bpo-36419: IDLE - Refactor autocompete and improve testing. (GH-15121)

(cherry picked from commit 1213123005d9f94bb5027c0a5256ea4d3e97b61d)

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

1 files changed, 149 insertions, 99 deletions

diff --git a/Lib/idlelib/idle_test/test_autocomplete.py b/Lib/idlelib/idle_test/test_autocomplete.py
index 6181b29..2c478cd 100644
--- a/Lib/idlelib/idle_test/test_autocomplete.py
+++ b/Lib/idlelib/idle_test/test_autocomplete.py
@@ -1,4 +1,4 @@
-"Test autocomplete, coverage 87%."
+"Test autocomplete, coverage 93%."
 
 import unittest
 from unittest.mock import Mock, patch
@@ -45,127 +45,177 @@ class AutoCompleteTest(unittest.TestCase):
 
     def test_init(self):
         self.assertEqual(self.autocomplete.editwin, self.editor)
+        self.assertEqual(self.autocomplete.text, self.text)
 
     def test_make_autocomplete_window(self):
         testwin = self.autocomplete._make_autocomplete_window()
         self.assertIsInstance(testwin, acw.AutoCompleteWindow)
 
     def test_remove_autocomplete_window(self):
-        self.autocomplete.autocompletewindow = (
-            self.autocomplete._make_autocomplete_window())
-        self.autocomplete._remove_autocomplete_window()
-        self.assertIsNone(self.autocomplete.autocompletewindow)
+        acp = self.autocomplete
+        acp.autocompletewindow = m = Mock()
+        acp._remove_autocomplete_window()
+        m.hide_window.assert_called_once()
+        self.assertIsNone(acp.autocompletewindow)
 
     def test_force_open_completions_event(self):
-        # Test that force_open_completions_event calls _open_completions.
-        o_cs = Func()
-        self.autocomplete.open_completions = o_cs
-        self.autocomplete.force_open_completions_event('event')
-        self.assertEqual(o_cs.args, (True, False, True))
-
-    def test_try_open_completions_event(self):
-        Equal = self.assertEqual
-        autocomplete = self.autocomplete
-        trycompletions = self.autocomplete.try_open_completions_event
-        o_c_l = Func()
-        autocomplete._open_completions_later = o_c_l
-
-        # _open_completions_later should not be called with no text in editor.
-        trycompletions('event')
-        Equal(o_c_l.args, None)
-
-        # _open_completions_later should be called with COMPLETE_ATTRIBUTES (1).
-        self.text.insert('1.0', 're.')
-        trycompletions('event')
-        Equal(o_c_l.args, (False, False, False, 1))
-
-        # _open_completions_later should be called with COMPLETE_FILES (2).
-        self.text.delete('1.0', 'end')
-        self.text.insert('1.0', '"./Lib/')
-        trycompletions('event')
-        Equal(o_c_l.args, (False, False, False, 2))
+        # Call _open_completions and break.
+        acp = self.autocomplete
+        open_c = Func()
+        acp.open_completions = open_c
+        self.assertEqual(acp.force_open_completions_event('event'), 'break')
+        self.assertEqual(open_c.args[0], ac.FORCE)
 
     def test_autocomplete_event(self):
         Equal = self.assertEqual
-        autocomplete = self.autocomplete
+        acp = self.autocomplete
 
-        # Test that the autocomplete event is ignored if user is pressing a
-        # modifier key in addition to the tab key.
+        # Result of autocomplete event: If modified tab, None.
         ev = Event(mc_state=True)
-        self.assertIsNone(autocomplete.autocomplete_event(ev))
+        self.assertIsNone(acp.autocomplete_event(ev))
         del ev.mc_state
 
-        # Test that tab after whitespace is ignored.
+        # If tab after whitespace, None.
         self.text.insert('1.0', '        """Docstring.\n    ')
-        self.assertIsNone(autocomplete.autocomplete_event(ev))
+        self.assertIsNone(acp.autocomplete_event(ev))
         self.text.delete('1.0', 'end')
 
