bpo-33855: More edits and new minimal tests for IDLE (GH-7761)

Part 2 of 3.  Continues PR GH-7689, changeset ee5ef30.
Edit and add tests for 18 modules, help_about to replace and run.
(cherry picked from commit ea3dc80)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Author: miss-islington

Lib/idlelib/help_about.py

@@ -199,7 +199,8 @@ def ok(self, event=None):
 
 
 if __name__ == '__main__':
-    import unittest
-    unittest.main('idlelib.idle_test.test_help_about', verbosity=2, exit=False)
+    from unittest import main
+    main('idlelib.idle_test.test_help_about', verbosity=2, exit=False)
+
     from idlelib.idle_test.htest import run
     run(AboutDialog)

Lib/idlelib/hyperparser.py

@@ -308,5 +308,5 @@ def get_expression(self):
 
 
 if __name__ == '__main__':
-    import unittest
-    unittest.main('idlelib.idle_test.test_hyperparser', verbosity=2)
+    from unittest import main
+    main('idlelib.idle_test.test_hyperparser', verbosity=2)

Lib/idlelib/idle_test/test_help_about.py

@@ -1,18 +1,19 @@
-'''Test idlelib.help_about.
+"""Test help_about, coverage 100%.
+help_about.build_bits branches on sys.platform='darwin'.
+'100% combines coverage on Mac and others.
+"""
 
-Coverage: 100%
-'''
+from idlelib import help_about
+import unittest
 from test.support import requires, findfile
 from tkinter import Tk, TclError
-import unittest
-from unittest import mock
 from idlelib.idle_test.mock_idle import Func
 from idlelib.idle_test.mock_tk import Mbox_func
-from idlelib.help_about import AboutDialog as About
-from idlelib import help_about
 from idlelib import textview
 import os.path
-from platform import python_version, architecture
+from platform import python_version
+
+About = help_about.AboutDialog
 
 
 class LiveDialogTest(unittest.TestCase):

Lib/idlelib/idle_test/test_history.py

@@ -1,15 +1,18 @@
+" Test history, coverage 100%."
+
+from idlelib.history import History
 import unittest
 from test.support import requires
 
 import tkinter as tk
 from tkinter import Text as tkText
 from idlelib.idle_test.mock_tk import Text as mkText
-from idlelib.history import History
 from idlelib.config import idleConf
 
 line1 = 'a = 7'
 line2 = 'b = a'
 
+
 class StoreTest(unittest.TestCase):
     '''Tests History.__init__ and History.store with mock Text'''
 
@@ -61,6 +64,7 @@ def __getattr__(self, name):
     def bell(self):
         self._bell = True
 
+
 class FetchTest(unittest.TestCase):
     '''Test History.fetch with wrapped tk.Text.
     '''

Lib/idlelib/idle_test/test_hyperparser.py

@@ -1,9 +1,10 @@
-"""Unittest for idlelib.hyperparser.py."""
+"Test hyperparser, coverage 98%."
+
+from idlelib.hyperparser import HyperParser
 import unittest
 from test.support import requires
 from tkinter import Tk, Text
 from idlelib.editor import EditorWindow
-from idlelib.hyperparser import HyperParser
 
 class DummyEditwin:
     def __init__(self, text):
@@ -270,5 +271,6 @@ def test_eat_identifier_various_lengths(self):
             self.assertEqual(eat_id('2' + 'a' * (length - 1), 0, length), 0)
             self.assertEqual(eat_id('2' + 'é' * (length - 1), 0, length), 0)
 
+
 if __name__ == '__main__':
     unittest.main(verbosity=2)

