Clean-up return statements

Also increase coverage of main function

Change-Id: I9f92c9c6d2141fd601f45b99facd24f53931b27e

bashate/bashate.py

@@ -78,16 +78,11 @@ def check_function_decl(line, report):
 
 def starts_multiline(line):
     m = re.search("[^<]<<\s*(?P<token>\w+)", line)
-    if m:
-        return m.group('token')
-    else:
-        return False
+    return m.group('token') if m else False
 
 
 def end_of_multiline(line, token):
-    if token:
-        return re.search("^%s\s*$" % token, line) is not None
-    return False
+    return token and re.search("^%s\s*$" % token, line)
 
 
 def check_arithmetic(line, report):
@@ -238,11 +233,10 @@ def main():
         print("bashate: %s" % e)
         return 1
 
-    if run.ERRORS > 0:
+    if run.ERRORS:
         print("%d bashate error(s) found" % run.ERRORS)
         return 1
-    else:
-        return 0
+    return 0
 
 
 if __name__ == "__main__":

bashate/tests/test_bashate.py

@@ -29,6 +29,60 @@ class TestBashate(base.TestCase):
         super(TestBashate, self).setUp()
         self.run = bashate.BashateRun()
 
+    @mock.patch('argparse.ArgumentParser')
+    @mock.patch('bashate.bashate.BashateRun')
+    def test_main_no_files(self, m_bashaterun, m_argparser):
+        m_opts = mock.MagicMock()
+        m_opts.files = []
+        m_parser_obj = mock.MagicMock()
+        m_parser_obj.parse_args = mock.Mock(return_value=m_opts)
+        m_argparser.return_value = m_parser_obj
+
+        m_run_obj = mock.MagicMock()
+        m_run_obj.ERRORS = 0
+        m_bashaterun.return_value = m_run_obj
+
+        result = bashate.main()
+
+        m_parser_obj.print_usage.assert_called_once_with()
+        expected_return = 1
+        self.assertEqual(expected_return, result)
+
+    @mock.patch('argparse.ArgumentParser')
+    @mock.patch('bashate.bashate.BashateRun')
+    def test_main_return_one_on_errors(self, m_bashaterun, m_argparser):
+        m_opts = mock.MagicMock()
+        m_opts.files = 'not_a_file'
+        m_parser_obj = mock.MagicMock()
+        m_parser_obj.parse_args = mock.Mock(return_value=m_opts)
+        m_argparser.return_value = m_parser_obj
+
+        m_run_obj = mock.MagicMock()
+        m_run_obj.ERRORS = 1
+        m_bashaterun.return_value = m_run_obj
+
+        result = bashate.main()
+        expected_return = 1
+        self.assertEqual(expected_return, result)
+
+    @mock.patch('argparse.ArgumentParser')
+    @mock.patch('bashate.bashate.BashateRun')
+    def test_main_return_one_on_ioerror(self, m_bashaterun, m_argparser):
+        m_opts = mock.MagicMock()
+        m_opts.files = 'not_a_file'
+        m_parser_obj = mock.MagicMock()
+        m_parser_obj.parse_args = mock.Mock(return_value=m_opts)
+        m_argparser.return_value = m_parser_obj
+
+        m_run_obj = mock.MagicMock()
+        m_run_obj.ERRORS = 0
+        m_run_obj.check_files = mock.Mock(side_effect=IOError)
+        m_bashaterun.return_value = m_run_obj
+
+        result = bashate.main()
+        expected_return = 1
+        self.assertEqual(expected_return, result)
+
     def test_multi_ignore_with_slash(self):
         self.run.register_ignores('E001|E011')
         bashate.check_no_trailing_whitespace("if ", self.run)