test: silence expected errors

This will remove unrelated errors in .nvimlog at the end of test output.

src/nvim/decoration_provider.c

@@ -35,7 +35,7 @@ static kvec_t(DecorProvider) decor_providers = KV_INITIAL_VALUE;
 static void decor_provider_error(DecorProvider *provider, const char *name, const char *msg)
 {
   const char *ns_name = describe_ns(provider->ns_id, "(UNKNOWN PLUGIN)");
-  ELOG("error in provider %s.%s: %s", ns_name, name, msg);
+  ILOG("error in provider %s.%s: %s", ns_name, name, msg);
   msg_schedule_semsg_multiline("Error in decoration provider %s.%s:\n%s", ns_name, name, msg);
 }
 

src/nvim/event/libuv_process.c

@@ -90,7 +90,7 @@ int libuv_process_spawn(LibuvProcess *uvproc)
 
   int status;
   if ((status = uv_spawn(&proc->loop->uv, &uvproc->uv, &uvproc->uvopts))) {
-    ELOG("uv_spawn(%s) failed: %s", uvproc->uvopts.file, uv_strerror(status));
+    DLOG("uv_spawn(%s) failed: %s", uvproc->uvopts.file, uv_strerror(status));
     if (uvproc->uvopts.env) {
       os_free_fullenv(uvproc->uvopts.env);
     }

src/nvim/msgpack_rpc/channel.c

@@ -339,7 +339,7 @@ static void parse_msgpack(Channel *channel)
   }
 
   if (unpacker_closed(p)) {
-    chan_close_with_error(channel, p->unpack_error.msg, LOGLVL_ERR);
+    chan_close_with_error(channel, p->unpack_error.msg, LOGLVL_INF);
     api_clear_error(&p->unpack_error);
   }
 }

test/functional/autocmd/autocmd_oldtest_spec.lua

@@ -7,10 +7,18 @@ local api = helpers.api
 local fn = helpers.fn
 local exec = helpers.exec
 local feed = helpers.feed
+local assert_log = helpers.assert_log
+local is_os = helpers.is_os
+
+local testlog = 'Xtest_autocmd_oldtest_log'
 
 describe('oldtests', function()
   before_each(clear)
 
+  after_each(function()
+    os.remove(testlog)
+  end)
+
   local exec_lines = function(str)
     return fn.split(fn.execute(str), '\n')
   end
@@ -49,6 +57,7 @@ describe('oldtests', function()
   end)
 
   it('should fire on unload buf', function()
+    clear({ env = { NVIM_LOG_FILE = testlog } })
     fn.writefile({ 'Test file Xxx1' }, 'Xxx1')
     fn.writefile({ 'Test file Xxx2' }, 'Xxx2')
     local fname = 'Xtest_functional_autocmd_unload'
@@ -81,6 +90,10 @@ describe('oldtests', function()
     fn.delete('Xxx2')
     fn.delete(fname)
     fn.delete('Xout')
+
+    if is_os('win') then
+      assert_log('stream write failed. RPC canceled; closing channel', testlog)
+    end
   end)
 
   -- oldtest: Test_delete_ml_get_errors()

test/functional/core/startup_spec.lua

@@ -33,6 +33,8 @@ local tbl_map = vim.tbl_map
 local tbl_filter = vim.tbl_filter
 local endswith = vim.endswith
 
+local testlog = 'Xtest-startupspec-log'
+
 describe('startup', function()
   it('--clean', function()
     clear()
@@ -121,6 +123,10 @@ end)
 describe('startup', function()
   before_each(clear)
 
+  after_each(function()
+    os.remove(testlog)
+  end)
+
   describe('-l Lua', function()
     local function assert_l_out(expected, nvim_args, lua_args, script, input)
       local args = { nvim_prog }
@@ -371,6 +377,7 @@ describe('startup', function()
   end)
 
   it('output to pipe: has("ttyin")==1 has("ttyout")==0', function()
+    clear({ env = { NVIM_LOG_FILE = testlog } })
     if is_os('win') then
       command([[set shellcmdflag=/s\ /c shellxquote=\"]])
     end
@@ -398,9 +405,13 @@ describe('startup', function()
         read_file('Xtest_startup_ttyout')
       )
     end)
+    if is_os('win') then
+      assert_log('stream write failed. RPC canceled; closing channel', testlog)
+    end
   end)
 
   it('input from pipe: has("ttyin")==0 has("ttyout")==1', function()
+    clear({ env = { NVIM_LOG_FILE = testlog } })
     if is_os('win') then
       command([[set shellcmdflag=/s\ /c shellxquote=\"]])
     end
@@ -429,9 +440,13 @@ describe('startup', function()
         read_file('Xtest_startup_ttyout')
       )
     end)
+    if is_os('win') then
+      assert_log('stream write failed. RPC canceled; closing channel', testlog)
+    end
   end)
 
