Started adding test runners.

tests/test_commercial_injection.py

@@ -0,0 +1,17 @@
+import pytest
+import datetime
+
+@pytest.mark.parametrize("commercial, expected", [
+    (["1", "1501900754", "3", "001 - Kit_Kat_Commercial_-_Give_Me_A_Break_1988", "30890", "/library/metadata/3854"], 35890)
+])
+def test_pad_the_commercial_dur(commercial, expected):
+
+    commercial_as_list = list(commercial)
+
+    commercial_as_list[4] = int(commercial_as_list[4]) + (5 * 1000)
+
+    assert int(commercial_as_list[4]) == expected
+
+def test_inject_commercials():
+
+    pass