bpo-32989: IDLE - fix bad editor call of pyparse method (GH-5968)

Fix comments and add tests for editor newline_and_indent_event method.
Remove unused None default for function parameter of pyparse find_good_parse_start method
and code triggered by that default.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
(cherry picked from commit ec64640a2c5236d7a5d5470d759172a3d93eab0b)

Co-authored-by: Cheryl Sabella <cheryl.sabella@gmail.com>

1 files changed, 15 insertions, 12 deletions

diff --git a/Lib/idlelib/idle_test/test_pyparse.py b/Lib/idlelib/idle_test/test_pyparse.py
index f7154e6..a2b13c3 100644
--- a/Lib/idlelib/idle_test/test_pyparse.py
+++ b/Lib/idlelib/idle_test/test_pyparse.py
@@ -18,7 +18,7 @@ class ParseMapTest(unittest.TestCase):
         # trans is the production instance of ParseMap, used in _study1
         parser = pyparse.Parser(4, 4)
         self.assertEqual('\t a([{b}])b"c\'d\n'.translate(pyparse.trans),
-                          'xxx(((x)))x"x\'x\n')
+                         'xxx(((x)))x"x\'x\n')
 
 
 class PyParseTest(unittest.TestCase):
@@ -61,14 +61,17 @@ class PyParseTest(unittest.TestCase):
 
         # Split def across lines.
         setcode('"""This is a module docstring"""\n'
-               'class C():\n'
-               '    def __init__(self, a,\n'
-               '                 b=True):\n'
-               '        pass\n'
-               )
+                'class C():\n'
+                '    def __init__(self, a,\n'
+                '                 b=True):\n'
+                '        pass\n'
+                )
 
-        # No value sent for is_char_in_string().
-        self.assertIsNone(start())
+        # Passing no value or non-callable should fail (issue 32989).
+        with self.assertRaises(TypeError):
+            start()
+        with self.assertRaises(TypeError):
+            start(False)
 
         # Make text look like a string.  This returns pos as the start
         # position, but it's set to None.
@@ -91,10 +94,10 @@ class PyParseTest(unittest.TestCase):
         # Code without extra line break in def line - mostly returns the same
         # values.
         setcode('"""This is a module docstring"""\n'
-               'class C():\n'
-               '    def __init__(self, a, b=True):\n'
-               '        pass\n'
-               )
+                'class C():\n'
+                '    def __init__(self, a, b=True):\n'
+                '        pass\n'
+                )
         eq(start(is_char_in_string=lambda index: False), 44)
         eq(start(is_char_in_string=lambda index: index > 44), 44)
         eq(start(is_char_in_string=lambda index: index >= 44), 33)