   it('input from pipe (implicit) #7679', function()
+    clear({ env = { NVIM_LOG_FILE = testlog } })
     local screen = Screen.new(25, 4)
     screen:attach()
     screen._default_attr_ids = nil
@@ -457,6 +472,9 @@ describe('startup', function()
       0 1                      |
                                |
     ]])
+    if not is_os('win') then
+      assert_log('Failed to get flags on descriptor 3: Bad file descriptor', testlog)
+    end
   end)
 
   it('input from pipe + file args #7679', function()

test/functional/options/defaults_spec.lua

@@ -865,6 +865,10 @@ describe('XDG defaults', function()
 end)
 
 describe('stdpath()', function()
+  after_each(function()
+    os.remove(testlog)
+  end)
+
   -- Windows appends 'nvim-data' instead of just 'nvim' to prevent collisions
   -- due to XDG_CONFIG_HOME, XDG_DATA_HOME and XDG_STATE_HOME being the same.
   local function maybe_data(name)
@@ -890,7 +894,7 @@ describe('stdpath()', function()
 
   it('reacts to $NVIM_APPNAME', function()
     local appname = 'NVIM_APPNAME_TEST' .. ('_'):rep(106)
-    clear({ env = { NVIM_APPNAME = appname } })
+    clear({ env = { NVIM_APPNAME = appname, NVIM_LOG_FILE = testlog } })
     eq(appname, fn.fnamemodify(fn.stdpath('config'), ':t'))
     eq(appname, fn.fnamemodify(fn.stdpath('cache'), ':t'))
     eq(maybe_data(appname), fn.fnamemodify(fn.stdpath('log'), ':t'))
@@ -928,6 +932,9 @@ describe('stdpath()', function()
     -- Valid appnames:
     test_appname('a/b', 0)
     test_appname('a/b\\c', 0)
+    if not is_os('win') then
+      assert_log('Failed to start server: no such file or directory:', testlog)
+    end
   end)
 
   describe('returns a String', function()

test/functional/terminal/tui_spec.lua

@@ -29,6 +29,9 @@ local spawn_argv = helpers.spawn_argv
 local set_session = helpers.set_session
 local write_file = helpers.write_file
 local eval = helpers.eval
+local assert_log = helpers.assert_log
+
+local testlog = 'Xtest-tui-log'
 
 if helpers.skip(is_os('win')) then
   return
@@ -3000,6 +3003,10 @@ end)
 -- These tests require `thelpers` because --headless/--embed
 -- does not initialize the TUI.
 describe('TUI as a client', function()
+  after_each(function()
+    os.remove(testlog)
+  end)
+
   it('connects to remote instance (with its own TUI)', function()
     local server_super = spawn_argv(false) -- equivalent to clear()
     local client_super = spawn_argv(true)
@@ -3077,7 +3084,7 @@ describe('TUI as a client', function()
 
   it('connects to remote instance (--headless)', function()
     local server = spawn_argv(false) -- equivalent to clear()
-    local client_super = spawn_argv(true)
+    local client_super = spawn_argv(true, { env = { NVIM_LOG_FILE = testlog } })
 
     set_session(server)
     local server_pipe = api.nvim_get_vvar('servername')
@@ -3120,6 +3127,9 @@ describe('TUI as a client', function()
 
     client_super:close()
     server:close()
+    if is_os('mac') then
+      assert_log('uv_tty_set_mode failed: Unknown system error %-102', testlog)
+    end
   end)
 
   it('throws error when no server exists', function()

test/functional/ui/embed_spec.lua

@@ -13,6 +13,10 @@ local fn = helpers.fn
 local nvim_prog = helpers.nvim_prog
 local retry = helpers.retry
 local write_file = helpers.write_file
+local assert_log = helpers.assert_log
+local is_os = helpers.is_os
+
+local testlog = 'Xtest-embed-log'
 
 local function test_embed(ext_linegrid)
   local screen
@@ -93,13 +97,17 @@ describe('--embed UI on startup (ext_linegrid=false)', function()
 end)
 
 describe('--embed UI', function()
+  after_each(function()
+    os.remove(testlog)
+  end)
+
   it('can pass stdin', function()
     local pipe = assert(uv.pipe())
 
     local writer = assert(uv.new_pipe(false))
     writer:open(pipe.write)
 
-    clear { args_rm = { '--headless' }, io_extra = pipe.read }
+    clear { args_rm = { '--headless' }, io_extra = pipe.read, env = { NVIM_LOG_FILE = testlog } }
 
     -- attach immediately after startup, for early UI
     local screen = Screen.new(40, 8)
@@ -131,6 +139,10 @@ describe('--embed UI', function()
       {1:~                                       }|*4
       {2:-- INSERT --}                            |
     ]]
+
+    if not is_os('win') then
+      assert_log('Failed to get flags on descriptor 3: Bad file descriptor', testlog)
+    end
   end)
 
   it('can pass stdin to -q - #17523', function()