Invoke the runners under exit-0 conditions in tests

This is designed to simply ensure that the runners exist and haven't
been broken or changed in unexpected ways by refactors.

Whilst linting may catch changes, having a test that ensures the current
behaviour is captured ensures any changes are more likely to be intentional.

1 files changed, 47 insertions, 0 deletions

diff --git a/tests/test_pylint_runners.py b/tests/test_pylint_runners.py
new file mode 100644
index 000000000..7b92ddcba
--- /dev/null
+++ b/tests/test_pylint_runners.py
@@ -0,0 +1,47 @@
+""" Here we test the executable iterfaces shipped with pylint """
+import os
+import sys
+import unittest
+from unittest.mock import patch
+
+from pylint import run_pylint, run_epylint, run_pyreverse, run_symilar
+
+
+class TestRunners(unittest.TestCase):
+    """ A tester to ensure that the runners we ship execute with minimal params """
+
+    def test_run_pylint(self):
+        """ Tests basic invocation of the pylint setup via the runner func """
+        filepath = os.path.abspath(__file__)
+        testargs = ["", filepath]
+        with patch.object(sys, "argv", testargs):
+            with self.assertRaises(SystemExit) as err:
+                run_pylint()
+            self.assertEqual(0, err.exception.code)
+
+    def test_run_epylint(self):
+        """ Tests basic invocation of the epylint setup via its runner func """
+        filepath = os.path.abspath(__file__)
+        testargs = ["", filepath]
+        with patch.object(sys, "argv", testargs):
+            with self.assertRaises(SystemExit) as err:
+                run_epylint()
+            self.assertEqual(0, err.exception.code)
+
+    def test_run_pyreverse(self):
+        """ Tests basic invocation of pyreverse """
+        filepath = os.path.abspath(__file__)
+        testargs = ["", filepath]
+        with patch.object(sys, "argv", testargs):
+            with self.assertRaises(SystemExit) as err:
+                run_pyreverse()
+            self.assertEqual(0, err.exception.code)
+
+    def test_run_symilar(self):
+        """ Tests basic invocation of the similar utilities via its runner func  """
+        filepath = os.path.abspath(__file__)
+        testargs = ["", filepath]
+        with patch.object(sys, "argv", testargs):
+            with self.assertRaises(SystemExit) as err:
+                run_symilar()
+            self.assertEqual(0, err.exception.code)