Prepare completer for pytest.

use proper unittest class with setup and teardown methods to capture
deprecation warnings; and move support classes and function outside of
the testcase definition.

Make all standalone functions methods.

Beyond this no code change.

IPython/core/tests/test_completer.py

@@ -109,943 +109,961 b' def test_line_split():'
     check_line_split(sp, [ map(str, p) for p in t] )
 
 
-def test_custom_completion_error():
-    """Test that errors from custom attribute completers are silenced."""
-    ip = get_ipython()
-    class A(object): pass
-    ip.user_ns['a'] = A()
-    
-    @complete_object.register(A)
-    def complete_A(a, existing_completions):
-        raise TypeError("this should be silenced")
-    
-    ip.complete("a.")
-
 
-def test_unicode_completions():
-    ip = get_ipython()
-    # Some strings that trigger different types of completion.  Check them both
-    # in str and unicode forms
-    s = ['ru', '%ru', 'cd /', 'floa', 'float(x)/']
-    for t in s + list(map(str, s)):
-        # We don't need to check exact completion values (they may change
-        # depending on the state of the namespace, but at least no exceptions
-        # should be thrown and the return value should be a pair of text, list
-        # values.
-        text, matches = ip.complete(t)
-        nt.assert_true(isinstance(text, str))
-        nt.assert_true(isinstance(matches, list))
-
-def test_latex_completions():
-    from IPython.core.latex_symbols import latex_symbols
-    import random
-    ip = get_ipython()
-    # Test some random unicode symbols
-    keys = random.sample(latex_symbols.keys(), 10)
-    for k in keys:
-        text, matches = ip.complete(k)
-        nt.assert_equal(len(matches),1)
-        nt.assert_equal(text, k)
-        nt.assert_equal(matches[0], latex_symbols[k])
-    # Test a more complex line
-    text, matches = ip.complete(u'print(\\alpha')
-    nt.assert_equal(text, u'\\alpha')
-    nt.assert_equal(matches[0], latex_symbols['\\alpha'])
-    # Test multiple matching latex symbols
-    text, matches = ip.complete(u'\\al')
-    nt.assert_in('\\alpha', matches)
-    nt.assert_in('\\aleph', matches)
-
-
-
-
-def test_back_latex_completion():
-    ip = get_ipython()
+class NamedInstanceMetaclass(type):
+    def __getitem__(cls, item):
+        return cls.get_instance(item)
 
-    # do not return more than 1 matches fro \beta, only the latex one.
-    name, matches = ip.complete('\\β')
-    nt.assert_equal(len(matches), 1)
-    nt.assert_equal(matches[0], '\\beta')
+class NamedInstanceClass(object, metaclass=NamedInstanceMetaclass):
+    def __init__(self, name):
+        if not hasattr(self.__class__, 'instances'):
+            self.__class__.instances = {}
+        self.__class__.instances[name] = self
 
-def test_back_unicode_completion():
-    ip = get_ipython()
-    
-    name, matches = ip.complete('\\Ⅴ')
-    nt.assert_equal(len(matches), 1)
-    nt.assert_equal(matches[0], '\\ROMAN NUMERAL FIVE')
+    @classmethod
+    def _ipython_key_completions_(cls):
+        return cls.instances.keys()
 
+    @classmethod
+    def get_instance(cls, name):
+        return cls.instances[name]
 
-def test_forward_unicode_completion():
-    ip = get_ipython()
-    
-    name, matches = ip.complete('\\ROMAN NUMERAL FIVE')
-    nt.assert_equal(len(matches), 1)
-    nt.assert_equal(matches[0], 'Ⅴ')
-
[e-mail] # now we have a completion for \jmath
[e-mail](sys.platform == 'win32', 'Fails if there is a C:\\j... path')
-def test_no_ascii_back_completion():
-    ip = get_ipython()
-    with TemporaryWorkingDirectory():  # Avoid any filename completions
-        # single ascii letter that don't have yet completions
-        for letter in 'jJ' :
-            name, matches = ip.complete('\\'+letter)
-            nt.assert_equal(matches, [])
+class KeyCompletable(object):
+    def __init__(self, things=()):
+        self.things = things
 
+    def _ipython_key_completions_(self):
+        return list(self.things)
 
 
+class TestCompleter(unittest.TestCase):
 