Lib/idlelib/idle_test/test_iomenu.py

@@ -1,233 +1,36 @@
-import unittest
-import io
-
-from idlelib.run import PseudoInputFile, PseudoOutputFile
-
-
-class S(str):
-    def __str__(self):
-        return '%s:str' % type(self).__name__
-    def __unicode__(self):
-        return '%s:unicode' % type(self).__name__
-    def __len__(self):
-        return 3
-    def __iter__(self):
-        return iter('abc')
-    def __getitem__(self, *args):
-        return '%s:item' % type(self).__name__
-    def __getslice__(self, *args):
-        return '%s:slice' % type(self).__name__
-
-class MockShell:
-    def __init__(self):
-        self.reset()
-
-    def write(self, *args):
-        self.written.append(args)
-
-    def readline(self):
-        return self.lines.pop()
-
-    def close(self):
-        pass
-
-    def reset(self):
-        self.written = []
-
-    def push(self, lines):
-        self.lines = list(lines)[::-1]
-
-
-class PseudeOutputFilesTest(unittest.TestCase):
-    def test_misc(self):
-        shell = MockShell()
-        f = PseudoOutputFile(shell, 'stdout', 'utf-8')
-        self.assertIsInstance(f, io.TextIOBase)
-        self.assertEqual(f.encoding, 'utf-8')
-        self.assertIsNone(f.errors)
-        self.assertIsNone(f.newlines)
-        self.assertEqual(f.name, '<stdout>')
-        self.assertFalse(f.closed)
-        self.assertTrue(f.isatty())
-        self.assertFalse(f.readable())
-        self.assertTrue(f.writable())
-        self.assertFalse(f.seekable())
-
-    def test_unsupported(self):
-        shell = MockShell()
-        f = PseudoOutputFile(shell, 'stdout', 'utf-8')
-        self.assertRaises(OSError, f.fileno)
-        self.assertRaises(OSError, f.tell)
-        self.assertRaises(OSError, f.seek, 0)
-        self.assertRaises(OSError, f.read, 0)
-        self.assertRaises(OSError, f.readline, 0)
-
-    def test_write(self):
-        shell = MockShell()
-        f = PseudoOutputFile(shell, 'stdout', 'utf-8')
-        f.write('test')
-        self.assertEqual(shell.written, [('test', 'stdout')])
-        shell.reset()
-        f.write('t\xe8st')
-        self.assertEqual(shell.written, [('t\xe8st', 'stdout')])
-        shell.reset()
-
-        f.write(S('t\xe8st'))
-        self.assertEqual(shell.written, [('t\xe8st', 'stdout')])
-        self.assertEqual(type(shell.written[0][0]), str)
-        shell.reset()
+"Test , coverage 16%."
 
