fix(modem): Update target test builds to use external Catch2

Switched from the deprecated Catch framework (IDF/tools) to Catch2,
as Catch will be removed in v6.0.
Note that Catch2 has higher memory requirements,
necessitating an increase in stack size and partition table.
Additionally, Catch2 increases compilation time due to its larger footprint.

components/esp_modem/test/target/main/CMakeLists.txt

@@ -1,6 +1,6 @@
 idf_component_register(SRCS "pppd_test.cpp"
                             "NetworkDCE.cpp"
-        REQUIRES esp_modem)
+                       REQUIRES esp_modem catch2)
 
 set_target_properties(${COMPONENT_LIB} PROPERTIES
     CXX_STANDARD 17

components/esp_modem/test/target/main/idf_component.yml

@@ -0,0 +1,4 @@
+dependencies:
+  espressif/catch2: "*"
+  idf:
+    version: ">=4.4"

components/esp_modem/test/target/main/pppd_test.cpp

@@ -17,6 +17,10 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/event_groups.h"
 
+#define CATCH_CONFIG_MAIN
+#include "catch2/catch_test_macros.hpp"
+#include "catch2/catch_session.hpp"
+
 static const char *TAG = "pppd_test";
 static EventGroupHandle_t event_group = NULL;
 
@@ -73,9 +77,6 @@ esp_err_t modem_init_network(esp_netif_t *netif);
 void modem_start_network();
 void modem_stop_network();
 
-bool test_connect();
-bool test_disconnect();
-
 extern "C" void app_main(void)
 {
 
@@ -99,27 +100,41 @@ extern "C" void app_main(void)
 #endif
 
     modem_start_network();
-
-    bool t1 = test_connect();
-    bool t2 = test_disconnect();
-
-    if (t1 && t2) {
-        ESP_LOGI(TAG, "All tests passed");
-    } else {
+    Catch::Session session;
+    int numFailed = session.run();
+    if (numFailed > 0) {
         ESP_LOGE(TAG, "Test FAILED!");
+    } else {
+        ESP_LOGI(TAG, "Test passed!");
     }
 
 }
 
-bool test_connect() //("Connect test", "[esp_modem]")
+TEST_CASE("Connect test", "[esp_modem]")
 {
     EventBits_t b = xEventGroupWaitBits(event_group, 1, pdTRUE, pdFALSE, pdMS_TO_TICKS(15000));
-    return b == 1;
+    CHECK(b == 1);
 }
 
-bool test_disconnect() //("Disconnection test", "[esp_modem]")
+TEST_CASE("Disconnection test", "[esp_modem]")
 {
     modem_stop_network();
     EventBits_t b = xEventGroupWaitBits(event_group, 2, pdTRUE, pdFALSE, pdMS_TO_TICKS(15000));
-    return b == 2;
+    CHECK(b == 2);
+}
+
+
+extern "C" {
+
+    static void handle(int nr)
+    {
+        ESP_LOGE(TAG, "Signal handler %d", nr);
+    }
+
+    _sig_func_ptr signal (int nr, _sig_func_ptr)
+    {
+        return handle;
+    }
+
+
 }

components/esp_modem/test/target/sdkconfig.ci.pppd_chap_auth

@@ -1,4 +1,5 @@
 CONFIG_COMPILER_CXX_EXCEPTIONS=y
-CONFIG_ESP_MAIN_TASK_STACK_SIZE=4096
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
 CONFIG_LWIP_PPP_SUPPORT=y
+CONFIG_PARTITION_TABLE_SINGLE_APP_LARGE=y
 CONFIG_TEST_APP_AUTH=y

components/esp_modem/test/target/sdkconfig.defaults

@@ -1,3 +1,4 @@
 CONFIG_COMPILER_CXX_EXCEPTIONS=y
-CONFIG_ESP_MAIN_TASK_STACK_SIZE=4096
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
 CONFIG_LWIP_PPP_SUPPORT=y
+CONFIG_PARTITION_TABLE_SINGLE_APP_LARGE=y