esp-idf/components/driver/test_apps/rmt/main/test_app_main.c

/*
 * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include "unity.h"
#include "unity_test_runner.h"
#include "esp_heap_caps.h"

// Some resources are lazy allocated in RMT driver, so we reserved this threadhold when checking memory leak
// A better way to check a potential memory leak is running a same case by twice, for the second time, the memory usage delta should be zero
#define TEST_MEMORY_LEAK_THRESHOLD (-300)

static size_t before_free_8bit;
static size_t before_free_32bit;

static void check_leak(size_t before_free, size_t after_free, const char *type)
{
    ssize_t delta = after_free - before_free;
    printf("MALLOC_CAP_%s: Before %u bytes free, After %u bytes free (delta %d)\n", type, before_free, after_free, delta);
    TEST_ASSERT_MESSAGE(delta >= TEST_MEMORY_LEAK_THRESHOLD, "memory leak");
}

void setUp(void)
{
    before_free_8bit = heap_caps_get_free_size(MALLOC_CAP_8BIT);
    before_free_32bit = heap_caps_get_free_size(MALLOC_CAP_32BIT);
}

void tearDown(void)
{
    size_t after_free_8bit = heap_caps_get_free_size(MALLOC_CAP_8BIT);
    size_t after_free_32bit = heap_caps_get_free_size(MALLOC_CAP_32BIT);
    check_leak(before_free_8bit, after_free_8bit, "8BIT");
    check_leak(before_free_32bit, after_free_32bit, "32BIT");
}

void app_main(void)
{
    //  ____  __  __ _____   _____         _
    // |  _ \|  \/  |_   _| |_   _|__  ___| |_
    // | |_) | |\/| | | |     | |/ _ \/ __| __|
    // |  _ <| |  | | | |     | |  __/\__ \ |_
    // |_| \_\_|  |_| |_|     |_|\___||___/\__|
    printf(" ____  __  __ _____   _____         _\r\n");
    printf("|  _ \\|  \\/  |_   _| |_   _|__  ___| |_\r\n");
    printf("| |_) | |\\/| | | |     | |/ _ \\/ __| __|\r\n");
    printf("|  _ <| |  | | | |     | |  __/\\__ \\ |_\r\n");
    printf("|_| \\_\\_|  |_| |_|     |_|\\___||___/\\__|\r\n");
    unity_run_menu();
}