fix(event-loop): call vpeekc() directly first to check for character

Expand mappings first by calling `vpeekc()` directly.

2 files changed, 27 insertions, 0 deletions

diff --git a/test/functional/ui/input_spec.lua b/test/functional/ui/input_spec.lua
index 11718a6e18..cf22757b91 100644
--- a/test/functional/ui/input_spec.lua
+++ b/test/functional/ui/input_spec.lua
@@ -140,6 +140,25 @@ describe('input utf sequences that contain CSI (0x9B)', function()
   end)
 end)
 
+describe('input split utf sequences', function()
+  it('ok', function()
+    local str = '►'
+    feed('i' .. str:sub(1, 1))
+    helpers.sleep(10)
+    feed(str:sub(2, 3))
+    expect('►')
+  end)
+
+  it('can be mapped', function()
+    command('inoremap ► E296BA')
+    local str = '►'
+    feed('i' .. str:sub(1, 1))
+    helpers.sleep(10)
+    feed(str:sub(2, 3))
+    expect('E296BA')
+  end)
+end)
+
 describe('input non-printable chars', function()
   after_each(function()
     os.remove('Xtest-overwrite')
diff --git a/test/functional/vimscript/timer_spec.lua b/test/functional/vimscript/timer_spec.lua
index e45b64422f..25e46062b7 100644
--- a/test/functional/vimscript/timer_spec.lua
+++ b/test/functional/vimscript/timer_spec.lua
@@ -272,4 +272,12 @@ describe('timers', function()
     ]]
     eq("Vim(call):E48: Not allowed in sandbox", exc_exec("sandbox call timer_start(0, 'Scary')"))
   end)
+
+  it('can be triggered after an empty string <expr> mapping', function()
+    local screen = Screen.new(40, 6)
+    screen:attach()
+    command([=[imap <expr> <F2> [timer_start(0, { _ -> execute("throw 'x'", "") }), ''][-1]]=])
+    feed('i<F2>')
+    screen:expect({any='E605: Exception not caught: x'})
+  end)
 end)