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-rw-r--r--src/testdir/test_vim9_import.vim16
1 files changed, 16 insertions, 0 deletions
diff --git a/src/testdir/test_vim9_import.vim b/src/testdir/test_vim9_import.vim
index 61184a1f48..3067ef6c9e 100644
--- a/src/testdir/test_vim9_import.vim
+++ b/src/testdir/test_vim9_import.vim
@@ -3311,4 +3311,20 @@ def Test_import_from_vimrc()
delete('Xoutput.log')
enddef
+" Test for changing a locked imported variable
+def Test_import_locked_var()
+ var lines =<< trim END
+ vim9script
+ export var Foo: number = 10
+ lockvar Foo
+ END
+ writefile(lines, 'Ximportlockedvar.vim', 'D')
+ lines =<< trim END
+ vim9script
+ import './Ximportlockedvar.vim' as Bar
+ Bar.Foo = 20
+ END
+ v9.CheckScriptFailure(lines, 'E741: Value is locked: Foo', 3)
+enddef
+
" vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker