adding virt checker tests (#960)

Signed-off-by: Paige Patton <prubenda@redhat.com>

tests/run_python_plugin.py

@@ -0,0 +1,37 @@
+import tempfile
+import unittest
+
+from krkn.scenario_plugins.native.run_python_plugin import (
+    RunPythonFileInput,
+    run_python_file,
+)
+
+
+class RunPythonPluginTest(unittest.TestCase):
+    def test_success_execution(self):
+        tmp_file = tempfile.NamedTemporaryFile()
+        tmp_file.write(bytes("print('Hello world!')", "utf-8"))
+        tmp_file.flush()
+        output_id, output_data = run_python_file(
+            params=RunPythonFileInput(tmp_file.name),
+            run_id="test-python-plugin-success",
+        )
+        self.assertEqual("success", output_id)
+        self.assertEqual("Hello world!\n", output_data.stdout)
+
+    def test_error_execution(self):
+        tmp_file = tempfile.NamedTemporaryFile()
+        tmp_file.write(
+            bytes("import sys\nprint('Hello world!')\nsys.exit(42)\n", "utf-8")
+        )
+        tmp_file.flush()
+        output_id, output_data = run_python_file(
+            params=RunPythonFileInput(tmp_file.name), run_id="test-python-plugin-error"
+        )
+        self.assertEqual("error", output_id)
+        self.assertEqual(42, output_data.exit_code)
+        self.assertEqual("Hello world!\n", output_data.stdout)
+
+
+if __name__ == "__main__":
+    unittest.main()