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diff src/testdir/test_vim9_builtin.vim @ 23816:525c9e218c69

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patch 8.2.2449: Vim9: flatten() always changes the list type Commit: https://github.com/vim/vim/commit/3b690069730805a147d45d92eaca4dc838272d1d Author: Bram Moolenaar <Bram@vim.org> Date: Mon Feb 1 20:14:51 2021 +0100 patch 8.2.2449: Vim9: flatten() always changes the list type Problem: Vim9: flatten() always changes the list type. Solution: Disallow using flatten() and add flattennew().
author Bram Moolenaar <Bram@vim.org>
date Mon, 01 Feb 2021 20:15:04 +0100
parents 007fa6365dfb
children 7e0d8f1cae7d
line wrap: on
line diff
--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -382,6 +382,23 @@ def Test_findfile()
   CheckDefExecFailure(['echo findfile("")'], 'E1142:')
 enddef
 
+def Test_flattennew()
+  var lines =<< trim END
+      var l = [1, [2, [3, 4]], 5]
+      call assert_equal([1, 2, 3, 4, 5], flattennew(l))
+      call assert_equal([1, [2, [3, 4]], 5], l)
+
+      call assert_equal([1, 2, [3, 4], 5], flattennew(l, 1))
+      call assert_equal([1, [2, [3, 4]], 5], l)
+  END
+  CheckDefAndScriptSuccess(lines)
+
+  lines =<< trim END
+      echo flatten([1, 2, 3])
+  END
+  CheckDefAndScriptFailure(lines, 'E1158:')
+enddef
+
 def Test_fnamemodify()
   CheckDefSuccess(['echo fnamemodify(test_null_string(), ":p")'])
   CheckDefSuccess(['echo fnamemodify("", ":p")'])