Fix issue #168: intervals greater than one day were incorrect.

maya/core.py

@@ -806,4 +806,6 @@ def intervals(start, end, interval):
     while current_timestamp.epoch < end.epoch:
         yield current_timestamp
 
-        current_timestamp = current_timestamp.add(seconds=interval.seconds)
+        current_timestamp = current_timestamp.add(
+            seconds=interval.total_seconds()
+        )

tests/test_maya_interval.py

@@ -570,3 +570,16 @@ def test_interval_from_iso8601_duration():
 
     assert interval.start == s
     assert interval.end == e
+
+
+def test_issue_168_regression():
+    start = maya.now()
+    end = start.add(weeks=1)
+    gen = maya.intervals(start=start, end=end, interval=60 * 60 * 24)
+    # Since the bug causes the generator to never end, first sanity
+    # check that two results are not the same.
+    assert next(gen) != next(gen)
+    assert (
+        len(list(maya.intervals(start=start, end=end, interval=60 * 60 * 24)))
+        == 7
+    )