-class CompletionSplitterTestCase(unittest.TestCase):
     def setUp(self):
-        self.sp = completer.CompletionSplitter()
-
-    def test_delim_setting(self):
-        self.sp.delims = ' '
-        nt.assert_equal(self.sp.delims, ' ')
-        nt.assert_equal(self.sp._delim_expr, r'[\ ]')
-
-    def test_spaces(self):
-        """Test with only spaces as split chars."""
-        self.sp.delims = ' '
-        t = [('foo', '', 'foo'),
-             ('run foo', '', 'foo'),
-             ('run foo', 'bar', 'foo'),
-             ]
-        check_line_split(self.sp, t)
-
-
-def test_has_open_quotes1():
-    for s in ["'", "'''", "'hi' '"]:
-        nt.assert_equal(completer.has_open_quotes(s), "'")
-
-
-def test_has_open_quotes2():
-    for s in ['"', '"""', '"hi" "']:
-        nt.assert_equal(completer.has_open_quotes(s), '"')
-
-
-def test_has_open_quotes3():
-    for s in ["''", "''' '''", "'hi' 'ipython'"]:
-        nt.assert_false(completer.has_open_quotes(s))
-
-
-def test_has_open_quotes4():
-    for s in ['""', '""" """', '"hi" "ipython"']:
-        nt.assert_false(completer.has_open_quotes(s))
-
-
[e-mail](sys.platform == 'win32', "abspath completions fail on Windows")
-def test_abspath_file_completions():
-    ip = get_ipython()
-    with TemporaryDirectory() as tmpdir:
-        prefix = os.path.join(tmpdir, 'foo')
-        suffixes = ['1', '2']
-        names = [prefix+s for s in suffixes]
-        for n in names:
-            open(n, 'w').close()
-
-        # Check simple completion
-        c = ip.complete(prefix)[1]
-        nt.assert_equal(c, names)
-
-        # Now check with a function call
-        cmd = 'a = f("%s' % prefix
-        c = ip.complete(prefix, cmd)[1]
-        comp = [prefix+s for s in suffixes]
-        nt.assert_equal(c, comp)
-
-
-def test_local_file_completions():
-    ip = get_ipython()
-    with TemporaryWorkingDirectory():
-        prefix = './foo'
-        suffixes = ['1', '2']
-        names = [prefix+s for s in suffixes]
-        for n in names:
-            open(n, 'w').close()
+        """
+        We want to silence all PendingDeprecationWarning when testing the completer
+        """
+        self._assertwarns = self.assertWarns(PendingDeprecationWarning)
+        self._assertwarns.__enter__()
+
+    def tearDown(self):
+        try:
+            self._assertwarns.__exit__(None, None, None)
+        except AssertionError:
+            pass
+
+
+    def test_custom_completion_error(self):
+        """Test that errors from custom attribute completers are silenced."""
+        ip = get_ipython()
+        class A(object): pass
+        ip.user_ns['x'] = A()
+        
+        @complete_object.register(A)
+        def complete_A(a, existing_completions):
+            raise TypeError("this should be silenced")
+        
+        ip.complete("x.")
+
+    def test_unicode_completions(self):
+        ip = get_ipython()
+        # Some strings that trigger different types of completion.  Check them both
+        # in str and unicode forms
+        s = ['ru', '%ru', 'cd /', 'floa', 'float(x)/']
+        for t in s + list(map(str, s)):
+            # We don't need to check exact completion values (they may change
+            # depending on the state of the namespace, but at least no exceptions
+            # should be thrown and the return value should be a pair of text, list
+            # values.
+            text, matches = ip.complete(t)
+            nt.assert_true(isinstance(text, str))
+            nt.assert_true(isinstance(matches, list))
+
+    def test_latex_completions(self):
+        from IPython.core.latex_symbols import latex_symbols
+        import random
+        ip = get_ipython()
+        # Test some random unicode symbols
+        keys = random.sample(latex_symbols.keys(), 10)
+        for k in keys:
+            text, matches = ip.complete(k)
+            nt.assert_equal(len(matches),1)
+            nt.assert_equal(text, k)
+            nt.assert_equal(matches[0], latex_symbols[k])
+        # Test a more complex line
+        text, matches = ip.complete(u'print(\\alpha')
+        nt.assert_equal(text, u'\\alpha')
+        nt.assert_equal(matches[0], latex_symbols['\\alpha'])
+        # Test multiple matching latex symbols
+        text, matches = ip.complete(u'\\al')
+        nt.assert_in('\\alpha', matches)
+        nt.assert_in('\\aleph', matches)
+
+
+
+
+    def test_back_latex_completion(self):
+        ip = get_ipython()
+
+        # do not return more than 1 matches fro \beta, only the latex one.
+        name, matches = ip.complete('\\β')
+        nt.assert_equal(len(matches), 1)
+        nt.assert_equal(matches[0], '\\beta')
+
+    def test_back_unicode_completion(self):
+        ip = get_ipython()
+        
+        name, matches = ip.complete('\\Ⅴ')
+        nt.assert_equal(len(matches), 1)
+        nt.assert_equal(matches[0], '\\ROMAN NUMERAL FIVE')
 
