1 files changed, 37 insertions, 0 deletions
diff --git a/test/functional/api/ui_spec.lua b/test/functional/api/ui_spec.lua
new file mode 100644
index 0000000000..b028a50b02
--- /dev/null
+++ b/test/functional/api/ui_spec.lua
@@ -0,0 +1,37 @@
+local helpers = require('test.functional.helpers')(after_each)
+local Screen = require('test.functional.ui.screen')
+local clear = helpers.clear
+local eq = helpers.eq
+local eval = helpers.eval
+local expect_err = helpers.expect_err
+local meths = helpers.meths
+local request = helpers.request
+
+describe('nvim_ui_attach()', function()
+  before_each(function()
+    clear()
+  end)
+  it('handles very large width/height #2180', function()
+    local screen = Screen.new(999, 999)
+    screen:attach()
+    eq(999, eval('&lines'))
+    eq(999, eval('&columns'))
+  end)
+  it('invalid option returns error', function()
+    expect_err('No such UI option: foo',
+               meths.ui_attach, 80, 24, { foo={'foo'} })
+  end)
+  it('validates channel arg', function()
+    expect_err('UI not attached to channel: 1',
+               request, 'nvim_ui_try_resize', 40, 10)
+    expect_err('UI not attached to channel: 1',
+               request, 'nvim_ui_set_option', 'rgb', true)
+    expect_err('UI not attached to channel: 1',
+               request, 'nvim_ui_detach')
+
+    local screen = Screen.new()
+    screen:attach({rgb=false})
+    expect_err('UI already attached to channel: 1',
+               request, 'nvim_ui_attach', 40, 10, { rgb=false })
+  end)
+end)