A test suite imported from jedi.

test/test_param_splitting.py

@@ -0,0 +1,34 @@
+'''
+To make the life of any analysis easier, we are generating Param objects
+instead of simple parser objects.
+'''
+
+from textwrap import dedent
+
+from parso.python import parse
+
+
+def assert_params(param_string, **wanted_dct):
+    source = dedent('''
+    def x(%s):
+        pass
+    ''') % param_string
+
+    module = parse(source)
+    funcdef = next(module.iter_funcdefs())
+    dct = dict((p.name.value, p.default and p.default.get_code())
+               for p in funcdef.params)
+    assert dct == wanted_dct
+    assert module.get_code() == source
+
+
+def test_split_params_with_separation_star():
+    assert_params(u'x, y=1, *, z=3', x=None, y='1', z='3')
+    assert_params(u'*, x', x=None)
+    assert_params(u'*')
+
+
+def test_split_params_with_stars():
+    assert_params(u'x, *args', x=None, args=None)
+    assert_params(u'**kwargs', kwargs=None)
+    assert_params(u'*args, **kwargs', args=None, kwargs=None)