vim/after/plugin/snips.lua

local has_luasnip, luasnip = pcall(require, 'luasnip')
if not has_luasnip then
  return
end

local ls = luasnip
local s = ls.snippet
-- local sn = ls.snippet_node
-- local isn = ls.indent_snippet_node
local t = ls.text_node
local i = ls.insert_node
local f = ls.function_node
local c = ls.choice_node
-- local d = ls.dynamic_node
-- local r = ls.restore_node
-- local events = require("luasnip.util.events")
-- local ai = require("luasnip.nodes.absolute_indexer")
local extras = require 'luasnip.extras'
-- local l = extras.lambda
local rep = extras.rep
-- local p = extras.partial
-- local m = extras.match
-- local n = extras.nonempty
-- local dl = extras.dynamic_lambda
local fmt = require('luasnip.extras.fmt').fmt
-- local fmta = require("luasnip.extras.fmt").fmta
-- local conds = require("luasnip.extras.expand_conditions")
-- local postfix = require("luasnip.extras.postfix").postfix
-- local types = require("luasnip.util.types")
-- local parse = require("luasnip.util.parser").parse_snippet
--
--

ls.config.set_config {
  history = true,
  updateevents = 'TextChanged,TextChangedI',
}

local snippets = {
  all = {
    s(
      'timestamp',
      f(function()
        return os.date '%Y-%m-%d %H:%M'
      end)
    ),
  },
  lua = {
    s('hey', c(1, { t 'hey ho', t 'hoi' })),
    s(
      { trig = 'prequire', name = 'pcall require' },
      fmt(
        [[
        local has_{}, {} = pcall(require, '{}')
        if not has_{} then
          return
        end
        {}
        ]],
        { rep(1), rep(1), i(1), rep(1), i(0) }
      )
    ),
  },
  javascript = {
    s(
      { trig = 'des', name = 'describe' },
      fmt(
        [[
        describe("{}", () => {{
          {}
        }});
        ]],
        { i(1), i(0) }
      )
    ),
    s(
      { trig = 'it', name = 'it' },
      fmt(
        [[
        it("{}", () => {{
          {}
        }});
        ]],
        { i(1), i(0) }
      )
    ),
    s(
      { trig = 'bfe', name = 'beforeEach' },
      fmt(
        [[
        beforeEach(() => {{
          {}
        }});
        ]],
        { i(0) }
      )
    ),
    s(
      { trig = 'bf', name = 'beforeX' },
      fmt(
        [[
        before{}(() => {{
          {}
        }});
        ]],
        { c(1, { t 'Each', t 'All' }), i(0) }
      )
    ),
    s(
      { trig = 'afe', name = 'afterEach' },
      fmt(
        [[
        afterEach(() => {{
          {}
        }});
        ]],
        { i(0) }
      )
    ),
    s(
      { trig = 'egbr', name = 'expect getByRole' },
      fmt(
        [[
        expect(screen.getByRole('{}', {{ name: /{}/i}})).{}
        ]],
        { i(1, 'heading'), i(2), i(0) }
      )
    ),
    s(
      { trig = 'tbid', name = 'toBeInDocument()' },
      fmt(
        [[
        toBeInDocument();
        {}
        ]],
        { i(0) }
      )
    ),
  },
}

ls.add_snippets(nil, snippets, { key = 'my-snips' })