unity: separate common and IDF specific functionality

New unity component can be used for testing other applications.
Upstream version of Unity is included as a submodule.
Utilities specific to ESP-IDF unit tests (partitions, leak checking
setup/teardown functions, etc) are kept only in unit-test-app.
Kconfig options are added to allow disabling certain Unity features.

components/esp32/include/esp_clk.h

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #pragma once
+#include <stdint.h>
 
 /**
  * @file esp_clk.h

components/esp32/test/CMakeLists.txt

@@ -1,7 +1,7 @@
 set(COMPONENT_SRCDIRS ".")
 set(COMPONENT_ADD_INCLUDEDIRS ". ${CMAKE_CURRENT_BINARY_DIR}")
 
-set(COMPONENT_REQUIRES unity nvs_flash ulp)
+set(COMPONENT_REQUIRES unity test_utils nvs_flash ulp)
 
 register_component()
 

components/esp32/test/test_aes_sha_rsa.c

@@ -10,6 +10,7 @@
 #include "freertos/xtensa_timer.h"
 #include "soc/cpu.h"
 #include "unity.h"
+#include "test_utils.h"
 #include "rom/uart.h"
 #include "rom/sha.h"
 #include "soc/uart_reg.h"

components/esp32/test/test_dport.c

@@ -9,10 +9,12 @@
 #include "freertos/xtensa_timer.h"
 #include "soc/cpu.h"
 #include "unity.h"
+#include "test_utils.h"
 #include "rom/uart.h"
 #include "soc/uart_reg.h"
 #include "soc/dport_reg.h"
 #include "soc/rtc.h"
+
 #define MHZ (1000000)
 static volatile bool exit_flag;
 static bool dport_test_result;

components/esp32/test/test_sleep.c

@@ -16,6 +16,7 @@
 #include "soc/soc.h"            // for direct register read macros
 #include "rom/rtc.h"
 #include "esp_newlib.h"
+#include "test_utils.h"
 
 #define ESP_EXT0_WAKEUP_LEVEL_LOW 0
 #define ESP_EXT0_WAKEUP_LEVEL_HIGH 1