TST: Test unusual class constructors (#135)

Refs:
* #124
* 332d09a

pdoc/test/__init__.py

@@ -209,7 +209,7 @@ def test_html_multiple_files(self):
     def test_html_identifier(self):
         for package in ('', '._private'):
             with self.subTest(package=package), \
-                 self.assertWarns(UserWarning) as cm:
+                    self.assertWarns(UserWarning) as cm:
                 with run_html(EXAMPLE_MODULE + package, filter='A',
                               config='show_source_code=False'):
                     self._check_files(['A'], ['CONST', 'B docstring'])
@@ -379,6 +379,7 @@ class ApiTest(unittest.TestCase):
     """
     Programmatic/API unit tests.
     """
+
     def setUp(self):
         pdoc.reset()
 
@@ -398,7 +399,7 @@ def test_module(self):
 
     def test_import_filename(self):
         with patch.object(sys, 'path', ['']), \
-             chdir(os.path.join(TESTS_BASEDIR, EXAMPLE_MODULE)):
+                chdir(os.path.join(TESTS_BASEDIR, EXAMPLE_MODULE)):
             pdoc.import_module('index')
 
     def test_imported_once(self):
@@ -702,6 +703,7 @@ def __init__(self):
 
         class C:
             """foo"""
+
             def __init__(self):
                 """bar"""
 
@@ -730,6 +732,12 @@ def __init__(self, x):
         with patch.dict(mod.obj.__pdoc__, {'C.__init__': False}):
             self.assertEqual(pdoc.Class('C', mod, C).params(), [])
 
+        # test case for https://github.com/pdoc3/pdoc/issues/124
+        class C2:
+            __signature__ = inspect.signature(lambda a, b, c=None, *, d=1, e: None)
+
+        self.assertEqual(pdoc.Class('C2', mod, C2).params(), ['a', 'b', 'c=None', '*', 'd=1', 'e'])
+
     def test_url(self):
         mod = pdoc.Module(EXAMPLE_MODULE)
         pdoc.link_inheritance()
@@ -782,6 +790,7 @@ class HtmlHelpersTest(unittest.TestCase):
     """
     Unit tests for helper functions for producing HTML.
     """
+
     def test_minify_css(self):
         css = 'a { color: white; } /*comment*/ b {;}'
         minified = minify_css(css)