-        # If autocomplete window is open, complete() method is called.
+        # If active autocomplete window, complete() and 'break'.
         self.text.insert('1.0', 're.')
-        # This must call autocomplete._make_autocomplete_window().
-        Equal(self.autocomplete.autocomplete_event(ev), 'break')
-
-        # If autocomplete window is not active or does not exist,
-        # open_completions is called. Return depends on its return.
-        autocomplete._remove_autocomplete_window()
-        o_cs = Func()  # .result = None.
-        autocomplete.open_completions = o_cs
-        Equal(self.autocomplete.autocomplete_event(ev), None)
-        Equal(o_cs.args, (False, True, True))
-        o_cs.result = True
-        Equal(self.autocomplete.autocomplete_event(ev), 'break')
-        Equal(o_cs.args, (False, True, True))
-
-    def test_open_completions_later(self):
-        # Test that autocomplete._delayed_completion_id is set.
+        acp.autocompletewindow = mock = Mock()
+        mock.is_active = Mock(return_value=True)
+        Equal(acp.autocomplete_event(ev), 'break')
+        mock.complete.assert_called_once()
+        acp.autocompletewindow = None
+
+        # If no active autocomplete window, open_completions(), None/break.
+        open_c = Func(result=False)
+        acp.open_completions = open_c
+        Equal(acp.autocomplete_event(ev), None)
+        Equal(open_c.args[0], ac.TAB)
+        open_c.result = True
+        Equal(acp.autocomplete_event(ev), 'break')
+        Equal(open_c.args[0], ac.TAB)
+
+    def test_try_open_completions_event(self):
+        Equal = self.assertEqual
+        text = self.text
         acp = self.autocomplete
+        trycompletions = acp.try_open_completions_event
+        after = Func(result='after1')
+        acp.text.after = after
+
+        # If no text or trigger, after not called.
+        trycompletions()
+        Equal(after.called, 0)
+        text.insert('1.0', 're')
+        trycompletions()
+        Equal(after.called, 0)
+
+        # Attribute needed, no existing callback.
+        text.insert('insert', ' re.')
         acp._delayed_completion_id = None
-        acp._open_completions_later(False, False, False, ac.COMPLETE_ATTRIBUTES)
+        trycompletions()
+        Equal(acp._delayed_completion_index, text.index('insert'))
+        Equal(after.args,
+              (acp.popupwait, acp._delayed_open_completions, ac.TRY_A))
         cb1 = acp._delayed_completion_id
-        self.assertTrue(cb1.startswith('after'))
-
-        # Test that cb1 is cancelled and cb2 is new.
-        acp._open_completions_later(False, False, False, ac.COMPLETE_FILES)
-        self.assertNotIn(cb1, self.root.tk.call('after', 'info'))
-        cb2 = acp._delayed_completion_id
-        self.assertTrue(cb2.startswith('after') and cb2 != cb1)
-        self.text.after_cancel(cb2)
+        Equal(cb1, 'after1')
+
+        # File needed, existing callback cancelled.
+        text.insert('insert', ' "./Lib/')
+        after.result = 'after2'
+        cancel = Func()
+        acp.text.after_cancel = cancel
+        trycompletions()
+        Equal(acp._delayed_completion_index, text.index('insert'))
+        Equal(cancel.args, (cb1,))
+        Equal(after.args,
+              (acp.popupwait, acp._delayed_open_completions, ac.TRY_F))
+        Equal(acp._delayed_completion_id, 'after2')
 
     def test_delayed_open_completions(self):
-        # Test that autocomplete._delayed_completion_id set to None
-        # and that open_completions is not called if the index is not
-        # equal to _delayed_completion_index.
+        Equal = self.assertEqual
         acp = self.autocomplete
-        acp.open_completions = Func()
+        open_c = Func()
+        acp.open_completions = open_c
+        self.text.insert('1.0', '"dict.')
+
+        # Set autocomplete._delayed_completion_id to None.
+        # Text index changed, don't call open_completions.
         acp._delayed_completion_id = 'after'
         acp._delayed_completion_index = self.text.index('insert+1c')
-        acp._delayed_open_completions(1, 2, 3)
+        acp._delayed_open_completions('dummy')
         self.assertIsNone(acp._delayed_completion_id)
-        self.assertEqual(acp.open_completions.called, 0)
+        Equal(open_c.called, 0)
 
