Yocto simple QA Tests

bbexample_1.0.bb

SUMMARY = "Simple Hello World Cmake application"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"

SRC_URI = "\
            file://CMakeLists.txt \
            file://hellocmake.cpp \
        "

S = "${WORKDIR}"

inherit cmake qa

# qa.bbclass would ensure that all files in QA_CHECK_FILES exist in the target root filesystem 
QA_CHECK_FILES = " file:///usr/bin/program \
                   file:///usr/lib/library.so.5;name=library5 \
                   file:///usr/lib/library.so;name=library \
"

# Aditionnaly, we could also do some basic check
QA_CHECK_FILES[program.type] = "elf"    # Ensure that the elf header is present
QA_CHECK_FILES[program.size] = ">10MB"  # Ensure that the file is bigger than 10MB
QA_CHECK_FILES[library5.size] = "<50MB" # Ensure that the file is smaller than 50MB
QA_CHECK_FILES[library.type] = "link"   # Ensure that these file is a symbolic link

qa.bbclass

...

python do_post_install_qa() {

    qa_check_files = d.getVar("QA_CHECK_FILES", expand=True).split()
    for file in qa_check_files:
        qa_check_file(file)
}
addtask post_install_qa after do_install before do_package

...