Only allow one param decl for Arguments

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/test_arguments.py b/tests/test_arguments.py
index a6a3258..1cdb43d 100644
--- a/tests/test_arguments.py
+++ b/tests/test_arguments.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+import pytest
 import click
 from click._compat import PY2
 
@@ -287,3 +288,11 @@ def test_defaults_for_nargs(runner):
     result = runner.invoke(cmd, ['3'])
     assert result.exception is not None
     assert 'argument a takes 2 values' in result.output
+
+
+@pytest.mark.xfail
+def test_multiple_param_decls_not_allowed(runner):
+    @click.command()
+    @click.argument('x', click.Choice(['a', 'b']))
+    def copy(x):
+        click.echo(x)