Add a unit test app + example tests

CMakeLists.txt

@@ -1,34 +1,4 @@
-# For more information about build system see
-# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
-cmake_minimum_required(VERSION 3.8)
-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
+cmake_minimum_required(VERSION 3.16)
+include(common.cmake)
 
-# ESP-ADF clobbers EXTRA_COMPONENT_DIRS, so include it first.
-include($ENV{ADF_PATH}/CMakeLists.txt)
-
-# Build only the subset of components that we actually depend on.
-set(COMPONENTS "")
-
-# External dependencies
-list(APPEND EXTRA_COMPONENT_DIRS "lib/result")
-list(APPEND EXTRA_COMPONENT_DIRS "lib/lvgl")
-
-# Project components
-list(APPEND EXTRA_COMPONENT_DIRS "src")
-
-# Additional warnings used when compiling our components.
-# Unable to be used due to issues in ESP-IDF includes are: -Wpedantic
-# -Wuseless-cast -Wconversion -Wold-style-cast -Wsign-conversion -Wcast-align
-set(EXTRA_WARNINGS "-Wshadow" "-Wnon-virtual-dtor" "-Wunused"
-  "-Woverloaded-virtual" "-Wmisleading-indentation" "-Wduplicated-cond"
-  "-Wduplicated-branches" "-Wlogical-op" "-Wnull-dereference"
-  "-Wdouble-promotion" "-Wformat=2" "-Wimplicit-fallthrough")
-
-include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(gay-ipod-fw)
-
-# Extra build flags that should apply to the entire build. This should mostly
-# just be used to setting flags that our external dependencies requires.
-# Otherwise, prefer adding per-component build flags to keep things neat.
-idf_build_set_property(COMPILE_OPTIONS "-DRESULT_DISABLE_EXCEPTIONS -DLV_CONF_INCLUDE_SIMPLE" APPEND)