kunit: tool: allow generating test results in JSON

Add a --json flag, which when specified generates JSON formatted test
results conforming to the KernelCI API test_group spec[1]. The user can
use the new flag to specify a filename to print the json formatted
results to.

Link[1]: https://api.kernelci.org/schema-test-group.html#post
Signed-off-by: Heidi Fahim <heidifahim@google.com>
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/tools/testing/kunit/kunit_json.py b/tools/testing/kunit/kunit_json.py
new file mode 100644
index 000000000000..624b31b2dbd6
--- /dev/null
+++ b/tools/testing/kunit/kunit_json.py
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Generates JSON from KUnit results according to
+# KernelCI spec: https://github.com/kernelci/kernelci-doc/wiki/Test-API
+#
+# Copyright (C) 2020, Google LLC.
+# Author: Heidi Fahim <heidifahim@google.com>
+
+import json
+import os
+
+import kunit_parser
+
+from kunit_parser import TestStatus
+
+def get_json_result(test_result, def_config, build_dir, json_path):
+	sub_groups = []
+
+	# Each test suite is mapped to a KernelCI sub_group
+	for test_suite in test_result.suites:
+		sub_group = {
+			"name": test_suite.name,
+			"arch": "UM",
+			"defconfig": def_config,
+			"build_environment": build_dir,
+			"test_cases": [],
+			"lab_name": None,
+			"kernel": None,
+			"job": None,
+			"git_branch": "kselftest",
+		}
+		test_cases = []
+		# TODO: Add attachments attribute in test_case with detailed
+		#  failure message, see https://api.kernelci.org/schema-test-case.html#get
+		for case in test_suite.cases:
+			test_case = {"name": case.name, "status": "FAIL"}
+			if case.status == TestStatus.SUCCESS:
+				test_case["status"] = "PASS"
+			elif case.status == TestStatus.TEST_CRASHED:
+				test_case["status"] = "ERROR"
+			test_cases.append(test_case)
+		sub_group["test_cases"] = test_cases
+		sub_groups.append(sub_group)
+	test_group = {
+		"name": "KUnit Test Group",
+		"arch": "UM",
+		"defconfig": def_config,
+		"build_environment": build_dir,
+		"sub_groups": sub_groups,
+		"lab_name": None,
+		"kernel": None,
+		"job": None,
+		"git_branch": "kselftest",
+	}
+	json_obj = json.dumps(test_group, indent=4)
+	if json_path != 'stdout':
+		with open(json_path, 'w') as result_path:
+			result_path.write(json_obj)
+		root = __file__.split('tools/testing/kunit/')[0]
+		kunit_parser.print_with_timestamp(
+			"Test results stored in %s" %
+			os.path.join(root, result_path.name))
+	return json_obj