bpo-33855: Still more edits and minimal tests for IDLE (pythonGH-7784)

Part 3 of 3, continuing PR python#7689. This covers 14 idlelib modules and their tests,
rpc to zoomheight except for run (already done) and tooltip (being done separately).

Author: terryjreedy

Lib/idlelib/autoexpand.py

@@ -92,5 +92,5 @@ def getprevword(self):
 
 
 if __name__ == '__main__':
-    import unittest
-    unittest.main('idlelib.idle_test.test_autoexpand', verbosity=2)
+    from unittest import main
+    main('idlelib.idle_test.test_autoexpand', verbosity=2)

Lib/idlelib/codecontext.py

@@ -233,6 +233,8 @@ def config_timer_event(self):
 CodeContext.reload()
 
 
-if __name__ == "__main__":  # pragma: no cover
-    import unittest
-    unittest.main('idlelib.idle_test.test_codecontext', verbosity=2, exit=False)
+if __name__ == "__main__":
+    from unittest import main
+    main('idlelib.idle_test.test_codecontext', verbosity=2, exit=False)
+
+    # Add htest.

Lib/idlelib/config.py

@@ -925,7 +925,7 @@ def dumpCfg(cfg):
     print('\nlines = ', line, ', crc = ', crc, sep='')
 
 if __name__ == '__main__':
-    import unittest
-    unittest.main('idlelib.idle_test.test_config',
-                  verbosity=2, exit=False)
-    #_dump()
+    from unittest import main
+    main('idlelib.idle_test.test_config', verbosity=2, exit=False)
+
+    # Run revised _dump() as htest?

Lib/idlelib/config_key.py

@@ -291,8 +291,8 @@ def bind_ok(self, keys):
 
 
 if __name__ == '__main__':
-    import unittest
-    unittest.main('idlelib.idle_test.test_config_key', verbosity=2, exit=False)
+    from unittest import main
+    main('idlelib.idle_test.test_config_key', verbosity=2, exit=False)
 
     from idlelib.idle_test.htest import run
     run(GetKeysDialog)

Lib/idlelib/configdialog.py

@@ -2269,8 +2269,8 @@ def _configure_canvas(event):
 
 
 if __name__ == '__main__':
-    import unittest
-    unittest.main('idlelib.idle_test.test_configdialog',
-                  verbosity=2, exit=False)
+    from unittest import main
+    main('idlelib.idle_test.test_configdialog', verbosity=2, exit=False)
+
     from idlelib.idle_test.htest import run
     run(ConfigDialog)

Lib/idlelib/idle_test/test_codecontext.py

@@ -2,10 +2,10 @@
 
 from idlelib import codecontext
 import unittest
-from unittest import mock
 from test.support import requires
 from tkinter import Tk, Frame, Text, TclError
 
+from unittest import mock
 import re
 from idlelib import config
 

Lib/idlelib/idle_test/test_rpc.py

@@ -0,0 +1,30 @@
+"Test rpc, coverage 20%."
+
+from idlelib import rpc
+import unittest
+
+import marshal
+
+
+class CodePicklerTest(unittest.TestCase):
+
+    def test_pickle_unpickle(self):
+        def f(): return a + b + c
+        func, (cbytes,) = rpc.pickle_code(f.__code__)
+        self.assertIs(func, rpc.unpickle_code)
+        self.assertIn(b'test_rpc.py', cbytes)
+        code = rpc.unpickle_code(cbytes)
+        self.assertEqual(code.co_names, ('a', 'b', 'c'))
+
+    def test_code_pickler(self):
+        self.assertIn(type((lambda:None).__code__),
+                      rpc.CodePickler.dispatch_table)
+
+    def test_dumps(self):
+        def f(): pass
+        # The main test here is that pickling code does not raise.
+        self.assertIn(b'test_rpc.py', rpc.dumps(f.__code__))
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)

