ptest support for systemd was dropped in 2018 (commit 906230a73b3c) when the 
recipe switched to meson, as there was no easy way to install and run the test 
suite. Current systemd and meson resolve this: the meson 'install-tests' option 
installs the unit-test binaries and a run-unit-tests.py runner under 
${prefix}/lib/systemd/tests, and run-unit-tests.py already emits PASS:/SKIP: 
results per test.

Enable install-tests, package the installed tree into systemd-ptest, and add a 
run-ptest wrapper that drives run-unit-tests.py. This provides ptest coverage 
for the systemd:test and libsystemd meson unit-test suites.

The test/units integration tests, which require a booted system, are out of 
scope here and can be addressed separately.

Verified on systemd 257.6: -Dinstall-tests=true installs 313 test-* unit-test 
binaries plus run-unit-tests.py; systemd-ptest packages cleanly. The recipe 
change parses without error against oe-core master (261.2).

[YOCTO #16386]

Signed-off-by: Himani Ramesh Barde <[email protected]>
---
 meta/recipes-core/systemd/systemd/run-ptest | 11 +++++++++++
 meta/recipes-core/systemd/systemd_261.2.bb  | 18 +++++++++++++++++-
 2 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100755 meta/recipes-core/systemd/systemd/run-ptest

diff --git a/meta/recipes-core/systemd/systemd/run-ptest 
b/meta/recipes-core/systemd/systemd/run-ptest
new file mode 100755
index 0000000000..b2204b96d4
--- /dev/null
+++ b/meta/recipes-core/systemd/systemd/run-ptest
@@ -0,0 +1,11 @@
+#!/bin/sh
+# Run systemd's installed meson unit tests in ptest format.
+# systemd's -Dinstall-tests=true installs run-unit-tests.py plus the
+# unit-tests/test-* binaries; run-unit-tests.py already emits PASS:/SKIP: 
lines.
+set -u
+here="$(cd "$(dirname "$0")" && pwd)"
+for cand in "$here/run-unit-tests.py" "$here/tests/run-unit-tests.py" 
/usr/lib/systemd/tests/run-unit-tests.py; do
+    [ -f "$cand" ] && { python3 "$cand" 2>&1; exit 0; }
+done
+echo "FAIL: systemd-ptest (run-unit-tests.py not found)"
+exit 1
diff --git a/meta/recipes-core/systemd/systemd_261.2.bb 
b/meta/recipes-core/systemd/systemd_261.2.bb
index 80e1aa07d1..dfd2b7c0c9 100644
--- a/meta/recipes-core/systemd/systemd_261.2.bb
+++ b/meta/recipes-core/systemd/systemd_261.2.bb
@@ -9,7 +9,7 @@ DEPENDS:append:libc-musl = " libucontext"
 
 SECTION = "base/shell"
 
-inherit useradd pkgconfig meson perlnative update-rc.d update-alternatives 
systemd gettext bash-completion manpages features_check mime
+inherit useradd pkgconfig meson perlnative update-rc.d update-alternatives 
systemd gettext bash-completion manpages features_check mime ptest
 
 # unmerged-usr support is deprecated upstream, taints the system and will be
 # removed in the near future. Fail the build if it is not enabled.
@@ -37,6 +37,7 @@ SRC_URI += " \
            file://systemd-pager.sh \
            
file://0001-binfmt-Don-t-install-dependency-links-at-install-tim.patch \
            file://0003-Do-not-create-var-log-README.patch \
+file://run-ptest \
            "
 
 PAM_PLUGINS = " \
@@ -937,3 +938,18 @@ python do_warn_musl() {
         bb.warn("Using systemd with musl is experimental, see 
https://github.com/systemd/systemd/blob/9ca4334/NEWS#L524 for details")
 }
 addtask warn_musl before do_configure
+
+# ptest support: systemd's meson 'install-tests' option installs the unit-test
+# binaries and run-unit-tests.py under ${prefix}/lib/systemd/tests. Package 
them
+# into systemd-ptest and drive them via run-ptest. [YOCTO #16386]
+EXTRA_OEMESON:append = " -Dinstall-tests=true"
+
+do_install_ptest() {
+    install -d ${D}${PTEST_PATH}
+    if [ -d ${D}${prefix}/lib/systemd/tests ]; then
+        cp -r ${D}${prefix}/lib/systemd/tests/* ${D}${PTEST_PATH}/
+    fi
+}
+
+RDEPENDS:${PN}-ptest += "${PN} python3-core bash"
+INSANE_SKIP:${PN}-ptest += "dev-deps debug-files"
-- 
2.54.0

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