test_apps: Test multicore app can be run by unicore bootloader

tools/test_apps/system/unicore_bootloader/CMakeLists.txt

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+# The following lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(test_unicore_bootloader)

tools/test_apps/system/unicore_bootloader/README.md

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+| Supported Targets | ESP32 | ESP32-S3 |
+| ----------------- | ----- | -------- |

tools/test_apps/system/unicore_bootloader/README.txt

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+This project tests if the app can start up in a certain configuration.
+Multicore app can start up even if the bootloader is unicore.
+
+The test is only for Multicore chips.

tools/test_apps/system/unicore_bootloader/app_test.py

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+#!/usr/bin/env python
+
+from typing import Any
+
+import ttfw_idf
+
+
+@ttfw_idf.idf_custom_test(env_tag='Example_GENERIC', group='test-apps', target=['esp32', 'esp32s3'])
+def test_multicore_app_and_unicore_bootloader(env, _):  # type: (Any, Any) -> None
+    dut = env.get_dut('unicore_bootloader', 'tools/test_apps/system/unicore_bootloader', app_config_name='multicore_cfg')
+    print('Using binary path: {}'.format(dut.app.binary_path))
+    dut.start_app()
+    dut.expect('Multicore bootloader')
+    dut.expect('Multicore app')
+    dut.expect('App is running')
+
+    another_build_path = dut.app.binary_path.replace('multicore_cfg', 'unicore_cfg')
+    print('Using binary from another_build_path: {}'.format(another_build_path))
+    dut.bootloader_flash(another_build_path)
+    dut.expect('Unicore bootloader')
+    dut.expect('Multicore app')
+    dut.expect('App is running')
+
+
+@ttfw_idf.idf_custom_test(env_tag='Example_GENERIC', group='test-apps', target=['esp32', 'esp32s3'])
+def test_unicore_app_and_multicore_bootloader(env, _):  # type: (Any, Any) -> None
+    dut = env.get_dut('unicore_bootloader', 'tools/test_apps/system/unicore_bootloader', app_config_name='unicore_cfg')
+    print('Using binary path: {}'.format(dut.app.binary_path))
+    dut.expect('Unicore bootloader')
+    dut.expect('Unicore app')
+    dut.expect('App is running')
+
+    another_build_path = dut.app.binary_path.replace('unicore_cfg', 'multicore_cfg')
+    print('Using binary from another_build_path: {}'.format(another_build_path))
+    dut.bootloader_flash(another_build_path)
+    dut.expect('Multicore bootloader')
+    dut.expect('Unicore app')
+    dut.expect('App is running')
+
+
+if __name__ == '__main__':
+    test_multicore_app_and_unicore_bootloader()
+    test_unicore_app_and_multicore_bootloader()

tools/test_apps/system/unicore_bootloader/main/CMakeLists.txt

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+idf_component_register(SRCS "main.c")

tools/test_apps/system/unicore_bootloader/main/main.c

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+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <stdio.h>
+
+void app_main(void)
+{
+    printf("App is running\n");
+}

tools/test_apps/system/unicore_bootloader/sdkconfig.ci.unicore_cfg

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+CONFIG_FREERTOS_UNICORE=y