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https://github.com/neovim/neovim.git
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50a03c0e99
Unfortunately the gc=false objects can refer to a dangling tree if the gc=true tree was freed first. This reuses the same tree object as the node itself is keeping alive via the uservalue of the node userdata. (wrapped in a table due to lua 5.1 restrictions)
133 lines
3.1 KiB
Lua
133 lines
3.1 KiB
Lua
local helpers = require('test.functional.helpers')(after_each)
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local clear = helpers.clear
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local eq = helpers.eq
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local exec_lua = helpers.exec_lua
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local insert = helpers.insert
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local assert_alive = helpers.assert_alive
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before_each(clear)
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local function lua_eval(lua_expr)
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return exec_lua("return " .. lua_expr)
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end
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describe('treesitter node API', function()
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clear()
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it('double free tree', function()
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insert('F')
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exec_lua([[
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vim.treesitter.start(0, 'lua')
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vim.treesitter.get_node():tree()
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vim.treesitter.get_node():tree()
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collectgarbage()
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]])
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assert_alive()
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end)
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it('double free tree 2', function()
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exec_lua([[
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parser = vim.treesitter.get_parser(0, "c")
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local x = parser:parse()[1]:root():tree()
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vim.api.nvim_buf_set_text(0, 0,0, 0,0, {'y'})
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parser:parse()
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vim.api.nvim_buf_set_text(0, 0,0, 0,1, {'z'})
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parser:parse()
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collectgarbage()
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x:root()
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]])
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assert_alive()
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end)
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it('can move between siblings', function()
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insert([[
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int main(int x, int y, int z) {
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return x + y * z
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}
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]])
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exec_lua([[
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query = require"vim.treesitter.query"
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parser = vim.treesitter.get_parser(0, "c")
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tree = parser:parse()[1]
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root = tree:root()
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lang = vim.treesitter.language.inspect('c')
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function node_text(node)
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return query.get_node_text(node, 0)
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end
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]])
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exec_lua 'node = root:descendant_for_range(0, 11, 0, 16)'
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eq('int x', lua_eval('node_text(node)'))
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exec_lua 'node = node:next_sibling()'
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eq(',', lua_eval('node_text(node)'))
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exec_lua 'node = node:next_sibling()'
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eq('int y', lua_eval('node_text(node)'))
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exec_lua 'node = node:prev_sibling()'
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eq(',', lua_eval('node_text(node)'))
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exec_lua 'node = node:prev_sibling()'
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eq('int x', lua_eval('node_text(node)'))
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exec_lua 'node = node:next_named_sibling()'
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eq('int y', lua_eval('node_text(node)'))
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exec_lua 'node = node:prev_named_sibling()'
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eq('int x', lua_eval('node_text(node)'))
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end)
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it('can retrieve the children of a node', function()
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insert([[
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int main() {
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int x = 3;
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}]])
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local len = exec_lua([[
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tree = vim.treesitter.get_parser(0, "c"):parse()[1]
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node = tree:root():child(0)
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children = node:named_children()
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return #children
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]])
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eq(3, len)
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eq('<node compound_statement>', lua_eval('tostring(children[3])'))
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end)
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it('can retrieve the tree root given a node', function()
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insert([[
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int main() {
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int x = 3;
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}]])
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exec_lua([[
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tree = vim.treesitter.get_parser(0, "c"):parse()[1]
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root = tree:root()
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node = root:child(0):child(2)
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]])
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eq(lua_eval('tostring(root)'), lua_eval('tostring(node:root())'))
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end)
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it('can compute the byte length of a node', function()
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insert([[
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int main() {
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int x = 3;
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}]])
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exec_lua([[
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tree = vim.treesitter.get_parser(0, "c"):parse()[1]
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root = tree:root()
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child = root:child(0):child(0)
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]])
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eq(28, lua_eval('root:byte_length()'))
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eq(3, lua_eval('child:byte_length()'))
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end)
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end)
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