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local helpers = require('test.unit.helpers')(after_each)
local itp = helpers.gen_itp(it)
local luv = require('luv')
local child_call_once = helpers.child_call_once
local sleep = helpers.sleep
local ffi = helpers.ffi
local cimport = helpers.cimport
local to_cstr = helpers.to_cstr
local neq = helpers.neq
local eq = helpers.eq
local mkdir = helpers.mkdir
local options = cimport('./src/nvim/option_vars.h')
local undo = cimport('./src/nvim/undo.h')
local buffer = cimport('./src/nvim/buffer.h')
local old_p_udir = nil
-- Values expected by tests. Set in the setup function and destroyed in teardown
local file_buffer = nil
local buffer_hash = nil
child_call_once(function()
if old_p_udir == nil then
old_p_udir = options.p_udir -- save the old value of p_udir (undodir)
end
-- create a new buffer
local c_file = to_cstr('Xtest-unit-undo')
file_buffer = buffer.buflist_new(c_file, c_file, 1, buffer.BLN_LISTED)
file_buffer.b_u_numhead = 1 -- Pretend that the buffer has been changed
-- TODO(christopher.waldon.dev@gmail.com): replace the 32 with UNDO_HASH_SIZE
-- requires refactor of UNDO_HASH_SIZE into constant/enum for ffi
--
-- compute a hash for this undofile
buffer_hash = ffi.new('char[32]')
undo.u_compute_hash(file_buffer, buffer_hash)
end)
describe('u_write_undo', function()
setup(function()
mkdir('unit-test-directory')
luv.chdir('unit-test-directory')
options.p_udir = to_cstr(luv.cwd()) -- set p_udir to be the test dir
end)
teardown(function()
luv.chdir('..')
local success, err = luv.fs_rmdir('unit-test-directory')
if not success then
print(err) -- inform tester if directory fails to delete
end
options.p_udir = old_p_udir --restore old p_udir
end)
-- Lua wrapper for u_write_undo
local function u_write_undo(name, forceit, buf, buf_hash)
if name ~= nil then
name = to_cstr(name)
end
return undo.u_write_undo(name, forceit, buf, buf_hash)
end
itp('writes an undo file to undodir given a buffer and hash', function()
u_write_undo(nil, false, file_buffer, buffer_hash)
local correct_name = ffi.string(undo.u_get_undo_file_name(file_buffer.b_ffname, false))
local undo_file = io.open(correct_name, "r")
neq(undo_file, nil)
local success, err = os.remove(correct_name) -- delete the file now that we're done with it.
if not success then
print(err) -- inform tester if undofile fails to delete
end
end)
itp('writes a correctly-named undo file to undodir given a name, buffer, and hash', function()
local correct_name = "undofile.test"
u_write_undo(correct_name, false, file_buffer, buffer_hash)
local undo_file = io.open(correct_name, "r")
neq(undo_file, nil)
local success, err = os.remove(correct_name) -- delete the file now that we're done with it.
if not success then
print(err) -- inform tester if undofile fails to delete
end
end)
itp('does not write an undofile when the buffer has no valid undofile name', function()
-- TODO(christopher.waldon.dev@gmail.com): Figure out how to test this.
-- it's hard because u_get_undo_file_name() would need to return null
end)
itp('writes the undofile with the same permissions as the original file', function()
-- Create Test file and set permissions
local test_file_name = "./test.file"
local test_permission_file = io.open(test_file_name, "w")
test_permission_file:write("testing permissions")
test_permission_file:close()
local test_permissions = luv.fs_stat(test_file_name).mode
-- Create vim buffer
local c_file = to_cstr(test_file_name)
file_buffer = buffer.buflist_new(c_file, c_file, 1, buffer.BLN_LISTED)
file_buffer.b_u_numhead = 1 -- Pretend that the buffer has been changed
u_write_undo(nil, false, file_buffer, buffer_hash)
-- Find out the correct name of the undofile
local undo_file_name = ffi.string(undo.u_get_undo_file_name(file_buffer.b_ffname, false))
-- Find out the permissions of the new file
local permissions = luv.fs_stat(undo_file_name).mode
eq(test_permissions, permissions)
-- delete the file now that we're done with it.
local success, err = os.remove(test_file_name)
if not success then
print(err) -- inform tester if undofile fails to delete
end
success, err = os.remove(undo_file_name)
if not success then
print(err) -- inform tester if undofile fails to delete
end
end)
itp('writes an undofile only readable by the user if the buffer is unnamed', function()
local correct_permissions = 33152
local undo_file_name = "test.undo"
-- Create vim buffer
file_buffer = buffer.buflist_new(nil, nil, 1, buffer.BLN_LISTED)
file_buffer.b_u_numhead = 1 -- Pretend that the buffer has been changed
u_write_undo(undo_file_name, false, file_buffer, buffer_hash)
-- Find out the permissions of the new file
local permissions = luv.fs_stat(undo_file_name).mode
eq(correct_permissions, permissions)
-- delete the file now that we're done with it.
local success, err = os.remove(undo_file_name)
if not success then
print(err) -- inform tester if undofile fails to delete
end
end)
itp('forces writing undo file for :wundo! command', function()
local file_contents = "testing permissions"
-- Write a text file where the undofile should go
local correct_name = ffi.string(undo.u_get_undo_file_name(file_buffer.b_ffname, false))
helpers.write_file(correct_name, file_contents, true, false)
-- Call with `forceit`.
u_write_undo(correct_name, true, file_buffer, buffer_hash)
local undo_file_contents = helpers.read_file(correct_name)
neq(file_contents, undo_file_contents)
local success, deletion_err = os.remove(correct_name) -- delete the file now that we're done with it.
if not success then
print(deletion_err) -- inform tester if undofile fails to delete
end
end)
itp('overwrites an existing undo file', function()
u_write_undo(nil, false, file_buffer, buffer_hash)
local correct_name = ffi.string(undo.u_get_undo_file_name(file_buffer.b_ffname, false))
local file_last_modified = luv.fs_stat(correct_name).mtime.sec
sleep(1000) -- Ensure difference in timestamps.
file_buffer.b_u_numhead = 1 -- Mark it as if there are changes
u_write_undo(nil, false, file_buffer, buffer_hash)
local file_last_modified_2 = luv.fs_stat(correct_name).mtime.sec
-- print(file_last_modified, file_last_modified_2)
neq(file_last_modified, file_last_modified_2)
local success, err = os.remove(correct_name) -- delete the file now that we're done with it.
if not success then
print(err) -- inform tester if undofile fails to delete
end
end)
itp('does not overwrite an existing file that is not an undo file', function()
-- TODO: write test
end)
itp('does not overwrite an existing file that has the wrong permissions', function()
-- TODO: write test
end)
itp('does not write an undo file if there is no undo information for the buffer', function()
file_buffer.b_u_numhead = 0 -- Mark it as if there is no undo information
local correct_name = ffi.string(undo.u_get_undo_file_name(file_buffer.b_ffname, false))
local existing_file = io.open(correct_name,"r")
if existing_file then
existing_file:close()
os.remove(correct_name)
end
u_write_undo(nil, false, file_buffer, buffer_hash)
local undo_file = io.open(correct_name, "r")
eq(undo_file, nil)
end)
end)
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