[PATCH V2] perf test: Add support for testing gecko script

[Anup Sharma <anupnewsmail@gmail.com>]

This commit add support for testing gecko script. The test checks
for the presence of required sections such as "meta," "threads,"
"samples," "frameTable," "stackTable," "stringTable," and
"pausedRanges" which are few essential parameter to be present
in output file. Also it verifies the validity of the JSON format
using Python's JSON library if available.

Signed-off-by: Anup Sharma <anupnewsmail@gmail.com>

---
Patch needed for testing:
    https://lore.kernel.org/linux-perf-users/ZNOS0vo58DnVLpD8@yoga/T/#u

changes in v2:
    - Removed uncessary prepare_perf_data.
    - provided patch which is required for testing this patch.
---
 tools/perf/tests/shell/test_gecko.sh | 130 +++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100755 tools/perf/tests/shell/test_gecko.sh

diff --git a/tools/perf/tests/shell/test_gecko.sh b/tools/perf/tests/shell/test_gecko.sh
new file mode 100755
index 000000000000..44160eff87fd
--- /dev/null
+++ b/tools/perf/tests/shell/test_gecko.sh
@@ -0,0 +1,130 @@
+#!/bin/bash
+# perf script gecko test
+# SPDX-License-Identifier: GPL-2.0
+
+err=0
+
+cleanup() {
+  rm -rf gecko_profile.json
+  trap - exit term int
+}
+
+trap_cleanup() {
+  cleanup
+  exit 1
+}
+trap trap_cleanup exit term int
+
+report() {
+    if [ "$1" = 0 ]; then
+        echo "PASS: \"$2\""
+    else
+        echo "FAIL: \"$2\" Error message: \"$3\""
+        err=1
+    fi
+}
+
+find_str_or_fail() {
+    grep -q "$1" <<< "$2"
+    if [ "$?" != 0 ]; then
+        report 1 "$3" "Failed to find required string:'${1}'."
+    else
+        report 0 "$3"
+    fi
+}
+
+# To validate the json format, check if python is installed
+if [ "$PYTHON" = "" ] ; then
+	if which python3 > /dev/null ; then
+		PYTHON=python3
+	elif which python > /dev/null ; then
+		PYTHON=python
+	else
+		echo Skipping JSON format check, python not detected please set environment variable PYTHON.
+		PYTHON_NOT_AVAILABLE=1
+	fi
+fi
+
+# Check execution of perf script gecko command
+test_gecko_command() {
+    echo "Testing Gecko Command"
+    perf script gecko -a sleep 0.5
+    # Store the content of the file in the 'out' variable
+    out=$(< "gecko_profile.json")
+    # Get the length of the gecko_profile.json output in 'out'
+	length=${#out}
+	if [ "$length" -gt 0 ]; then
+        echo "PASS: \"Gecko Command\""
+    else
+        echo "FAIL: \"Gecko Command\""
+        err=1
+        exit
+    fi
+}
+
+# with the help of python json libary validate the json output
+if [ "$PYTHON_NOT_AVAILABLE" != "0" ]; then
+	validate_json_format()
+	{
+		if [ "$out" ] ; then
+			if [ "$PYTHON -c import json; json.load($out)" ]; then
+				echo "PASS: \"The file contains valid JSON format\""
+			else
+				echo "FAIL: \"The file does not contain valid JSON format\""
+				err=1
+				exit
+			fi
+		else
+			echo "FAIL: \"File not found\""
+			err=2
+			exit
+		fi
+	}
+fi
+
+# validate output for the presence of "meta".
+test_meta() {
+    find_str_or_fail "meta" "$out" "${FUNCNAME[0]}"
+}
+
+# validate output for the presence of "threads".
+test_threads() {
+	find_str_or_fail "threads" "$out" "${FUNCNAME[0]}"
+}
+
+# validate output for the presence of "samples".
+test_samples() {
+	find_str_or_fail "samples" "$out" "${FUNCNAME[0]}"
+}
+
+# validate output for the presence of "frameTable".
+test_frametable() {
+	find_str_or_fail "frameTable" "$out" "${FUNCNAME[0]}"
+}
+
+# validate output for the presence of "stackTable".
+test_stacktable() {
+	find_str_or_fail "stackTable" "$out" "${FUNCNAME[0]}"
+}
+
+# validate output for the presence of "stringTable"
+test_stringtable() {
+	find_str_or_fail "stringTable" "$out" "${FUNCNAME[0]}"
+}
+
+# validate output for the presence of "pausedRanges".
+test_pauseranges(){
+	find_str_or_fail "pausedRanges" "$out" "${FUNCNAME[0]}"
+}
+
+test_gecko_command
+validate_json_format
+test_meta
+test_threads
+test_samples
+test_frametable
+test_stacktable
+test_stringtable
+test_pauseranges
+cleanup
+exit $err
-- 
2.34.1