added a couple more cron tests based on croniter features

Author: craigbarratt

tests/test_unit_trigger.py

@@ -327,6 +327,42 @@ def test_timer_active_check(hass, spec, now, expected):
             dt(2019, 9, 14, 8, 23, 0, 0),
         ],
     ],
+    [
+        # test "/n"
+        ["cron(*/10 14 * * *)"],
+        [
+            dt(2019, 9, 1, 14, 0, 0, 0),
+            dt(2019, 9, 1, 14, 10, 0, 0),
+            dt(2019, 9, 1, 14, 20, 0, 0),
+            dt(2019, 9, 1, 14, 30, 0, 0),
+            dt(2019, 9, 1, 14, 40, 0, 0),
+            dt(2019, 9, 1, 14, 50, 0, 0),
+            dt(2019, 9, 2, 14, 0, 0, 0),
+            dt(2019, 9, 2, 14, 10, 0, 0),
+        ],
+    ],
+    [
+        # test "/n" spanning 2 hours
+        ["cron(*/30 14-15 * * *)"],
+        [
+            dt(2019, 9, 1, 14, 0, 0, 0),
+            dt(2019, 9, 1, 14, 30, 0, 0),
+            dt(2019, 9, 1, 15, 0, 0, 0),
+            dt(2019, 9, 1, 15, 30, 0, 0),
+            dt(2019, 9, 2, 14, 0, 0, 0),
+            dt(2019, 9, 2, 14, 30, 0, 0),
+        ],
+    ],
+    [
+        # test optional 6th argument seconds
+        ["cron(0 14 * * * 10,35)"],
+        [
+            dt(2019, 9, 1, 14, 0, 10, 0),
+            dt(2019, 9, 1, 14, 0, 35, 0),
+            dt(2019, 9, 2, 14, 0, 10, 0),
+            dt(2019, 9, 2, 14, 0, 35, 0),
+        ],
+    ],
     [
         # invalid cron expression returns None
         ["cron(0 14 1-2-3 x *)"],