-        # Check simple completion
-        c = ip.complete(prefix)[1]
-        nt.assert_equal(c, names)
 
-        # Now check with a function call
-        cmd = 'a = f("%s' % prefix
-        c = ip.complete(prefix, cmd)[1]
-        comp = set(prefix+s for s in suffixes)
-        nt.assert_true(comp.issubset(set(c)))
+    def test_forward_unicode_completion(self):
+        ip = get_ipython()
+        
+        name, matches = ip.complete('\\ROMAN NUMERAL FIVE')
+        nt.assert_equal(len(matches), 1)
+        nt.assert_equal(matches[0], 'Ⅴ')
+
+    @nt.nottest # now we have a completion for \jmath
+    @decorators.knownfailureif(sys.platform == 'win32', 'Fails if there is a C:\\j... path')
+    def test_no_ascii_back_completion(self):
+        ip = get_ipython()
+        with TemporaryWorkingDirectory():  # Avoid any filename completions
+            # single ascii letter that don't have yet completions
+            for letter in 'jJ' :
+                name, matches = ip.complete('\\'+letter)
+                nt.assert_equal(matches, [])
+
+
+
+
+    class CompletionSplitterTestCase(unittest.TestCase):
+        def setUp(self):
+            self.sp = completer.CompletionSplitter()
+
+        def test_delim_setting(self):
+            self.sp.delims = ' '
+            nt.assert_equal(self.sp.delims, ' ')
+            nt.assert_equal(self.sp._delim_expr, r'[\ ]')
+
+        def test_spaces(self):
+            """Test with only spaces as split chars."""
+            self.sp.delims = ' '
+            t = [('foo', '', 'foo'),
+                 ('run foo', '', 'foo'),
+                 ('run foo', 'bar', 'foo'),
+                 ]
+            check_line_split(self.sp, t)
 