-        # Test that open_completions is called if indexes match.
+        # Text index unchanged, call open_completions.
         acp._delayed_completion_index = self.text.index('insert')
-        acp._delayed_open_completions(1, 2, 3, ac.COMPLETE_FILES)
-        self.assertEqual(acp.open_completions.args, (1, 2, 3, 2))
+        acp._delayed_open_completions((1, 2, 3, ac.FILES))
+        self.assertEqual(open_c.args[0], (1, 2, 3, ac.FILES))
+
+    def test_oc_cancel_comment(self):
+        none = self.assertIsNone
+        acp = self.autocomplete
+
+        # Comment is in neither code or string.
+        acp._delayed_completion_id = 'after'
+        after = Func(result='after')
+        acp.text.after_cancel = after
+        self.text.insert(1.0, '# comment')
+        none(acp.open_completions(ac.TAB))  # From 'else' after 'elif'.
+        none(acp._delayed_completion_id)
+
+    def test_oc_no_list(self):
+        acp = self.autocomplete
+        fetch = Func(result=([],[]))
+        acp.fetch_completions = fetch
+        self.text.insert('1.0', 'object')
+        self.assertIsNone(acp.open_completions(ac.TAB))
+        self.text.insert('insert', '.')
+        self.assertIsNone(acp.open_completions(ac.TAB))
+        self.assertEqual(fetch.called, 2)
+
+
+    def test_open_completions_none(self):
+        # Test other two None returns.
+        none = self.assertIsNone
+        acp = self.autocomplete
+
+        # No object for attributes or need call not allowed.
+        self.text.insert(1.0, '.')
+        none(acp.open_completions(ac.TAB))
+        self.text.insert('insert', ' int().')
+        none(acp.open_completions(ac.TAB))
+
+        # Blank or quote trigger 'if complete ...'.
+        self.text.delete(1.0, 'end')
+        self.assertFalse(acp.open_completions(ac.TAB))
+        self.text.insert('1.0', '"')
+        self.assertFalse(acp.open_completions(ac.TAB))
+        self.text.delete('1.0', 'end')
+
+    class dummy_acw():
+        __init__ = Func()
+        show_window = Func(result=False)
+        hide_window = Func()
 
     def test_open_completions(self):
-        # Test completions of files and attributes as well as non-completion
-        # of errors.
-        self.text.insert('1.0', 'pr')
-        self.assertTrue(self.autocomplete.open_completions(False, True, True))
+        # Test completions of files and attributes.
+        acp = self.autocomplete
+        fetch = Func(result=(['tem'],['tem', '_tem']))
+        acp.fetch_completions = fetch
+        def make_acw(): return self.dummy_acw()
+        acp._make_autocomplete_window = make_acw
+
+        self.text.insert('1.0', 'int.')
+        acp.open_completions(ac.TAB)
+        self.assertIsInstance(acp.autocompletewindow, self.dummy_acw)
         self.text.delete('1.0', 'end')
 
         # Test files.
         self.text.insert('1.0', '"t')
-        #self.assertTrue(self.autocomplete.open_completions(False, True, True))
-        self.text.delete('1.0', 'end')
-
-        # Test with blank will fail.
-        self.assertFalse(self.autocomplete.open_completions(False, True, True))
-
-        # Test with only string quote will fail.
-        self.text.insert('1.0', '"')
-        self.assertFalse(self.autocomplete.open_completions(False, True, True))
+        self.assertTrue(acp.open_completions(ac.TAB))
         self.text.delete('1.0', 'end')
 