Lib/idlelib/idle_test/test_rstrip.py

@@ -1,13 +1,15 @@
+"Test rstrip, coverage 100%."
+
+from idlelib import rstrip
 import unittest
-import idlelib.rstrip as rs
 from idlelib.idle_test.mock_idle import Editor
 
 class rstripTest(unittest.TestCase):
 
     def test_rstrip_line(self):
         editor = Editor()
         text = editor.text
-        do_rstrip = rs.RstripExtension(editor).do_rstrip
+        do_rstrip = rstrip.RstripExtension(editor).do_rstrip
 
         do_rstrip()
         self.assertEqual(text.get('1.0', 'insert'), '')
@@ -20,12 +22,12 @@ def test_rstrip_line(self):
 
     def test_rstrip_multiple(self):
         editor = Editor()
-        #  Uncomment following to verify that test passes with real widgets.
-##        from idlelib.editor import EditorWindow as Editor
-##        from tkinter import Tk
-##        editor = Editor(root=Tk())
+        #  Comment above, uncomment 3 below to test with real Editor & Text.
+        #from idlelib.editor import EditorWindow as Editor
+        #from tkinter import Tk
+        #editor = Editor(root=Tk())
         text = editor.text
-        do_rstrip = rs.RstripExtension(editor).do_rstrip
+        do_rstrip = rstrip.RstripExtension(editor).do_rstrip
 
         original = (
             "Line with an ending tab    \n"
@@ -45,5 +47,7 @@ def test_rstrip_multiple(self):
         do_rstrip()
         self.assertEqual(text.get('1.0', 'insert'), stripped)
 
+
+
 if __name__ == '__main__':
-    unittest.main(verbosity=2, exit=False)
+    unittest.main(verbosity=2)

Lib/idlelib/idle_test/test_runscript.py

@@ -0,0 +1,33 @@
+"Test runscript, coverage 16%."
+
+from idlelib import runscript
+import unittest
+from test.support import requires
+from tkinter import Tk
+from idlelib.editor import EditorWindow
+
+
+class ScriptBindingTest(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        requires('gui')
+        cls.root = Tk()
+        cls.root.withdraw()
+
+    @classmethod
+    def tearDownClass(cls):
+        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):
+        ew = EditorWindow(root=self.root)
+        sb = runscript.ScriptBinding(ew)
+        ew._close()
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)

Lib/idlelib/idle_test/test_scrolledlist.py

@@ -1,11 +1,9 @@
-''' Test idlelib.scrolledlist.
+"Test scrolledlist, coverage 38%."
 
-Coverage: 39%
-'''
-from idlelib import scrolledlist
+from idlelib.scrolledlist import ScrolledList
+import unittest
 from test.support import requires
 requires('gui')
-import unittest
 from tkinter import Tk
 
 
@@ -22,7 +20,7 @@ def tearDownClass(cls):
 
 
     def test_init(self):
-        scrolledlist.ScrolledList(self.root)
+        ScrolledList(self.root)
 
 
 if __name__ == '__main__':

Lib/idlelib/idle_test/test_search.py

@@ -1,36 +1,34 @@
-"""Test SearchDialog class in idlelib.search.py"""
+"Test search, coverage 69%."
+
+from idlelib import search
+import unittest
+from test.support import requires
+requires('gui')
+from tkinter import Tk, Text, BooleanVar
+from idlelib import searchengine
 
 # Does not currently test the event handler wrappers.
 # A usage test should simulate clicks and check highlighting.
 # Tests need to be coordinated with SearchDialogBase tests
 # to avoid duplication.
 
-from test.support import requires
-requires('gui')
-
-import unittest
-import tkinter as tk
-from tkinter import BooleanVar
-import idlelib.searchengine as se
-import idlelib.search as sd
-
 
 class SearchDialogTest(unittest.TestCase):
 
     @classmethod
     def setUpClass(cls):
-        cls.root = tk.Tk()
+        cls.root = Tk()
 
     @classmethod
     def tearDownClass(cls):
         cls.root.destroy()
         del cls.root
 
     def setUp(self):
-        self.engine = se.SearchEngine(self.root)
-        self.dialog = sd.SearchDialog(self.root, self.engine)
+        self.engine = searchengine.SearchEngine(self.root)
+        self.dialog = search.SearchDialog(self.root, self.engine)
         self.dialog.bell = lambda: None
-        self.text = tk.Text(self.root)
+        self.text = Text(self.root)
         self.text.insert('1.0', 'Hello World!')
 
     def test_find_again(self):

Lib/idlelib/idle_test/test_searchbase.py

@@ -1,8 +1,7 @@
-'''tests idlelib.searchbase.
+"Test searchbase, coverage 98%."
+# The only thing not covered is inconsequential --
+# testing skipping of suite when self.needwrapbutton is false.
 
