Jan Edmund Lazo 0d0eeff8a3 eval: add v:_null_string ...

Replacement for Vim's test_null_string().
Vim uses it to verify that its codebase handles null strings.
Preparation for the Test_null_list() in patch v8.2.1822.

Use v:_null_string, not non-existent env var, for null string tests.

Mention v:_null_string in id() because id(v:_null_string) returns (nil).

2021-04-08 22:36:20 -04:00

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api_functions_spec.lua

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backtick_expansion_spec.lua

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buf_functions_spec.lua

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changedtick_spec.lua

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container_functions_spec.lua

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ctx_functions_spec.lua

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environ_spec.lua

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executable_spec.lua

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execute_spec.lua

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exepath_spec.lua

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fnamemodify_spec.lua

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function_spec.lua

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getline_spec.lua

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glob_spec.lua

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has_spec.lua

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hostname_spec.lua

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input_spec.lua

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interrupt_spec.lua

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json_functions_spec.lua

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let_spec.lua

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map_functions_spec.lua

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match_functions_spec.lua

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minmax_functions_spec.lua

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modeline_spec.lua

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msgpack_functions_spec.lua

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null_spec.lua

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operators_spec.lua

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printf_spec.lua

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reltime_spec.lua

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server_spec.lua

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setpos_spec.lua

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sort_spec.lua

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special_vars_spec.lua

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string_spec.lua

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system_spec.lua

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timer_spec.lua

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uniq_spec.lua

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vvar_event_spec.lua

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wait_spec.lua

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writefile_spec.lua

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