 
-def test_quoted_file_completions():
-    ip = get_ipython()
-    with TemporaryWorkingDirectory():
-        name = "foo'bar"
-        open(name, 'w').close()
-
-        # Don't escape Windows
-        escaped = name if sys.platform == "win32" else "foo\\'bar"
-
-        # Single quote matches embedded single quote
-        text = "open('foo"
-        c = ip.Completer._complete(cursor_line=0,
-                                   cursor_pos=len(text),
-                                   full_text=text)[1]
-        nt.assert_equal(c, [escaped])
-
-        # Double quote requires no escape
-        text = 'open("foo'
-        c = ip.Completer._complete(cursor_line=0,
-                                   cursor_pos=len(text),
-                                   full_text=text)[1]
-        nt.assert_equal(c, [name])
-
-        # No quote requires an escape
-        text = '%ls foo'
-        c = ip.Completer._complete(cursor_line=0,
-                                   cursor_pos=len(text),
-                                   full_text=text)[1]
-        nt.assert_equal(c, [escaped])
-
-
-def test_jedi():
-    """
-    A couple of issue we had with Jedi
-    """
-    ip = get_ipython()
+    def test_has_open_quotes1(self):
+        for s in ["'", "'''", "'hi' '"]:
+            nt.assert_equal(completer.has_open_quotes(s), "'")
+
+
+    def test_has_open_quotes2(self):
+        for s in ['"', '"""', '"hi" "']:
+            nt.assert_equal(completer.has_open_quotes(s), '"')
+
+
+    def test_has_open_quotes3(self):
+        for s in ["''", "''' '''", "'hi' 'ipython'"]:
+            nt.assert_false(completer.has_open_quotes(s))
+
+
+    def test_has_open_quotes4(self):
+        for s in ['""', '""" """', '"hi" "ipython"']:
+            nt.assert_false(completer.has_open_quotes(s))
+
+
+    @decorators.knownfailureif(sys.platform == 'win32', "abspath completions fail on Windows")
+    def test_abspath_file_completions(self):
+        ip = get_ipython()
+        with TemporaryDirectory() as tmpdir:
+            prefix = os.path.join(tmpdir, 'foo')
+            suffixes = ['1', '2']
+            names = [prefix+s for s in suffixes]
+            for n in names:
+                open(n, 'w').close()
+
+            # Check simple completion
+            c = ip.complete(prefix)[1]
+            nt.assert_equal(c, names)
+
+            # Now check with a function call
+            cmd = 'a = f("%s' % prefix
+            c = ip.complete(prefix, cmd)[1]
+            comp = [prefix+s for s in suffixes]
+            nt.assert_equal(c, comp)
+
+
+    def test_local_file_completions(self):
+        ip = get_ipython()
+        with TemporaryWorkingDirectory():
+            prefix = './foo'
+            suffixes = ['1', '2']
+            names = [prefix+s for s in suffixes]
+            for n in names:
+                open(n, 'w').close()
+
+            # Check simple completion
+            c = ip.complete(prefix)[1]
+            nt.assert_equal(c, names)
+
+            # Now check with a function call
+            cmd = 'a = f("%s' % prefix
+            c = ip.complete(prefix, cmd)[1]
+            comp = set(prefix+s for s in suffixes)
+            nt.assert_true(comp.issubset(set(c)))
+
+
+    def test_quoted_file_completions(self):
+        ip = get_ipython()
+        with TemporaryWorkingDirectory():
+            name = "foo'bar"
+            open(name, 'w').close()
+
+            # Don't escape Windows
+            escaped = name if sys.platform == "win32" else "foo\\'bar"
+
+            # Single quote matches embedded single quote
+            text = "open('foo"
+            c = ip.Completer._complete(cursor_line=0,
+                                       cursor_pos=len(text),
+                                       full_text=text)[1]
+            nt.assert_equal(c, [escaped])
+
+            # Double quote requires no escape
+            text = 'open("foo'
+            c = ip.Completer._complete(cursor_line=0,
+                                       cursor_pos=len(text),
+                                       full_text=text)[1]
+            nt.assert_equal(c, [name])
+
+            # No quote requires an escape
+            text = '%ls foo'
+            c = ip.Completer._complete(cursor_line=0,
+                                       cursor_pos=len(text),
+                                       full_text=text)[1]
+            nt.assert_equal(c, [escaped])
+
+
+    def test_jedi(self):
+        """
+        A couple of issue we had with Jedi
+        """
+        ip = get_ipython()
+
+        def _test_complete(reason, s, comp, start=None, end=None):
+            l = len(s)
+            start = start if start is not None else l
+            end = end if end is not None else l
+            with provisionalcompleter():
+                ip.Completer.use_jedi = True
+                completions = set(ip.Completer.completions(s, l))
+                ip.Completer.use_jedi = False
+                assert_in(Completion(start, end, comp), completions, reason)
 