     def test_fetch_completions(self):
@@ -174,21 +224,21 @@ class AutoCompleteTest(unittest.TestCase):
         # a small list containing non-private variables.
         # For file completion, a large list containing all files in the path,
         # and a small list containing files that do not start with '.'.
-        autocomplete = self.autocomplete
-        small, large = self.autocomplete.fetch_completions(
-                '', ac.COMPLETE_ATTRIBUTES)
+        acp = self.autocomplete
+        small, large = acp.fetch_completions(
+                '', ac.ATTRS)
         if __main__.__file__ != ac.__file__:
             self.assertNotIn('AutoComplete', small)  # See issue 36405.
 
         # Test attributes
-        s, b = autocomplete.fetch_completions('', ac.COMPLETE_ATTRIBUTES)
+        s, b = acp.fetch_completions('', ac.ATTRS)
         self.assertLess(len(small), len(large))
         self.assertTrue(all(filter(lambda x: x.startswith('_'), s)))
         self.assertTrue(any(filter(lambda x: x.startswith('_'), b)))
 
         # Test smalll should respect to __all__.
         with patch.dict('__main__.__dict__', {'__all__': ['a', 'b']}):
-            s, b = autocomplete.fetch_completions('', ac.COMPLETE_ATTRIBUTES)
+            s, b = acp.fetch_completions('', ac.ATTRS)
             self.assertEqual(s, ['a', 'b'])
             self.assertIn('__name__', b)    # From __main__.__dict__
             self.assertIn('sum', b)         # From __main__.__builtins__.__dict__
@@ -197,7 +247,7 @@ class AutoCompleteTest(unittest.TestCase):
         mock = Mock()
         mock._private = Mock()
         with patch.dict('__main__.__dict__', {'foo': mock}):
-            s, b = autocomplete.fetch_completions('foo', ac.COMPLETE_ATTRIBUTES)
+            s, b = acp.fetch_completions('foo', ac.ATTRS)
             self.assertNotIn('_private', s)
             self.assertIn('_private', b)
             self.assertEqual(s, [i for i in sorted(dir(mock)) if i[:1] != '_'])
@@ -211,36 +261,36 @@ class AutoCompleteTest(unittest.TestCase):
             return ['monty', 'python', '.hidden']
 
         with patch.object(os, 'listdir', _listdir):
-            s, b = autocomplete.fetch_completions('', ac.COMPLETE_FILES)
+            s, b = acp.fetch_completions('', ac.FILES)
             self.assertEqual(s, ['bar', 'foo'])
             self.assertEqual(b, ['.hidden', 'bar', 'foo'])
 
-            s, b = autocomplete.fetch_completions('~', ac.COMPLETE_FILES)
+            s, b = acp.fetch_completions('~', ac.FILES)
             self.assertEqual(s, ['monty', 'python'])
             self.assertEqual(b, ['.hidden', 'monty', 'python'])
 
     def test_get_entity(self):
         # Test that a name is in the namespace of sys.modules and
         # __main__.__dict__.
-        autocomplete = self.autocomplete
+        acp = self.autocomplete
         Equal = self.assertEqual
 
-        Equal(self.autocomplete.get_entity('int'), int)
+        Equal(acp.get_entity('int'), int)
 
         # Test name from sys.modules.
         mock = Mock()
         with patch.dict('sys.modules', {'tempfile': mock}):
-            Equal(autocomplete.get_entity('tempfile'), mock)
+            Equal(acp.get_entity('tempfile'), mock)
 
         # Test name from __main__.__dict__.
         di = {'foo': 10, 'bar': 20}
         with patch.dict('__main__.__dict__', {'d': di}):
-            Equal(autocomplete.get_entity('d'), di)
+            Equal(acp.get_entity('d'), di)
 
         # Test name not in namespace.
         with patch.dict('__main__.__dict__', {}):
             with self.assertRaises(NameError):
-                autocomplete.get_entity('not_exist')
+                acp.get_entity('not_exist')
 
 
 if __name__ == '__main__':