS == 1
+#include "nvs_flash.h"
+#include "relay_chn_nvs.h"
+#endif
 
 
 #ifndef RELAY_CHN_UNITY_TEST_GROUP_TAG
@@ -15,20 +20,60 @@
 
 void setUp() 
 {
-    g_is_component_initialized = false;
+    
 }
 
 void tearDown()
 {
-    // Clean up after each test
-    if (g_is_component_initialized) {
-        relay_chn_destroy();
-        g_is_component_initialized = false;
+    reset_channels_to_idle_state();
+}
+
+static void test_nvs_flash_init(void)
+{
+    esp_err_t ret;
+#if RELAY_CHN_NVS_CUSTOM_PARTITION == 1
+    ret = nvs_flash_init_partition(RELAY_CHN_NVS_CUSTOM_PARTITION_NAME);
+    ESP_LOGI(TEST_TAG, "test_nvs_flash_init: NVS flash init partition return: %s", esp_err_to_name(ret));
+    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
+        // NVS partition is truncated and needs to be erased
+        ret = nvs_flash_erase_partition(RELAY_CHN_NVS_CUSTOM_PARTITION_NAME);
+        if (ret == ESP_OK) {
+            ret = nvs_flash_init_partition(RELAY_CHN_NVS_CUSTOM_PARTITION_NAME);
+        }
     }
+#else
+    ret = nvs_flash_init();
+    ESP_LOGI(TEST_TAG, "test_nvs_flash_init: NVS flash init return: %s", esp_err_to_name(ret));
+    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
+        // NVS partition is truncated and needs to be erased
+        ret = nvs_flash_erase();
+        if (ret == ESP_OK) {
+            ret = nvs_flash_init();
+        }
+    }
+#endif
+    TEST_ESP_OK(ret);
+}
+
+static void test_nvs_flash_deinit(void)
+{
+    esp_err_t ret;
+#if RELAY_CHN_NVS_CUSTOM_PARTITION == 1
+    ret = nvs_flash_deinit_partition(RELAY_CHN_NVS_CUSTOM_PARTITION_NAME);
+#else
+    ret = nvs_flash_deinit();
+#endif
+    TEST_ESP_OK(ret);
 }
 
 void app_main(void) 
 {
+    // Init NVS once for all tests
+    test_nvs_flash_init();
+
+    // Create relay_chn once for all tests
+    TEST_ESP_OK(relay_chn_create(gpio_map, gpio_count));
+
     UNITY_BEGIN();
 
     // Log general test information
@@ -43,6 +88,13 @@ void app_main(void)
     }
 
     UNITY_END();
+
+    // Destroy relay_chn
+    relay_chn_destroy();
+
+    // Deinit NVS
+    test_nvs_flash_deinit();
+
     ESP_LOGI(TEST_TAG, "All tests complete.");
     
     esp_restart(); // Restart to invoke qemu exit