-    def _test_complete(reason, s, comp, start=None, end=None):
-        l = len(s)
-        start = start if start is not None else l
-        end = end if end is not None else l
+        def _test_not_complete(reason, s, comp):
+            l = len(s)
+            with provisionalcompleter():
+                ip.Completer.use_jedi = True
+                completions = set(ip.Completer.completions(s, l))
+                ip.Completer.use_jedi = False
+                assert_not_in(Completion(l, l, comp), completions, reason)
+
+        import jedi
+        jedi_version = tuple(int(i) for i in jedi.__version__.split('.')[:3])
+        if jedi_version > (0, 10):
+            yield _test_complete, 'jedi >0.9 should complete and not crash', 'a=1;a.', 'real'
+        yield _test_complete, 'can infer first argument', 'a=(1,"foo");a[0].', 'real'
+        yield _test_complete, 'can infer second argument', 'a=(1,"foo");a[1].', 'capitalize'
+        yield _test_complete, 'cover duplicate completions', 'im', 'import', 0, 2
+
+        yield _test_not_complete, 'does not mix types', 'a=(1,"foo");a[0].', 'capitalize'
+
+    def test_completion_have_signature(self):
+        """
+        Lets make sure jedi is capable of pulling out the signature of the function we are completing.
+        """
+        ip = get_ipython()
         with provisionalcompleter():
             ip.Completer.use_jedi = True
-            completions = set(ip.Completer.completions(s, l))
+            completions = ip.Completer.completions('ope', 3)
+            c = next(completions)  # should be `open`
             ip.Completer.use_jedi = False
-            assert_in(Completion(start, end, comp), completions, reason)
-
-    def _test_not_complete(reason, s, comp):
-        l = len(s)
+        assert 'file' in c.signature, "Signature of function was not found by completer"
+        assert 'encoding' in c.signature, "Signature of function was not found by completer"
+
+
+    def test_deduplicate_completions(self):
+        """
+        Test that completions are correctly deduplicated (even if ranges are not the same)
+        """
+        ip = get_ipython()
+        ip.ex(textwrap.dedent('''
+        class Z:
+            zoo = 1
+        '''))
         with provisionalcompleter():
             ip.Completer.use_jedi = True
-            completions = set(ip.Completer.completions(s, l))
+            l = list(_deduplicate_completions('Z.z', ip.Completer.completions('Z.z', 3)))
             ip.Completer.use_jedi = False
-            assert_not_in(Completion(l, l, comp), completions, reason)
-
-    import jedi
-    jedi_version = tuple(int(i) for i in jedi.__version__.split('.')[:3])
-    if jedi_version > (0, 10):
-        yield _test_complete, 'jedi >0.9 should complete and not crash', 'a=1;a.', 'real'
-    yield _test_complete, 'can infer first argument', 'a=(1,"foo");a[0].', 'real'
-    yield _test_complete, 'can infer second argument', 'a=(1,"foo");a[1].', 'capitalize'
-    yield _test_complete, 'cover duplicate completions', 'im', 'import', 0, 2
-
-    yield _test_not_complete, 'does not mix types', 'a=(1,"foo");a[0].', 'capitalize'
-
-def test_completion_have_signature():
-    """
-    Lets make sure jedi is capable of pulling out the signature of the function we are completing.
-    """
-    ip = get_ipython()
-    with provisionalcompleter():
-        ip.Completer.use_jedi = True
-        completions = ip.Completer.completions('ope', 3)
-        c = next(completions)  # should be `open`
-        ip.Completer.use_jedi = False
-    assert 'file' in c.signature, "Signature of function was not found by completer"
-    assert 'encoding' in c.signature, "Signature of function was not found by completer"
 
+        assert len(l) == 1, 'Completions (Z.z<tab>) correctly deduplicate: %s ' % l
+        assert l[0].text == 'zoo'  # and not `it.accumulate`
 
-def test_deduplicate_completions():
-    """
-    Test that completions are correctly deduplicated (even if ranges are not the same)
-    """
-    ip = get_ipython()
-    ip.ex(textwrap.dedent('''
-    class Z:
-        zoo = 1
-    '''))
-    with provisionalcompleter():
-        ip.Completer.use_jedi = True
-        l = list(_deduplicate_completions('Z.z', ip.Completer.completions('Z.z', 3)))
-        ip.Completer.use_jedi = False
 
-    assert len(l) == 1, 'Completions (Z.z<tab>) correctly deduplicate: %s ' % l
-    assert l[0].text == 'zoo'  # and not `it.accumulate`
+    def test_greedy_completions(self):
+        """
+        Test the capability of the Greedy completer. 
 
+        Most of the test here does not really show off the greedy completer, for proof
+        each of the text below now pass with Jedi. The greedy completer is capable of more. 
 
-def test_greedy_completions():
-    """
-    Test the capability of the Greedy completer. 
+        See the :any:`test_dict_key_completion_contexts`
 
-    Most of the test here does not really show off the greedy completer, for proof
-    each of the text below now pass with Jedi. The greedy completer is capable of more. 
+        """
+        ip = get_ipython()
+        ip.ex('a=list(range(5))')
+        _,c = ip.complete('.',line='a[0].')
+        nt.assert_false('.real' in c,
+                        "Shouldn't have completed on a[0]: %s"%c)
+        def _(line, cursor_pos, expect, message, completion):
+            with greedy_completion(), provisionalcompleter():
+                ip.Completer.use_jedi = False
+                _,c = ip.complete('.', line=line, cursor_pos=cursor_pos)
+                nt.assert_in(expect, c, message % c)
 
