Merge pull request #14765 from rwalton-arm/fix_unittest_check ...

Fix unittest check

remove unittest readme

CMake: unit-tests: Fetch googletest master ...

googletest now follows the "Abseil Live at HEAD" philosophy, which means
they recommend using the latest commit on the master branch and always
compiling from source. They recommend this to avoid version mismatch
issues and "diamond dependency" problems which are common in dependency
graphs with pinned versions. Google make the "promise" that future
changes won't break downstream code if it follows the "Abseil
compatability guidelines".

Upping the version to master also fixes some CMake configure time
warnings that were present with the older tagged releases of googletest:

CMake Deprecation Warning at __build/_deps/googletest-src/CMakeLists.txt:4 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.

CMake Deprecation Warning at __build/_deps/googletest-src/googlemock/CMakeLists.txt:45 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.

CMake Deprecation Warning at __build/_deps/googletest-src/googletest/CMakeLists.txt:56 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.

CMake: unit-tests: Remove trailing whitespace from stubs/CMakeLists.txt

fix typos ...

Co-authored-by: Chris Swinchatt <christopher.swinchatt@arm.com>

Add a readme to unit tests

missing newlines

add missing tuple c++ replacement for unittests

add fake googlemock BLE API for unittests

add fake event queue for unittests

Merge pull request #14708 from Patater/fix-test-function-return ...

test: Fix function does not return a value warnings

test: Fix function does not return a value warnings ...

Many test stub functions are meant to return a value, but weren't. Clang
would generate a warning for each instance where we weren't returning
anything in a function that was meant to return a value.

    warning: non-void function does not return a value [-Wreturn-type]

For a specific example, my_radio::time_on_air() is supposed to return a
uint32_t, but wasn't returning anything. We'll return a zero instead of
relying on undefined behavior.

Without this, clang 11.0.1 was generating a virtual function
implementation with a `ud2` instruction to abort at run-time, causing
some execution of some unit tests to abort.

    Running main() from gmock_main.cc
    [==========] Running 10 tests from 1 test suite.
    [----------] Global test environment set-up.
    [----------] 10 tests from Test_LoRaPHYUS915
    [ RUN      ] Test_LoRaPHYUS915.constructor
    [       OK ] Test_LoRaPHYUS915.constructor (0 ms)
    [ RUN      ] Test_LoRaPHYUS915.restore_default_channels
    [       OK ] Test_LoRaPHYUS915.restore_default_channels (0 ms)
    [ RUN      ] Test_LoRaPHYUS915.rx_config
    [       OK ] Test_LoRaPHYUS915.rx_config (0 ms)
    [ RUN      ] Test_LoRaPHYUS915.tx_config
    Process 35669 stopped
    * thread #1, name = 'lorawan-loraphy-', stop reason = signal SIGILL: privileged instruction
        frame #0: 0x0000000000276f73 lorawan-loraphy-us915-unittest`my_radio::time_on_air(this=0x0000000800c2b048, modem=MODEM_LORA, pkt_len='\0') at Test_LoRaPHYUS915.cpp:90:5
       87       };
       88
       89       virtual uint32_t time_on_air(radio_modems_t modem, uint8_t pkt_len)
    -> 90       {
       91       };
       92
       93       virtual bool perform_carrier_sense(radio_modems_t modem,
    (lldb) disassemble --pc
    lorawan-loraphy-us915-unittest`my_radio::time_on_air:
    ->  0x276f73 <+67>: ud2
        0x276f75:       int3
        0x276f76:       int3
        0x276f77:       int3
    (lldb)

CMake: Remove all unittest.cmake script from test suite ...

- Remove redundant cmake script as already added the CMake configuration file
- Remove redundant empty_baseline as it is no longer needed with the help of CMake configuration file

CMake: Update hal and platform stub CMake linker options for coverage ...

- Armclang is not working when we add gcov as target_link_libraries,
modified to pass as linker options with --coverage so it can work armclang and gcc

CMake: Update build tools python modules to pick refactored way of unittest CMake ...

- Update mbed_unittest python module to pick unittest from mbed os root
CMake configuration file
- Add BUILD_TESTING flag ON in test python module

CMake: Update mbed os, unittest CMake and add CMAKE_CROSSCOMPILING guard ...

- Add a new MbedOS project in mbed os root CMake which can be used along with
  BUILD_TESTING conditional check for enabling the unittest build
- Update UNITTEST CMake for setting the CMake configuration like c, cxx flags etc.,
- Add if CMAKE_CROSSCOMPILING conditional check wherever target configuration check
  and toolchain configuration to avoid such configuration gets included for unittest build.

CMake: Update target_h stub headers ...

- Avoid using cmsis headers as it brings more redundant dependency into unittest build and for unittest build, all the required OS flags can provide from mbed rtos types header so replaced cmsis header with mbed os types header

CMake: Remove duplicate documents ...

- Remove the readme as it is a duplicate content of official document
  https://os.mbed.com/docs/mbed-os/v6.9/debug-test/unit-testing.html

sort stubs into libraries

Lora: Add LoRaWANTimer::clear in stubs

Fix sys/stat.h issue for unit tests on macOS

update version in readme

upgrade gtest to 1.10

Update UNITTEST for kvstore

Update unittests

Merge pull request #13492 from talorion/fix-PwmOut-resets-after-suspend ...

Fix pwm out resets after suspend

pwmout - UNITTESTS - add read methods for period and pulsewidth

Add include/ path for mbed-trace

Move mbed-trace into platform

Update UNITTESTS header reference