add papermill test

Author: djherbis

tests/test_papermill.py

@@ -0,0 +1,14 @@
+import unittest
+
+import subprocess
+
+class TestPapermill(unittest.TestCase):
+    def test_papermill(self):
+        result = subprocess.run([
+            'papermill',
+            '/input/tests/data/notebook.ipynb',
+            '-',
+        ], stdout=subprocess.PIPE)
+
+        self.assertEqual(0, result.returncode)
+        self.assertTrue(b'999' in result.stdout)