-    See the :any:`test_dict_key_completion_contexts`
+                ip.Completer.use_jedi = True
+                with provisionalcompleter():
+                    completions = ip.Completer.completions(line, cursor_pos)
+                nt.assert_in(completion, completions)
 
-    """
-    ip = get_ipython()
-    ip.ex('a=list(range(5))')
-    _,c = ip.complete('.',line='a[0].')
-    nt.assert_false('.real' in c,
-                    "Shouldn't have completed on a[0]: %s"%c)
-    def _(line, cursor_pos, expect, message, completion):
-        with greedy_completion(), provisionalcompleter():
-            ip.Completer.use_jedi = False
-            _,c = ip.complete('.', line=line, cursor_pos=cursor_pos)
-            nt.assert_in(expect, c, message % c)
-
-            ip.Completer.use_jedi = True
-            with provisionalcompleter():
-                completions = ip.Completer.completions(line, cursor_pos)
-            nt.assert_in(completion, completions)
+        with provisionalcompleter():
+            yield _, 'a[0].', 5, 'a[0].real', "Should have completed on a[0].: %s", Completion(5,5, 'real')
+            yield _, 'a[0].r', 6, 'a[0].real', "Should have completed on a[0].r: %s", Completion(5,6, 'real')
+
+            if sys.version_info > (3, 4):
+                yield _, 'a[0].from_', 10, 'a[0].from_bytes', "Should have completed on a[0].from_: %s", Completion(5, 10, 'from_bytes')
+
+
+    def test_omit__names(self):
+        # also happens to test IPCompleter as a configurable
+        ip = get_ipython()
+        ip._hidden_attr = 1
+        ip._x = {}
+        c = ip.Completer
+        ip.ex('ip=get_ipython()')
+        cfg = Config()
+        cfg.IPCompleter.omit__names = 0
+        c.update_config(cfg)
+        with provisionalcompleter():
+            c.use_jedi = False
+            s,matches = c.complete('ip.')
+            nt.assert_in('ip.__str__', matches)
+            nt.assert_in('ip._hidden_attr', matches)
 
-    with provisionalcompleter():
-        yield _, 'a[0].', 5, 'a[0].real', "Should have completed on a[0].: %s", Completion(5,5, 'real')
-        yield _, 'a[0].r', 6, 'a[0].real', "Should have completed on a[0].r: %s", Completion(5,6, 'real')
+            # c.use_jedi = True
+            # completions = set(c.completions('ip.', 3))
+            # nt.assert_in(Completion(3, 3, '__str__'), completions)
+            # nt.assert_in(Completion(3,3, "_hidden_attr"), completions)
 
-        if sys.version_info > (3, 4):
-            yield _, 'a[0].from_', 10, 'a[0].from_bytes', "Should have completed on a[0].from_: %s", Completion(5, 10, 'from_bytes')
 
+        cfg = Config()
+        cfg.IPCompleter.omit__names = 1
+        c.update_config(cfg)
+        with provisionalcompleter():
+            c.use_jedi = False
+            s,matches = c.complete('ip.')
+            nt.assert_not_in('ip.__str__', matches)
+            # nt.assert_in('ip._hidden_attr', matches)
+
+            # c.use_jedi = True
+            # completions = set(c.completions('ip.', 3))
+            # nt.assert_not_in(Completion(3,3,'__str__'), completions)
+            # nt.assert_in(Completion(3,3, "_hidden_attr"), completions)
+
+        cfg = Config()
+        cfg.IPCompleter.omit__names = 2
+        c.update_config(cfg)
+        with provisionalcompleter():
+            c.use_jedi = False
+            s,matches = c.complete('ip.')
+            nt.assert_not_in('ip.__str__', matches)
+            nt.assert_not_in('ip._hidden_attr', matches)
 
-def test_omit__names():
-    # also happens to test IPCompleter as a configurable
-    ip = get_ipython()
-    ip._hidden_attr = 1
-    ip._x = {}
-    c = ip.Completer
-    ip.ex('ip=get_ipython()')
-    cfg = Config()
-    cfg.IPCompleter.omit__names = 0
-    c.update_config(cfg)
-    with provisionalcompleter():
-        c.use_jedi = False
-        s,matches = c.complete('ip.')
-        nt.assert_in('ip.__str__', matches)
-        nt.assert_in('ip._hidden_attr', matches)
+            # c.use_jedi = True
+            # completions = set(c.completions('ip.', 3))
+            # nt.assert_not_in(Completion(3,3,'__str__'), completions)
+            # nt.assert_not_in(Completion(3,3, "_hidden_attr"), completions)
 
