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path: root/test/functional/vimscript/container_functions_spec.lua
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local t = require('test.testutil')
local n = require('test.functional.testnvim')()

local eq = t.eq
local eval = n.eval
local api = n.api
local clear = n.clear

before_each(clear)

describe('extend()', function()
  it('succeeds to extend list with itself', function()
    api.nvim_set_var('l', { 1, {} })
    eq({ 1, {}, 1, {} }, eval('extend(l, l)'))
    eq({ 1, {}, 1, {} }, api.nvim_get_var('l'))

    api.nvim_set_var('l', { 1, {} })
    eq({ 1, {}, 1, {} }, eval('extend(l, l, 0)'))
    eq({ 1, {}, 1, {} }, api.nvim_get_var('l'))

    api.nvim_set_var('l', { 1, {} })
    eq({ 1, 1, {}, {} }, eval('extend(l, l, 1)'))
    eq({ 1, 1, {}, {} }, api.nvim_get_var('l'))
  end)
end)