[PATCH v2] perf: test: Add support for testing JSON generated by perf data command

[Anup Sharma <anupnewsmail@gmail.com>]

This commit adds support for testing the JSON output generated
by the perf data command's conversion to JSON functionality.
The test script now includes a validation step to ensure that
the resulting JSON file is contain valid data.

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

Changes:
V1 -> V2: Added a check for the existence of the result output file.
          Replaced the usage of jq with json.load for validating the JSON format.
          Checks using ShellCheck and checkpatch, addressing and resolving warnings.
          Removed the unnecessary root permission check.
          Modified the perf record command to avoid requiring root permissions.
---
 .../shell/test_perf_data_converter_json.sh    | 78 +++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100755 tools/perf/tests/shell/test_perf_data_converter_json.sh

diff --git a/tools/perf/tests/shell/test_perf_data_converter_json.sh b/tools/perf/tests/shell/test_perf_data_converter_json.sh
new file mode 100755
index 000000000000..54b7a19962fa
--- /dev/null
+++ b/tools/perf/tests/shell/test_perf_data_converter_json.sh
@@ -0,0 +1,78 @@
+#!/bin/bash
+# perf data json converter command test
+# SPDX-License-Identifier: GPL-2.0
+
+set -e
+
+err=0
+
+if [ "$PYTHON" = "" ]
+then
+	if which python3 > /dev/null
+	then
+		PYTHON=python3
+	elif which python > /dev/null
+	then
+		PYTHON=python
+	else
+		echo Skipping test, python not detected please set environment variable PYTHON.
+		exit 2
+	fi
+fi
+
+perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
+result=$(mktemp /tmp/__perf_test.output.json.XXXXX)
+
+cleanup()
+{
+	rm -f "${perfdata}"
+	rm -f "${result}"
+	trap - exit term int
+}
+
+trap_cleanup()
+{
+	cleanup
+	exit ${err}
+}
+trap trap_cleanup exit term int
+
+test_json_converter_command()
+{
+	echo "Testing Perf Data Convertion Command to JSON"
+	perf record -o "$perfdata" -F 99 -g -- perf test -w noploop > /dev/null 2>&1
+	perf data convert --to-json "$result" --force -i "$perfdata" >/dev/null 2>&1
+	if [ $(cat "${result}" | wc -l) -gt "0" ]
+	then
+		echo "Perf Data Converter Command to JSON [SUCCESS]"
+	else 
+		echo "Perf Data Converter Command to JSON [FAILED]"
+		err=1
+		exit
+	fi
+}
+
+validate_json_format()
+{
+    echo "Validating Perf Data Converted JSON file"
+    if [ -f "$result" ]
+    then
+        if $PYTHON -c  "import json; json.load(open('$result'))" >/dev/null 2>&1
+	then
+            echo "The file contains valid JSON format [SUCCESS]"
+        else
+            echo "The file does not contain valid JSON format [FAILED]"
+            err=1
+	    exit
+        fi
+    else
+        echo "File not found [FAILED]"
+        err=2
+        exit
+    fi
+}
+
+test_json_converter_command
+validate_json_format
+
+exit ${err}
-- 
2.34.1