-        # c.use_jedi = True
-        # completions = set(c.completions('ip.', 3))
-        # nt.assert_in(Completion(3, 3, '__str__'), completions)
-        # nt.assert_in(Completion(3,3, "_hidden_attr"), completions)
+        with provisionalcompleter():
+            c.use_jedi = False
+            s,matches = c.complete('ip._x.')
+            nt.assert_in('ip._x.keys', matches)
 
+            # c.use_jedi = True
+            # completions = set(c.completions('ip._x.', 6))
+            # nt.assert_in(Completion(6,6, "keys"), completions)
 
-    cfg = Config()
-    cfg.IPCompleter.omit__names = 1
-    c.update_config(cfg)
-    with provisionalcompleter():
-        c.use_jedi = False
-        s,matches = c.complete('ip.')
-        nt.assert_not_in('ip.__str__', matches)
-        # nt.assert_in('ip._hidden_attr', matches)
-
-        # c.use_jedi = True
-        # completions = set(c.completions('ip.', 3))
-        # nt.assert_not_in(Completion(3,3,'__str__'), completions)
-        # nt.assert_in(Completion(3,3, "_hidden_attr"), completions)
-
-    cfg = Config()
-    cfg.IPCompleter.omit__names = 2
-    c.update_config(cfg)
-    with provisionalcompleter():
-        c.use_jedi = False
-        s,matches = c.complete('ip.')
-        nt.assert_not_in('ip.__str__', matches)
-        nt.assert_not_in('ip._hidden_attr', matches)
+        del ip._hidden_attr
+        del ip._x
 
-        # c.use_jedi = True
-        # completions = set(c.completions('ip.', 3))
-        # nt.assert_not_in(Completion(3,3,'__str__'), completions)
-        # nt.assert_not_in(Completion(3,3, "_hidden_attr"), completions)
 
-    with provisionalcompleter():
+    def test_limit_to__all__False_ok(self):
+        """
+        Limit to all is deprecated, once we remove it this test can go away. 
+        """
+        ip = get_ipython()
+        c = ip.Completer
         c.use_jedi = False
-        s,matches = c.complete('ip._x.')
-        nt.assert_in('ip._x.keys', matches)
+        ip.ex('class D: x=24')
+        ip.ex('d=D()')
+        cfg = Config()
+        cfg.IPCompleter.limit_to__all__ = False
+        c.update_config(cfg)
+        s, matches = c.complete('d.')
+        nt.assert_in('d.x', matches)
 
-        # c.use_jedi = True
-        # completions = set(c.completions('ip._x.', 6))
-        # nt.assert_in(Completion(6,6, "keys"), completions)
 
-    del ip._hidden_attr
-    del ip._x
+    def test_get__all__entries_ok(self):
+        class A(object):
+            __all__ = ['x', 1]
+        words = completer.get__all__entries(A())
+        nt.assert_equal(words, ['x'])
 
 
-def test_limit_to__all__False_ok():
-    """
-    Limit to all is deprecated, once we remove it this test can go away. 
-    """
-    ip = get_ipython()
-    c = ip.Completer
-    c.use_jedi = False
-    ip.ex('class D: x=24')
-    ip.ex('d=D()')
-    cfg = Config()
-    cfg.IPCompleter.limit_to__all__ = False
-    c.update_config(cfg)
-    s, matches = c.complete('d.')
-    nt.assert_in('d.x', matches)
+    def test_get__all__entries_no__all__ok(self):
+        class A(object):
+            pass
+        words = completer.get__all__entries(A())
+        nt.assert_equal(words, [])
 
