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-rw-r--r--test/functional/eval/json_functions_spec.lua9
1 files changed, 9 insertions, 0 deletions
diff --git a/test/functional/eval/json_functions_spec.lua b/test/functional/eval/json_functions_spec.lua
index 0b0403ce8e..33d177a2b6 100644
--- a/test/functional/eval/json_functions_spec.lua
+++ b/test/functional/eval/json_functions_spec.lua
@@ -472,6 +472,15 @@ describe('json_encode() function', function()
eq('1.0e50', eval('json_encode(1.0e50)'))
end)
+ it('fails to dump NaN and infinite values', function()
+ eq('Vim(call):E474: Unable to represent NaN value in JSON',
+ exc_exec('call json_encode(str2float("nan"))'))
+ eq('Vim(call):E474: Unable to represent infinity in JSON',
+ exc_exec('call json_encode(str2float("inf"))'))
+ eq('Vim(call):E474: Unable to represent infinity in JSON',
+ exc_exec('call json_encode(-str2float("inf"))'))
+ end)
+
it('dumps lists', function()
eq('[]', funcs.json_encode({}))
eq('[[]]', funcs.json_encode({{}}))