perf tests timechart: Add a perf timechart test

#!/bin/bash

# perf timechart tests

# SPDX-License-Identifier: GPL-2.0

set -e

err=0

perfdata=$(mktemp /tmp/__perf_timechart_test.perf.data.XXXXX)

output=$(mktemp /tmp/__perf_timechart_test.output.XXXXX.svg)

cleanup() {

	rm -f "${perfdata}"

	rm -f "${output}"

	trap - EXIT TERM INT

}

trap_cleanup() {

	echo "Unexpected signal in ${FUNCNAME[1]}"

	cleanup

	exit 1

}

trap trap_cleanup EXIT TERM INT

test_timechart() {

	echo "Basic perf timechart test"

	# Try to record timechart data.

	# perf timechart record uses system-wide recording and specific tracepoints.

	# If it fails (e.g. permissions, missing tracepoints), skip the test.

	if ! perf timechart record -o "${perfdata}" true > /dev/null 2>&1; then

		echo "Basic perf timechart test [Skipped: perf timechart record failed (permissions/events?)]"

		return

	fi

	# Generate the timechart

	if ! perf timechart -i "${perfdata}" -o "${output}" > /dev/null 2>&1; then

		echo "Basic perf timechart test [Failed: perf timechart command failed]"

		err=1

		return

	fi

	# Check if output file exists and is not empty

	if [ ! -s "${output}" ]; then

		echo "Basic perf timechart test [Failed: output file is empty or missing]"

		err=1

		return

	fi

	# Check if it looks like an SVG

	if ! grep -q "svg" "${output}"; then

		echo "Basic perf timechart test [Failed: output doesn't look like SVG]"

		err=1

		return

	fi

	echo "Basic perf timechart test [Success]"

}

if ! perf check feature -q libtraceevent ; then

	echo "perf timechart is not supported. Skip."

        cleanup

	exit 2

fi

test_timechart

cleanup

exit $err