1 files changed, 29 insertions, 0 deletions
diff --git a/test/functional/vimscript/uniq_spec.lua b/test/functional/vimscript/uniq_spec.lua
new file mode 100644
index 0000000000..43ad4a7640
--- /dev/null
+++ b/test/functional/vimscript/uniq_spec.lua
@@ -0,0 +1,29 @@
+local helpers = require('test.functional.helpers')(after_each)
+
+local eq = helpers.eq
+local clear = helpers.clear
+local command = helpers.command
+local exc_exec = helpers.exc_exec
+local pcall_err = helpers.pcall_err
+
+before_each(clear)
+
+describe('uniq()', function()
+  it('errors out when processing special values', function()
+    eq('Vim(call):E362: Using a boolean value as a Float',
+       exc_exec('call uniq([v:true, v:false], "f")'))
+  end)
+
+  it('can yield E882 and stop filtering after that', function()
+    command([[
+      function Cmp(a, b)
+        if type(a:a) == type([]) || type(a:b) == type([])
+          return []
+        endif
+        return (a:a > a:b) - (a:a < a:b)
+      endfunction
+    ]])
+    eq('Vim(let):E745: Using a List as a Number',
+       pcall_err(command, 'let fl = uniq([0, 0, [], 1, 1], "Cmp")'))
+  end)
+end)