-Coverage: 99%. The only thing not covered is inconsequential --
-testing skipping of suite when self.needwrapbutton is false.
-'''
 import unittest
 from test.support import requires
 from tkinter import Tk, Frame  ##, BooleanVar, StringVar
@@ -22,6 +21,7 @@
 ##    se.BooleanVar = BooleanVar
 ##    se.StringVar = StringVar
 
+
 class SearchDialogBaseTest(unittest.TestCase):
 
     @classmethod

Lib/idlelib/idle_test/test_searchengine.py

@@ -1,18 +1,19 @@
-'''Test functions and SearchEngine class in idlelib.searchengine.py.'''
+"Test searchengine, coverage 99%."
 
-# With mock replacements, the module does not use any gui widgets.
-# The use of tk.Text is avoided (for now, until mock Text is improved)
-# by patching instances with an index function returning what is needed.
-# This works because mock Text.get does not use .index.
-
-import re
+from idlelib import searchengine as se
 import unittest
 # from test.support import requires
 from tkinter import  BooleanVar, StringVar, TclError  # ,Tk, Text
 import tkinter.messagebox as tkMessageBox
-from idlelib import searchengine as se
 from idlelib.idle_test.mock_tk import Var, Mbox
 from idlelib.idle_test.mock_tk import Text as mockText
+import re
+
+# With mock replacements, the module does not use any gui widgets.
+# The use of tk.Text is avoided (for now, until mock Text is improved)
+# by patching instances with an index function returning what is needed.
+# This works because mock Text.get does not use .index.
+# The tkinter imports are used to restore searchengine.
 
 def setUpModule():
     # Replace s-e module tkinter imports other than non-gui TclError.
@@ -326,4 +327,4 @@ def test_search_backward(self):
 
 
 if __name__ == '__main__':
-    unittest.main(verbosity=2, exit=2)
+    unittest.main(verbosity=2)

Lib/idlelib/idle_test/test_stackviewer.py

@@ -0,0 +1,36 @@
+"Test stackviewer, coverage 19%."
+
+from idlelib import stackviewer
+import unittest
+from test.support import requires
+from tkinter import Tk
+
+
+class Test(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        requires('gui')
+        cls.root = Tk()
+        cls.root.withdraw()
+
+    @classmethod
+    def tearDownClass(cls):
+        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):
+        try:
+            zzz
+        except NameError as e:
+            ex = e
+# Test runners suppress setting of sys.last_xyx, which stackviewer needs.
+# Revise stackviewer so following works.
+#        stackviewer.StackBrowser(self.root, ex=exc)
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)

Lib/idlelib/idle_test/test_statusbar.py

@@ -0,0 +1,41 @@
+"Test statusbar, coverage 100%."
+
+from idlelib import statusbar
+import unittest
+from test.support import requires
+from tkinter import Tk
+
+
+class Test(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        requires('gui')
+        cls.root = Tk()
+        cls.root.withdraw()
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.root.update_idletasks()
+        cls.root.destroy()
+        del cls.root
+
+    def test_init(self):
+        bar = statusbar.MultiStatusBar(self.root)
+        self.assertEqual(bar.labels, {})
+
+    def test_set_label(self):
+        bar = statusbar.MultiStatusBar(self.root)
+        bar.set_label('left', text='sometext', width=10)
+        self.assertIn('left', bar.labels)
+        left = bar.labels['left']
+        self.assertEqual(left['text'], 'sometext')
+        self.assertEqual(left['width'], 10)
+        bar.set_label('left', text='revised text')
+        self.assertEqual(left['text'], 'revised text')
+        bar.set_label('right', text='correct text')
+        self.assertEqual(bar.labels['right']['text'], 'correct text')
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)