vim-patch:8.2.{1949,2781} (#22451)

vim-patch:8.2.2781: add() silently skips when adding to null list or blob

Problem:    Add() silently skips when adding to null list or blob.
Solution:   Give an error in Vim9 script.  Allocate blob when it is NULL like
            with list and dict.

b7c21afef1

Do not implicitly change a NULL blob/dict/list to an empty one.

N/A patches for version.c:

vim-patch:8.2.1949: Vim9: using extend() on null dict is silently ignored

Problem:    Vim9: using extend() on null dict is silently ignored.
Solution:   Give an error message.  Initialize a dict variable with an empty
            dictionary. (closes vim/vim#7251)

348be7ed07

N/A because Nvim's current behavior is an error message as a locked
list/dict, which is more consistent. Ref #4615.

Co-authored-by: Bram Moolenaar <Bram@vim.org>

src/nvim/testdir/test_blob.vim

@@ -317,27 +317,59 @@ func Test_blob_for_loop()
 endfunc
 
 func Test_blob_concatenate()
-  let b = 0z0011
+  let lines =<< trim END
-  let b += 0z2233
+      VAR b = 0z0011
-  call assert_equal(0z00112233, b)
+      LET b += 0z2233
+      call assert_equal(0z00112233, b)
 
-  call assert_fails('let b += "a"')
+      LET b = 0zDEAD + 0zBEEF
-  call assert_fails('let b += 88')
+      call assert_equal(0zDEADBEEF, b)
+  END
+  call CheckLegacyAndVim9Success(lines)
 
-  let b = 0zDEAD + 0zBEEF
+  let lines =<< trim END
-  call assert_equal(0zDEADBEEF, b)
+      VAR b = 0z0011
+      LET b += "a"
+  END
+  call CheckLegacyAndVim9Failure(lines, ['E734:', 'E1012:', 'E734:'])
+
+  let lines =<< trim END
+      VAR b = 0z0011
+      LET b += 88
+  END
+  call CheckLegacyAndVim9Failure(lines, ['E734:', 'E1012:', 'E734:'])
 endfunc
 
 func Test_blob_add()
+  let lines =<< trim END
+      VAR b = 0z0011
+      call add(b, 0x22)
+      call assert_equal(0z001122, b)
+  END
+  call CheckLegacyAndVim9Success(lines)
+
+  " Only works in legacy script
   let b = 0z0011
-  call add(b, 0x22)
-  call assert_equal(0z001122, b)
   call add(b, '51')
-  call assert_equal(0z00112233, b)
+  call assert_equal(0z001133, b)
   call assert_equal(1, add(v:_null_blob, 0x22))
 
-  call assert_fails('call add(b, [9])', 'E745:')
+  let lines =<< trim END
-  call assert_fails('call add("", 0x01)', 'E897:')
+      VAR b = 0z0011
+      call add(b, [9])
+  END
+  call CheckLegacyAndVim9Failure(lines, ['E745:', 'E1012:', 'E745:'])
+
+  let lines =<< trim END
+      VAR b = 0z0011
+      call add("", 0x01)
+  END
+  call CheckLegacyAndVim9Failure(lines, 'E897:')
+
+  let lines =<< trim END
+      add(v:_null_blob, 0x22)
+  END
+  call CheckDefExecAndScriptFailure(lines, 'E1131:')
 endfunc
 
 func Test_blob_empty()