add ut for meson scanner

unittest/test_meson_scanner.py

@@ -0,0 +1,70 @@
+"""
+SPDX-License-Identifier: Apache-2.0
+Copyright (c) 2023, Ampere Computing LLC
+"""
+
+import io
+import unittest
+from src.advisor.reports.report import Report
+from src.advisor.scanners.meson_scanner import MesonScanner
+
+
+class TestMesonScanner(unittest.TestCase):
+    def test_accepts_file(self):
+        meson_scanner = MesonScanner()
+        self.assertFalse(meson_scanner.accepts_file('test'))
+        self.assertTrue(meson_scanner.accepts_file('meson.build'))
+
+    def test_scan_file_object(self):
+        meson_scanner = MesonScanner()
+        report = Report('/root')
+        io_object = io.StringIO('xxx')
+        meson_scanner.scan_file_object(
+            'meson.build', io_object, report)
+        self.assertEqual(len(report.issues), 0)
+
+
+    def test_arch_specific_libs_re(self):
+        match = MesonScanner.ARCH_SPECIFIC_LIBS_RE_PROG.search("cc.find_library('foo')")
+        self.assertIsNone(match)
+        match = MesonScanner.ARCH_SPECIFIC_LIBS_RE_PROG.search("cc.find_library('otherarch')")
+        self.assertIsNotNone(match)
+        self.assertEqual(match.group(1), "otherarch")
+
+    def test_arch_specific_libs(self):
+        meson_scanner = MesonScanner()
+        report = Report('/root')
+        io_object = io.StringIO("cc.find_library('otherarch')")
+        meson_scanner.scan_file_object(
+            'meson.build', io_object, report)
+        self.assertEqual(len(report.issues), 1)
+
+    def test_neoverse_specific_opts_line_re(self):
+        match = MesonScanner.NEOVERSE_SPECIFIC_OPTS_RE_PROG.search("'compiler_options':  ['-mcpu=ampere1a'],")
+        self.assertIsNone(match)
+        match = MesonScanner.NEOVERSE_SPECIFIC_OPTS_RE_PROG.search("'compiler_options':  ['-mcpu=neoverse-n2'],")
+        self.assertIsNotNone(match)
+
+    def test_ampereone_specific_opts_line_re(self):
+        match = MesonScanner.AMPEREONE_SPECIFIC_OPTS_RE_PROG.search("'compiler_options':  ['-mcpu=neoverse-n2'],")
+        self.assertIsNone(match)
+        match = MesonScanner.AMPEREONE_SPECIFIC_OPTS_RE_PROG.search("'compiler_options':  ['-mcpu=ampere1a'],")
+        self.assertIsNotNone(match)
+
+    def test_neoverse_specific_opts_line(self):
+        meson_scanner = MesonScanner()
+
+        report = Report('/root')
+        io_object = io.StringIO("'compiler_options':  ['-mcpu=neoverse-n2'],")
+        meson_scanner.scan_file_object(
+            'meson.build', io_object, report)
+        # Should report 2 issues, one for neoverse flag indication, another for ampereone flag missing.
+        self.assertEqual(len(report.issues), 2)
+
+        report = Report('/root')
+        io_object = io.StringIO("'compiler_options':  ['-mcpu=ampere1a'],\n'compiler_options':  ['-mtune=ampere1a'],\n'compiler_options':  ['-mcpu=neoverse-v2'],\n'compiler_options':  ['-mtune=neoverse-v2'],\n")
+        meson_scanner.scan_file_object(
+            'meson.build', io_object, report)
+        self.assertEqual(len(report.issues), 2)
+
+