-        self.assertRaises(TypeError, f.write)
-        self.assertEqual(shell.written, [])
-        self.assertRaises(TypeError, f.write, b'test')
-        self.assertRaises(TypeError, f.write, 123)
-        self.assertEqual(shell.written, [])
-        self.assertRaises(TypeError, f.write, 'test', 'spam')
-        self.assertEqual(shell.written, [])
-
-    def test_writelines(self):
-        shell = MockShell()
-        f = PseudoOutputFile(shell, 'stdout', 'utf-8')
-        f.writelines([])
-        self.assertEqual(shell.written, [])
-        shell.reset()
-        f.writelines(['one\n', 'two'])
-        self.assertEqual(shell.written,
-                         [('one\n', 'stdout'), ('two', 'stdout')])
-        shell.reset()
-        f.writelines(['on\xe8\n', 'tw\xf2'])
-        self.assertEqual(shell.written,
-                         [('on\xe8\n', 'stdout'), ('tw\xf2', 'stdout')])
-        shell.reset()
-
-        f.writelines([S('t\xe8st')])
-        self.assertEqual(shell.written, [('t\xe8st', 'stdout')])
-        self.assertEqual(type(shell.written[0][0]), str)
-        shell.reset()
-
-        self.assertRaises(TypeError, f.writelines)
-        self.assertEqual(shell.written, [])
-        self.assertRaises(TypeError, f.writelines, 123)
-        self.assertEqual(shell.written, [])
-        self.assertRaises(TypeError, f.writelines, [b'test'])
-        self.assertRaises(TypeError, f.writelines, [123])
-        self.assertEqual(shell.written, [])
-        self.assertRaises(TypeError, f.writelines, [], [])
-        self.assertEqual(shell.written, [])
-
-    def test_close(self):
-        shell = MockShell()
-        f = PseudoOutputFile(shell, 'stdout', 'utf-8')
-        self.assertFalse(f.closed)
-        f.write('test')
-        f.close()
-        self.assertTrue(f.closed)
-        self.assertRaises(ValueError, f.write, 'x')
-        self.assertEqual(shell.written, [('test', 'stdout')])
-        f.close()
-        self.assertRaises(TypeError, f.close, 1)
-
-
-class PseudeInputFilesTest(unittest.TestCase):
-    def test_misc(self):
-        shell = MockShell()
-        f = PseudoInputFile(shell, 'stdin', 'utf-8')
-        self.assertIsInstance(f, io.TextIOBase)
-        self.assertEqual(f.encoding, 'utf-8')
-        self.assertIsNone(f.errors)
-        self.assertIsNone(f.newlines)
-        self.assertEqual(f.name, '<stdin>')
-        self.assertFalse(f.closed)
-        self.assertTrue(f.isatty())
-        self.assertTrue(f.readable())
-        self.assertFalse(f.writable())
-        self.assertFalse(f.seekable())
-
-    def test_unsupported(self):
-        shell = MockShell()
-        f = PseudoInputFile(shell, 'stdin', 'utf-8')
-        self.assertRaises(OSError, f.fileno)
-        self.assertRaises(OSError, f.tell)
-        self.assertRaises(OSError, f.seek, 0)
-        self.assertRaises(OSError, f.write, 'x')
-        self.assertRaises(OSError, f.writelines, ['x'])
-
-    def test_read(self):
-        shell = MockShell()
-        f = PseudoInputFile(shell, 'stdin', 'utf-8')
-        shell.push(['one\n', 'two\n', ''])
-        self.assertEqual(f.read(), 'one\ntwo\n')
-        shell.push(['one\n', 'two\n', ''])
-        self.assertEqual(f.read(-1), 'one\ntwo\n')
-        shell.push(['one\n', 'two\n', ''])
-        self.assertEqual(f.read(None), 'one\ntwo\n')
-        shell.push(['one\n', 'two\n', 'three\n', ''])
-        self.assertEqual(f.read(2), 'on')
-        self.assertEqual(f.read(3), 'e\nt')
-        self.assertEqual(f.read(10), 'wo\nthree\n')
-
-        shell.push(['one\n', 'two\n'])
-        self.assertEqual(f.read(0), '')
-        self.assertRaises(TypeError, f.read, 1.5)
-        self.assertRaises(TypeError, f.read, '1')
-        self.assertRaises(TypeError, f.read, 1, 1)
-
-    def test_readline(self):
-        shell = MockShell()
-        f = PseudoInputFile(shell, 'stdin', 'utf-8')
-        shell.push(['one\n', 'two\n', 'three\n', 'four\n'])
-        self.assertEqual(f.readline(), 'one\n')
-        self.assertEqual(f.readline(-1), 'two\n')
