1 files changed, 56 insertions, 0 deletions
diff --git a/src/testdir/test_vim9_assign.vim b/src/testdir/test_vim9_assign.vim
index 3a187774ec..bff9c9f8f1 100644
--- a/src/testdir/test_vim9_assign.vim
+++ b/src/testdir/test_vim9_assign.vim
@@ -1863,6 +1863,62 @@ def Test_assign_lambda()
   v9.CheckDefAndScriptFailure(lines, 'E1051:')
 enddef
 
+def Test_assign_funcref_args()
+  # unspecified arguments match everything, including varargs
+  var lines =<< trim END
+    vim9script
+
+    var FuncUnknown: func: number
+
+    FuncUnknown = (v): number => v
+    assert_equal(5, FuncUnknown(5))
+
+    FuncUnknown = (v1, v2): number => v1 + v2
+    assert_equal(7, FuncUnknown(3, 4))
+
+    FuncUnknown = (...v1): number => v1[0] + v1[1] + len(v1) * 1000
+    assert_equal(4007, FuncUnknown(3, 4, 5, 6))
+
+    FuncUnknown = (v: list<any>): number => v[0] + v[1] + len(v) * 1000
+    assert_equal(5009, FuncUnknown([4, 5, 6, 7, 8]))
+  END
+  v9.CheckScriptSuccess(lines)
+
+  # varargs must match
+  lines =<< trim END
+    vim9script
+    var FuncAnyVA: func(...any): number
+    FuncAnyVA = (v): number => v
+  END
+  v9.CheckScriptFailure(lines, 'E1012: Type mismatch; expected func(...any): number but got func(any): number')
+
+  # varargs must match
+  lines =<< trim END
+    vim9script
+    var FuncAnyVA: func(...any): number
+    FuncAnyVA = (v1, v2): number => v1 + v2
+  END
+  v9.CheckScriptFailure(lines, 'E1012: Type mismatch; expected func(...any): number but got func(any, any): number')
+
+  # varargs must match
+  lines =<< trim END
+    vim9script
+    var FuncAnyVA: func(...any): number
+    FuncAnyVA = (v1: list<any>): number => 3
+  END
+  v9.CheckScriptFailure(lines, 'E1012: Type mismatch; expected func(...any): number but got func(list<any>): number')
+enddef
+
+def Test_assign_funcref_arg_any()
+  var lines =<< trim END
+    vim9script
+    var FuncAnyVA: func(any): number
+    FuncAnyVA = (v): number => v
+  END
+  # TODO: Verify this should succeed.
+  v9.CheckScriptSuccess(lines)
+enddef
+
 def Test_heredoc()
   # simple heredoc
   var lines =<< trim END