--- a/test/ChangeLog
+++ b/test/ChangeLog
@@ -1,3 +1,7 @@
+2008-09-26  Jaroslav Hajek <highegg@gmail.com>
+
+	* test_null_assign.m: More test for null assignments.
+
 2008-09-18  Jaroslav Hajek  <highegg@gmail.com>
 
 	* test_null_assign.m: New tests.

--- a/test/test_null_assign.m
+++ b/test/test_null_assign.m
@@ -33,3 +33,31 @@
 %!test
 %! a = ones (3); fail ("a(1:3,1:3) = []", ".*");
 
+% null strings should delete. [,] and [;] should delete.
+%!test
+%! a = ones (3); a(1:2,:) = [,]; assert (size (a), [1,3])
+%!test
+%! a = ones (3); a(1:2,:) = [;]; assert (size (a), [1,3])
+%!test
+%! a = ones (3); a(1:2,:) = ''; assert (size (a), [1,3])
+%!test
+%! a = ones (3); a(1:2,:) = ""; assert (size (a), [1,3])
+
+% null matrix stored anywhere should lose its special status
+%!test
+%! a = ones (3); b = []; fail ("a(:,1:3) = b", ".")
+%!test
+%! a = ones (3); b{1} = []; fail ("a(:,1:3) = b{1}", ".")
+%!test
+%! a = ones (3); b.x = []; fail ("a(:,1:3) = b.x", ".")
+
+% filtering a null matrix through a function should not delete
+%!test
+%! a = ones (3); fail ("a(:,1:3) = double ([])")
+
+% subsasgn should work the same way
+%!test
+%! a = ones (3); subsasgn (a, substruct ('()', {':',1:2}), []); assert (size (a), [3,1])
+%!test
+%! a = ones (3); b = []; fail ("subsasgn (a, substruct ('()', {':',1:2}), b)", ".")
+