mksession: Restore tab-local working directory #6859

The ':tcd' command is the first tab-specific command written to the file
and it is wrapped inside an 'if has('nvim')' block to keep the session
file compatible with Vim.

Closes #6678

1 files changed, 49 insertions, 0 deletions

diff --git a/test/functional/ex_cmds/mksession_spec.lua b/test/functional/ex_cmds/mksession_spec.lua
new file mode 100644
index 0000000000..5d658f10bb
--- /dev/null
+++ b/test/functional/ex_cmds/mksession_spec.lua
@@ -0,0 +1,49 @@
+local lfs = require('lfs')
+local helpers = require('test.functional.helpers')(after_each)
+
+local clear = helpers.clear
+local command = helpers.command
+local get_pathsep = helpers.get_pathsep
+local eq = helpers.eq
+local funcs = helpers.funcs
+
+local file_prefix = 'Xtest-functional-ex_cmds-mksession_spec'
+
+describe(':mksession', function()
+  local session_file = file_prefix .. '.vim'
+  local tab_dir = file_prefix .. '.d'
+
+  before_each(function()
+    clear()
+    lfs.mkdir(tab_dir)
+  end)
+
+  after_each(function()
+    os.remove(session_file)
+    lfs.rmdir(tab_dir)
+  end)
+
+  it('restores tab-local working directories', function()
+    local tmpfile_base = file_prefix .. '-tmpfile'
+    local cwd_dir = funcs.getcwd()
+
+    -- :mksession does not save empty tabs, so create some buffers.
+    command('edit ' .. tmpfile_base .. '1')
+    command('tabnew')
+    command('edit ' .. tmpfile_base .. '2')
+    command('tcd ' .. tab_dir)
+    command('tabfirst')
+    command('mksession ' .. session_file)
+
+    -- Create a new test instance of Nvim.
+    clear()
+
+    command('source ' .. session_file)
+    -- First tab should have the original working directory.
+    command('tabnext 1')
+    eq(cwd_dir, funcs.getcwd())
+    -- Second tab should have the tab-local working directory.
+    command('tabnext 2')
+    eq(cwd_dir .. get_pathsep() .. tab_dir, funcs.getcwd())
+  end)
+end)