[test] Test Smatch Output with sample output file

- Smatch Parser is tested with sample.c and sample.out files

tools/report-converter/tests/unit/smatch_output_test_files/files/sample.c

@@ -0,0 +1,5 @@
+static struct parse_smatch *check_sample(){
+			int res;
+			res = 0;
+			return ERR_PTR(res);
+		}

tools/report-converter/tests/unit/smatch_output_test_files/sample.expected.plist

@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>diagnostics</key>
+	<array>
+		<dict>
+			<key>category</key>
+			<string>unknown</string>
+			<key>check_name</key>
+			<string>smatch</string>
+			<key>description</key>
+			<string>check_sample() warn: passing zero to 'ERR_PTR'</string>
+			<key>issue_hash_content_of_line_in_context</key>
+			<string>4b7ca471f46a9a22d294b3e6e3676131</string>
+			<key>location</key>
+			<dict>
+				<key>col</key>
+				<integer>0</integer>
+				<key>file</key>
+				<integer>0</integer>
+				<key>line</key>
+				<integer>4</integer>
+			</dict>
+			<key>path</key>
+			<array>
+				<dict>
+					<key>depth</key>
+					<integer>0</integer>
+					<key>kind</key>
+					<string>event</string>
+					<key>location</key>
+					<dict>
+						<key>col</key>
+						<integer>0</integer>
+						<key>file</key>
+						<integer>0</integer>
+						<key>line</key>
+						<integer>4</integer>
+					</dict>
+					<key>message</key>
+					<string>check_sample() warn: passing zero to 'ERR_PTR'</string>
+				</dict>
+			</array>
+			<key>type</key>
+			<string>smatch</string>
+		</dict>
+	</array>
+	<key>files</key>
+	<array>
+		<string>files/sample.c</string>
+	</array>
+	<key>metadata</key>
+	<dict>
+		<key>analyzer</key>
+		<dict>
+			<key>name</key>
+			<string>smatch</string>
+		</dict>
+		<key>generated_by</key>
+		<dict>
+			<key>name</key>
+			<string>report-converter</string>
+			<key>version</key>
+			<string>x.y.z</string>
+		</dict>
+	</dict>
+</dict>
+</plist>

tools/report-converter/tests/unit/smatch_output_test_files/sample.out

@@ -0,0 +1 @@
+files/sample.c:4 check_sample() warn: passing zero to 'ERR_PTR'

tools/report-converter/tests/unit/test_smatch_parser.py

@@ -0,0 +1,79 @@
+# -------------------------------------------------------------------------
+#
+#  Part of the CodeChecker project, under the Apache License v2.0 with
+#  LLVM Exceptions. See LICENSE for license information.
+#  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+# -------------------------------------------------------------------------
+
+"""
+This module tests the correctness of the SmatchAnalyzerResult, which
+used in sequence transform Smatch output to a plist file.
+"""
+
+
+import os
+import plistlib
+import shutil
+import tempfile
+import unittest
+
+
+from codechecker_report_converter.smatch.analyzer_result import \
+    SmatchAnalyzerResult
+
+
+class SmatchAnalyzerResultTestCase(unittest.TestCase):
+    """ Test the output of the SmatchAnalyzerResult. """
+
+    def setUp(self):
+        """ Setup the test. """
+        self.analyzer_result = SmatchAnalyzerResult()
+        self.cc_result_dir = tempfile.mkdtemp()
+        self.test_files = os.path.join(os.path.dirname(__file__),
+                                       'smatch_output_test_files')
+
+    def tearDown(self):
+        """ Clean temporary directory. """
+        shutil.rmtree(self.cc_result_dir)
+
+    def test_no_smatch_output_file(self):
+        """ Test transforming single C file. """
+        analyzer_result = os.path.join(self.test_files, 'files',
+                                       'sample.c')
+
+        ret = self.analyzer_result.transform(analyzer_result,
+                                             self.cc_result_dir)
+        self.assertFalse(ret)
+
+    def test_transform_dir(self):
+        """ Test transforming a directory. """
+        analyzer_result = os.path.join(self.test_files)
+
+        ret = self.analyzer_result.transform(analyzer_result,
+                                             self.cc_result_dir)
+        self.assertFalse(ret)
+
+    def test_transform_single_file(self):
+        """ Test transforming single output file. """
+        analyzer_result = os.path.join(self.test_files, 'sample.out')
+        self.analyzer_result.transform(analyzer_result, self.cc_result_dir)
+
+        plist_file = os.path.join(self.cc_result_dir,
+                                  'sample.c_smatch.plist')
+
+        with open(plist_file, mode='rb') as pfile:
+            res = plistlib.load(pfile)
+
+            # Use relative path for this test.
+            res['files'][0] = os.path.join('files', 'sample.c')
+
+            self.assertTrue(res['metadata']['generated_by']['version'])
+            res['metadata']['generated_by']['version'] = "x.y.z"
+
+        plist_file = os.path.join(self.test_files,
+                                  'sample.expected.plist')
+        with open(plist_file, mode='rb') as pfile:
+            exp = plistlib.load(pfile)
+
+        self.assertEqual(res, exp)