-        self.assertEqual(f.readline(None), 'three\n')
-        shell.push(['one\ntwo\n'])
-        self.assertEqual(f.readline(), 'one\n')
-        self.assertEqual(f.readline(), 'two\n')
-        shell.push(['one', 'two', 'three'])
-        self.assertEqual(f.readline(), 'one')
-        self.assertEqual(f.readline(), 'two')
-        shell.push(['one\n', 'two\n', 'three\n'])
-        self.assertEqual(f.readline(2), 'on')
-        self.assertEqual(f.readline(1), 'e')
-        self.assertEqual(f.readline(1), '\n')
-        self.assertEqual(f.readline(10), 'two\n')
-
-        shell.push(['one\n', 'two\n'])
-        self.assertEqual(f.readline(0), '')
-        self.assertRaises(TypeError, f.readlines, 1.5)
-        self.assertRaises(TypeError, f.readlines, '1')
-        self.assertRaises(TypeError, f.readlines, 1, 1)
-
-    def test_readlines(self):
-        shell = MockShell()
-        f = PseudoInputFile(shell, 'stdin', 'utf-8')
-        shell.push(['one\n', 'two\n', ''])
-        self.assertEqual(f.readlines(), ['one\n', 'two\n'])
-        shell.push(['one\n', 'two\n', ''])
-        self.assertEqual(f.readlines(-1), ['one\n', 'two\n'])
-        shell.push(['one\n', 'two\n', ''])
-        self.assertEqual(f.readlines(None), ['one\n', 'two\n'])
-        shell.push(['one\n', 'two\n', ''])
-        self.assertEqual(f.readlines(0), ['one\n', 'two\n'])
-        shell.push(['one\n', 'two\n', ''])
-        self.assertEqual(f.readlines(3), ['one\n'])
-        shell.push(['one\n', 'two\n', ''])
-        self.assertEqual(f.readlines(4), ['one\n', 'two\n'])
-
-        shell.push(['one\n', 'two\n', ''])
-        self.assertRaises(TypeError, f.readlines, 1.5)
-        self.assertRaises(TypeError, f.readlines, '1')
-        self.assertRaises(TypeError, f.readlines, 1, 1)
-
-    def test_close(self):
-        shell = MockShell()
-        f = PseudoInputFile(shell, 'stdin', 'utf-8')
-        shell.push(['one\n', 'two\n', ''])
-        self.assertFalse(f.closed)
-        self.assertEqual(f.readline(), 'one\n')
-        f.close()
-        self.assertFalse(f.closed)
-        self.assertEqual(f.readline(), 'two\n')
-        self.assertRaises(TypeError, f.close, 1)
+from idlelib import iomenu
+import unittest
+from test.support import requires
+from tkinter import Tk
+
+from idlelib.editor import EditorWindow
+
+
+class IOBindigTest(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        requires('gui')
+        cls.root = Tk()
+        cls.root.withdraw()
+        cls.editwin = EditorWindow(root=cls.root)
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.editwin._close()
+        del cls.editwin
+        cls.root.update_idletasks()
+        for id in cls.root.tk.call('after', 'info'):
+            cls.root.after_cancel(id)  # Need for EditorWindow.
+        cls.root.destroy()
+        del cls.root
+
+    def test_init(self):
+        io = iomenu.IOBinding(self.editwin)
+        self.assertIs(io.editwin, self.editwin)
+        io.close
 
 
 if __name__ == '__main__':

Lib/idlelib/idle_test/test_macosx.py

@@ -1,11 +1,9 @@
-'''Test idlelib.macosx.py.
+"Test macosx, coverage 45% on Windows."
 
-Coverage: 71% on Windows.
-'''
 from idlelib import macosx
+import unittest
 from test.support import requires
 import tkinter as tk
-import unittest
 import unittest.mock as mock
 from idlelib.filelist import FileList
 

Lib/idlelib/idle_test/test_mainmenu.py

@@ -0,0 +1,21 @@
+"Test mainmenu, coverage 100%."
+# Reported as 88%; mocking turtledemo absence would have no point.
+
+from idlelib import mainmenu
+import unittest
+
+
+class MainMenuTest(unittest.TestCase):
+
+    def test_menudefs(self):
+        actual = [item[0] for item in mainmenu.menudefs]
+        expect = ['file', 'edit', 'format', 'run', 'shell',
+                  'debug', 'options', 'windows', 'help']
+        self.assertEqual(actual, expect)
+
+    def test_default_keydefs(self):
+        self.assertGreaterEqual(len(mainmenu.default_keydefs), 50)
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)