The current validation only checked for the
number of elements in the volume-spec, however,
did not validate if the elements were empty.
Because of this, an empty volume-spec (""),
or volume spec only containing separators ("::")
would not be invalidated.
This adds a simple check for empty elements in
the volume-spec, and returns an error if
the spec is invalid.
A unit-test is also added to verify the behavior.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: 120241937e67238fd98b839886751bda70129ba8
Component: engine
1ad841b29e