+ # - can_seek_ns_from_origin: returns False
+ # - seek_ns_from_origin provided: Don't care
+ # - can the iterator seek beginning: Yes
+ # - can the iterator seek forward: Yes
+ #
+ # We expect iter.can_seek_ns_from_origin to return True.
+ for user_seek_ns_from_origin_provided in (False, True):
+ self._can_seek_ns_from_origin_test(
+ expected_outcome=True,
+ user_can_seek_ns_from_origin_ret_val=False,
+ user_seek_ns_from_origin_provided=user_seek_ns_from_origin_provided,
+ iter_can_seek_beginning=True,
+ iter_can_seek_forward=True,
+ )
+
+ def test_can_seek_ns_from_origin_returns_false_can_seek_beginning_not_forward_seekable(
+ self
+ ):
+ # Test the case where:
+ #
+ # - can_seek_ns_from_origin: returns False
+ # - seek_ns_from_origin provided: Don't care
+ # - can the iterator seek beginning: Yes
+ # - can the iterator seek forward: No
+ #
+ # We expect iter.can_seek_ns_from_origin to return False.
+ for user_seek_ns_from_origin_provided in (False, True):
+ self._can_seek_ns_from_origin_test(
+ expected_outcome=False,
+ user_can_seek_ns_from_origin_ret_val=False,
+ user_seek_ns_from_origin_provided=user_seek_ns_from_origin_provided,
+ iter_can_seek_beginning=True,
+ iter_can_seek_forward=False,
+ )
+
+ def test_can_seek_ns_from_origin_returns_false_cant_seek_beginning_forward_seekable(
+ self
+ ):
+ # Test the case where:
+ #
+ # - can_seek_ns_from_origin: returns False
+ # - seek_ns_from_origin provided: Don't care
+ # - can the iterator seek beginning: No
+ # - can the iterator seek forward: Yes
+ #
+ # We expect iter.can_seek_ns_from_origin to return False.
+ # for user_seek_ns_from_origin_provided in (False, True):
+ self._can_seek_ns_from_origin_test(
+ expected_outcome=False,
+ user_can_seek_ns_from_origin_ret_val=False,
+ user_seek_ns_from_origin_provided=False,
+ iter_can_seek_beginning=False,
+ iter_can_seek_forward=True,
+ )
+
+ def test_can_seek_ns_from_origin_returns_false_cant_seek_beginning_not_forward_seekable(
+ self
+ ):
+ # Test the case where:
+ #
+ # - can_seek_ns_from_origin: returns False
+ # - seek_ns_from_origin provided: Don't care
+ # - can the iterator seek beginning: No
+ # - can the iterator seek forward: No
+ #
+ # We expect iter.can_seek_ns_from_origin to return False.
+ for user_seek_ns_from_origin_provided in (False, True):
+ self._can_seek_ns_from_origin_test(
+ expected_outcome=False,
+ user_can_seek_ns_from_origin_ret_val=False,
+ user_seek_ns_from_origin_provided=user_seek_ns_from_origin_provided,
+ iter_can_seek_beginning=False,
+ iter_can_seek_forward=False,
+ )
+
+ def test_no_can_seek_ns_from_origin_seek_ns_from_origin(self):
+ # Test the case where:
+ #
+ # - can_seek_ns_from_origin: Not provided
+ # - seek_ns_from_origin provided: Yes
+ # - can the iterator seek beginning: Don't care
+ # - can the iterator seek forward: Don't care
+ #
+ # We expect iter.can_seek_ns_from_origin to return True.
+ for iter_can_seek_beginning in (False, True):
+ for iter_can_seek_forward in (False, True):
+ self._can_seek_ns_from_origin_test(
+ expected_outcome=True,
+ user_can_seek_ns_from_origin_ret_val=None,
+ user_seek_ns_from_origin_provided=True,
+ iter_can_seek_beginning=iter_can_seek_beginning,
+ iter_can_seek_forward=iter_can_seek_forward,
+ )
+
+ def test_no_can_seek_ns_from_origin_no_seek_ns_from_origin_can_seek_beginning_forward_seekable(
+ self
+ ):
+ # Test the case where:
+ #
+ # - can_seek_ns_from_origin: Not provided
+ # - seek_ns_from_origin provided: Not provided
+ # - can the iterator seek beginning: Yes
+ # - can the iterator seek forward: Yes
+ #
+ # We expect iter.can_seek_ns_from_origin to return True.
+ self._can_seek_ns_from_origin_test(
+ expected_outcome=True,
+ user_can_seek_ns_from_origin_ret_val=None,
+ user_seek_ns_from_origin_provided=False,
+ iter_can_seek_beginning=True,
+ iter_can_seek_forward=True,
+ )
+
+ def test_no_can_seek_ns_from_origin_no_seek_ns_from_origin_can_seek_beginning_not_forward_seekable(
+ self
+ ):
+ # Test the case where:
+ #
+ # - can_seek_ns_from_origin: Not provided
+ # - seek_ns_from_origin provided: Not provided
+ # - can the iterator seek beginning: Yes
+ # - can the iterator seek forward: No
+ #
+ # We expect iter.can_seek_ns_from_origin to return False.
+ self._can_seek_ns_from_origin_test(
+ expected_outcome=False,
+ user_can_seek_ns_from_origin_ret_val=None,
+ user_seek_ns_from_origin_provided=False,
+ iter_can_seek_beginning=True,
+ iter_can_seek_forward=False,
+ )
+
+ def test_no_can_seek_ns_from_origin_no_seek_ns_from_origin_cant_seek_beginning_forward_seekable(
+ self
+ ):
+ # Test the case where:
+ #
+ # - can_seek_ns_from_origin: Not provided
+ # - seek_ns_from_origin provided: Not provided
+ # - can the iterator seek beginning: No
+ # - can the iterator seek forward: Yes
+ #
+ # We expect iter.can_seek_ns_from_origin to return False.
+ self._can_seek_ns_from_origin_test(
+ expected_outcome=False,
+ user_can_seek_ns_from_origin_ret_val=None,
+ user_seek_ns_from_origin_provided=False,
+ iter_can_seek_beginning=False,
+ iter_can_seek_forward=True,
+ )
+
+ def test_no_can_seek_ns_from_origin_no_seek_ns_from_origin_cant_seek_beginning_not_forward_seekable(
+ self
+ ):
+ # Test the case where:
+ #
+ # - can_seek_ns_from_origin: Not provided
+ # - seek_ns_from_origin provided: Not provided
+ # - can the iterator seek beginning: No
+ # - can the iterator seek forward: No
+ #
+ # We expect iter.can_seek_ns_from_origin to return False.
+ self._can_seek_ns_from_origin_test(
+ expected_outcome=False,
+ user_can_seek_ns_from_origin_ret_val=None,
+ user_seek_ns_from_origin_provided=False,
+ iter_can_seek_beginning=False,
+ iter_can_seek_forward=False,
+ )
+
+ def _can_seek_ns_from_origin_test(
+ self,
+ expected_outcome,
+ user_can_seek_ns_from_origin_ret_val,
+ user_seek_ns_from_origin_provided,
+ iter_can_seek_beginning,
+ iter_can_seek_forward,
+ ):
+ class MySink(bt2._UserSinkComponent):
+ def __init__(self, config, params, obj):
+ self._add_input_port('in')