Added test for issue click-contrib#17

test.py

@@ -25,6 +25,20 @@ def bar():
     click.echo('bar')
 
 
+@click.group(cls=DefaultGroup, default='baz', default_if_no_args=True, invoke_without_command=True)
+@click.option('--verbose', is_flag=True)
+def cli2(group_only):
+    if group_only:
+        click.echo('--verbose passed.')
+
+
+@cli2.command()
+@click.option('--baz', default='baz')
+def baz(baz):
+    click.echo('baz called.')
+    click.echo(baz)
+
+
 r = CliRunner()
 
 
@@ -37,6 +51,10 @@ def test_group_arguments():
     assert r.invoke(cli, ['--group-only']).output == '--group-only passed.\n'
 
 
+def test_group_arguments_call_default():
+    assert r.invoke(cli2, ['--verbose']).output == '--verbose passed.\nbaz called.\n'
+
+
 def test_explicit_command():
     assert r.invoke(cli, ['foo']).output == 'foo\n'
     assert r.invoke(cli, ['bar']).output == 'bar\n'