1 files changed, 49 insertions, 0 deletions
diff --git a/test/functional/terminal/channel_spec.lua b/test/functional/terminal/channel_spec.lua
new file mode 100644
index 0000000000..7d37dcccc8
--- /dev/null
+++ b/test/functional/terminal/channel_spec.lua
@@ -0,0 +1,49 @@
+local helpers = require('test.functional.helpers')(after_each)
+local clear = helpers.clear
+local eq = helpers.eq
+local command = helpers.command
+local exc_exec = helpers.exc_exec
+local feed = helpers.feed
+local sleep = helpers.sleep
+local poke_eventloop = helpers.poke_eventloop
+
+describe('associated channel is closed and later freed for terminal', function()
+  before_each(clear)
+
+  it('opened by nvim_open_term() and deleted by :bdelete!', function()
+    command([[let id = nvim_open_term(0, {})]])
+    -- channel hasn't been freed yet
+    eq("Vim(call):Can't send data to closed stream", exc_exec([[bdelete! | call chansend(id, 'test')]]))
+    -- process free_channel_event
+    poke_eventloop()
+    -- channel has been freed
+    eq("Vim(call):E900: Invalid channel id", exc_exec([[call chansend(id, 'test')]]))
+  end)
+
+  it('opened by termopen(), exited, and deleted by pressing a key', function()
+    command([[let id = termopen('echo')]])
+    sleep(500)
+    -- process has exited
+    eq("Vim(call):Can't send data to closed stream", exc_exec([[call chansend(id, 'test')]]))
+    -- delete terminal
+    feed('i<CR>')
+    -- process term_delayed_free and free_channel_event
+    poke_eventloop()
+    -- channel has been freed
+    eq("Vim(call):E900: Invalid channel id", exc_exec([[call chansend(id, 'test')]]))
+  end)
+
+  -- This indirectly covers #16264
+  it('opened by termopen(), exited, and deleted by :bdelete', function()
+    command([[let id = termopen('echo')]])
+    sleep(500)
+    -- process has exited
+    eq("Vim(call):Can't send data to closed stream", exc_exec([[call chansend(id, 'test')]]))
+    -- channel hasn't been freed yet
+    eq("Vim(call):Can't send data to closed stream", exc_exec([[bdelete | call chansend(id, 'test')]]))
+    -- process term_delayed_free and free_channel_event
+    poke_eventloop()
+    -- channel has been freed
+    eq("Vim(call):E900: Invalid channel id", exc_exec([[call chansend(id, 'test')]]))
+  end)
+end)