test: move most title tests to a separate file (#23557)

This avoids running title tests twice unnecessarily.

1 files changed, 138 insertions, 0 deletions

diff --git a/test/functional/ui/title_spec.lua b/test/functional/ui/title_spec.lua
new file mode 100644
index 0000000000..75ead49f74
--- /dev/null
+++ b/test/functional/ui/title_spec.lua
@@ -0,0 +1,138 @@
+local helpers = require('test.functional.helpers')(after_each)
+local Screen = require('test.functional.ui.screen')
+local clear = helpers.clear
+local command = helpers.command
+local curwin = helpers.curwin
+local eq = helpers.eq
+local exec_lua = helpers.exec_lua
+local feed = helpers.feed
+local funcs = helpers.funcs
+local meths = helpers.meths
+local is_os = helpers.is_os
+
+describe('title', function()
+  local screen
+
+  before_each(function()
+    clear()
+    screen = Screen.new()
+    screen:attach()
+  end)
+
+  it('has correct default title with unnamed file', function()
+    local expected = '[No Name] - NVIM'
+    command('set title')
+    screen:expect(function()
+      eq(expected, screen.title)
+    end)
+  end)
+
+  it('has correct default title with named file', function()
+    local expected = (is_os('win') and 'myfile (C:\\mydir) - NVIM' or 'myfile (/mydir) - NVIM')
+    command('set title')
+    command(is_os('win') and 'file C:\\mydir\\myfile' or 'file /mydir/myfile')
+    screen:expect(function()
+      eq(expected, screen.title)
+    end)
+  end)
+
+  describe('is not changed by', function()
+    local file1 = is_os('win') and 'C:\\mydir\\myfile1' or '/mydir/myfile1'
+    local file2 = is_os('win') and 'C:\\mydir\\myfile2' or '/mydir/myfile2'
+    local expected = (is_os('win') and 'myfile1 (C:\\mydir) - NVIM' or 'myfile1 (/mydir) - NVIM')
+    local buf2
+
+    before_each(function()
+      command('edit '..file1)
+      buf2 = funcs.bufadd(file2)
+      command('set title')
+    end)
+
+    it('calling setbufvar() to set an option in a hidden buffer from i_CTRL-R', function()
+      command([[inoremap <F2> <C-R>=setbufvar(]]..buf2..[[, '&autoindent', 1) ? '' : ''<CR>]])
+      feed('i<F2><Esc>')
+      command('redraw!')
+      screen:expect(function()
+        eq(expected, screen.title)
+      end)
+    end)
+
+    it('an RPC call to nvim_buf_set_option in a hidden buffer', function()
+      meths.buf_set_option(buf2, 'autoindent', true)
+      command('redraw!')
+      screen:expect(function()
+        eq(expected, screen.title)
+      end)
+    end)
+
+    it('a Lua callback calling nvim_buf_set_option in a hidden buffer', function()
+      exec_lua(string.format([[
+        vim.schedule(function()
+          vim.api.nvim_buf_set_option(%d, 'autoindent', true)
+        end)
+      ]], buf2))
+      command('redraw!')
+      screen:expect(function()
+        eq(expected, screen.title)
+      end)
+    end)
+
+    it('a Lua callback calling nvim_buf_call in a hidden buffer', function()
+      exec_lua(string.format([[
+        vim.schedule(function()
+          vim.api.nvim_buf_call(%d, function() end)
+        end)
+      ]], buf2))
+      command('redraw!')
+      screen:expect(function()
+        eq(expected, screen.title)
+      end)
+    end)
+
+    it('setting the buffer of another window using RPC', function()
+      local oldwin = curwin().id
+      command('split')
+      meths.win_set_buf(oldwin, buf2)
+      command('redraw!')
+      screen:expect(function()
+        eq(expected, screen.title)
+      end)
+    end)
+
+    it('setting the buffer of another window using Lua callback', function()
+      local oldwin = curwin().id
+      command('split')
+      exec_lua(string.format([[
+        vim.schedule(function()
+          vim.api.nvim_win_set_buf(%d, %d)
+        end)
+      ]], oldwin, buf2))
+      command('redraw!')
+      screen:expect(function()
+        eq(expected, screen.title)
+      end)
+    end)
+
+    it('creating a floating window using RPC', function()
+      meths.open_win(buf2, false, {
+        relative = 'editor', width = 5, height = 5, row = 0, col = 0,
+      })
+      command('redraw!')
+      screen:expect(function()
+        eq(expected, screen.title)
+      end)
+    end)
+
+    it('creating a floating window using Lua callback', function()
+      exec_lua(string.format([[
+        vim.api.nvim_open_win(%d, false, {
+          relative = 'editor', width = 5, height = 5, row = 0, col = 0,
+        })
+      ]], buf2))
+      command('redraw!')
+      screen:expect(function()
+        eq(expected, screen.title)
+      end)
+    end)
+  end)
+end)