Replace some instances of vim.cmd('set ...')

lua/lean/infoview.lua

@@ -261,16 +261,14 @@ function Infoview:__refresh()
   local valid_windows = {}
 
   self.info.__win_event_disable = true
-  for _, win in pairs({self.window, self.__diff_win}) do
+  for _, win in pairs{ self.window, self.__diff_win } do
     if win and vim.api.nvim_win_is_valid(win) then
       table.insert(valid_windows, win)
     end
   end
 
   for _, win in pairs(valid_windows) do
-    vim.api.nvim_win_call(win, function()
-      vim.cmd('set winfixwidth')
-    end)
+    vim.wo[win].winfixwidth = true
   end
 
   for _, win in pairs(valid_windows) do
@@ -311,8 +309,8 @@ function Infoview:__refresh_diff()
   for _, win in pairs({self.__diff_win, self.window}) do
     vim.api.nvim_win_call(win, function()
       vim.cmd.diffthis()
-      vim.cmd("set foldmethod=manual")
-      vim.cmd("setlocal wrap")
+      vim.wo.foldmethod = 'manual'
+      vim.wo.wrap = true
     end)
   end
 

lua/tests/infoview/open_close_spec.lua

@@ -47,7 +47,7 @@ describe('infoview open/close', function()
 
   it('remains open on splitting the current window', function(_)
     local windows = vim.api.nvim_tabpage_list_wins(0)
-    assert.is.equal(2, #windows)  -- +1 above
+    assert.is.equal(2, #windows)
     assert.is.truthy(
       vim.tbl_contains(windows, infoview.get_current_infoview().window)
     )
@@ -64,6 +64,13 @@ describe('infoview open/close', function()
     assert.windows.are(windows)
   end)
 
+  it('is fixed width', function(_)
+    local windows = vim.api.nvim_tabpage_list_wins(0)
+    assert.is.equal(#windows, 2)
+    assert.is.truthy(vim.wo[infoview.get_current_infoview().window].winfixwidth)
+    assert.is.falsy(vim.wo[lean_window].winfixwidth)
+  end)
+
   it('closes via its Lua API and stays closed', function(_)
     infoview.get_current_infoview():close()
     assert.windows.are(lean_window)