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local helpers = require('test.functional.helpers')(after_each)
local clear = helpers.clear
local eq = helpers.eq
local command = helpers.command
local exec_lua = helpers.exec_lua
local pcall_err = helpers.pcall_err
local matches = helpers.matches
local insert = helpers.insert
before_each(clear)
describe('treesitter language API', function()
-- error tests not requiring a parser library
it('handles missing language', function()
eq(
".../language.lua:0: no parser for 'borklang' language, see :help treesitter-parsers",
pcall_err(exec_lua, "parser = vim.treesitter.get_parser(0, 'borklang')")
)
-- actual message depends on platform
matches(
"Failed to load parser for language 'borklang': uv_dlopen: .+",
pcall_err(
exec_lua,
"parser = vim.treesitter.language.add('borklang', { path = 'borkbork.so' })"
)
)
eq(false, exec_lua("return pcall(vim.treesitter.language.add, 'borklang')"))
eq(
false,
exec_lua("return pcall(vim.treesitter.language.add, 'borklang', { path = 'borkbork.so' })")
)
eq(
".../language.lua:0: no parser for 'borklang' language, see :help treesitter-parsers",
pcall_err(exec_lua, "parser = vim.treesitter.language.inspect('borklang')")
)
matches(
'Failed to load parser: uv_dlsym: .+',
pcall_err(exec_lua, 'vim.treesitter.language.add("c", { symbol_name = "borklang" })')
)
end)
it('shows error for invalid language name', function()
eq(
".../language.lua:0: '/foo/' is not a valid language name",
pcall_err(exec_lua, 'vim.treesitter.language.add("/foo/")')
)
end)
it('inspects language', function()
local keys, fields, symbols = unpack(exec_lua([[
local lang = vim.treesitter.language.inspect('c')
local keys, symbols = {}, {}
for k,_ in pairs(lang) do
keys[k] = true
end
-- symbols array can have "holes" and is thus not a valid msgpack array
-- but we don't care about the numbers here (checked in the parser test)
for _, v in pairs(lang.symbols) do
table.insert(symbols, v)
end
return {keys, lang.fields, symbols}
]]))
eq({ fields = true, symbols = true, _abi_version = true }, keys)
local fset = {}
for _, f in pairs(fields) do
eq('string', type(f))
fset[f] = true
end
eq(true, fset['directive'])
eq(true, fset['initializer'])
local has_named, has_anonymous
for _, s in pairs(symbols) do
eq('string', type(s[1]))
eq('boolean', type(s[2]))
if s[1] == 'for_statement' and s[2] == true then
has_named = true
elseif s[1] == '|=' and s[2] == false then
has_anonymous = true
end
end
eq({ true, true }, { has_named, has_anonymous })
end)
it(
'checks if vim.treesitter.get_parser tries to create a new parser on filetype change',
function()
command('set filetype=c')
-- Should not throw an error when filetype is c
eq('c', exec_lua('return vim.treesitter.get_parser(0):lang()'))
command('set filetype=borklang')
-- Should throw an error when filetype changes to borklang
eq(
".../language.lua:0: no parser for 'borklang' language, see :help treesitter-parsers",
pcall_err(exec_lua, "new_parser = vim.treesitter.get_parser(0, 'borklang')")
)
end
)
it('retrieve the tree given a range', function()
insert([[
int main() {
int x = 3;
}]])
exec_lua([[
langtree = vim.treesitter.get_parser(0, "c")
tree = langtree:tree_for_range({1, 3, 1, 3})
]])
eq('<node translation_unit>', exec_lua('return tostring(tree:root())'))
end)
it('retrieve the node given a range', function()
insert([[
int main() {
int x = 3;
}]])
exec_lua([[
langtree = vim.treesitter.get_parser(0, "c")
node = langtree:named_node_for_range({1, 3, 1, 3})
]])
eq('<node primitive_type>', exec_lua('return tostring(node)'))
end)
end)
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