 
-def test_get__all__entries_ok():
-    class A(object):
-        __all__ = ['x', 1]
-    words = completer.get__all__entries(A())
-    nt.assert_equal(words, ['x'])
+    def test_func_kw_completions(self):
+        ip = get_ipython()
+        c = ip.Completer
+        c.use_jedi = False
+        ip.ex('def myfunc(a=1,b=2): return a+b')
+        s, matches = c.complete(None, 'myfunc(1,b')
+        nt.assert_in('b=', matches)
+        # Simulate completing with cursor right after b (pos==10):
+        s, matches = c.complete(None, 'myfunc(1,b)', 10)
+        nt.assert_in('b=', matches)
+        s, matches = c.complete(None, 'myfunc(a="escaped\\")string",b')
+        nt.assert_in('b=', matches)
+        #builtin function
+        s, matches = c.complete(None, 'min(k, k')
+        nt.assert_in('key=', matches)
+
+
+    def test_default_arguments_from_docstring(self):
+        ip = get_ipython()
+        c = ip.Completer
+        kwd = c._default_arguments_from_docstring(
+            'min(iterable[, key=func]) -> value')
+        nt.assert_equal(kwd, ['key'])
+        #with cython type etc
+        kwd = c._default_arguments_from_docstring(
+            'Minuit.migrad(self, int ncall=10000, resume=True, int nsplit=1)\n')
+        nt.assert_equal(kwd, ['ncall', 'resume', 'nsplit'])
+        #white spaces
+        kwd = c._default_arguments_from_docstring(
+            '\n Minuit.migrad(self, int ncall=10000, resume=True, int nsplit=1)\n')
+        nt.assert_equal(kwd, ['ncall', 'resume', 'nsplit'])
+
+    def test_line_magics(self):
+        ip = get_ipython()
+        c = ip.Completer
+        s, matches = c.complete(None, 'lsmag')
+        nt.assert_in('%lsmagic', matches)
+        s, matches = c.complete(None, '%lsmag')
+        nt.assert_in('%lsmagic', matches)
+
+
+    def test_cell_magics(self):
+        from IPython.core.magic import register_cell_magic
+
+        @register_cell_magic
+        def _foo_cellm(line, cell):
+            pass
+        
+        ip = get_ipython()
+        c = ip.Completer
 
+        s, matches = c.complete(None, '_foo_ce')
+        nt.assert_in('%%_foo_cellm', matches)
+        s, matches = c.complete(None, '%%_foo_ce')
+        nt.assert_in('%%_foo_cellm', matches)
 
-def test_get__all__entries_no__all__ok():
-    class A(object):
-        pass
-    words = completer.get__all__entries(A())
-    nt.assert_equal(words, [])
 
+    def test_line_cell_magics(self):
+        from IPython.core.magic import register_line_cell_magic
 
-def test_func_kw_completions():
-    ip = get_ipython()
-    c = ip.Completer
-    c.use_jedi = False
-    ip.ex('def myfunc(a=1,b=2): return a+b')
-    s, matches = c.complete(None, 'myfunc(1,b')
-    nt.assert_in('b=', matches)
-    # Simulate completing with cursor right after b (pos==10):
-    s, matches = c.complete(None, 'myfunc(1,b)', 10)
-    nt.assert_in('b=', matches)
-    s, matches = c.complete(None, 'myfunc(a="escaped\\")string",b')
-    nt.assert_in('b=', matches)
-    #builtin function
-    s, matches = c.complete(None, 'min(k, k')
-    nt.assert_in('key=', matches)
-
-
-def test_default_arguments_from_docstring():
-    ip = get_ipython()
-    c = ip.Completer
-    kwd = c._default_arguments_from_docstring(
-        'min(iterable[, key=func]) -> value')
-    nt.assert_equal(kwd, ['key'])
-    #with cython type etc
-    kwd = c._default_arguments_from_docstring(
-        'Minuit.migrad(self, int ncall=10000, resume=True, int nsplit=1)\n')
-    nt.assert_equal(kwd, ['ncall', 'resume', 'nsplit'])
-    #white spaces
-    kwd = c._default_arguments_from_docstring(
-        '\n Minuit.migrad(self, int ncall=10000, resume=True, int nsplit=1)\n')
-    nt.assert_equal(kwd, ['ncall', 'resume', 'nsplit'])
-
-def test_line_magics():
-    ip = get_ipython()
-    c = ip.Completer
-    s, matches = c.complete(None, 'lsmag')
-    nt.assert_in('%lsmagic', matches)
-    s, matches = c.complete(None, '%lsmag')
-    nt.assert_in('%lsmagic', matches)
+        @register_line_cell_magic
+        def _bar_cellm(line, cell):
+            pass
+        
+        ip = get_ipython()
+        c = ip.Completer
+
+        # The policy here is trickier, see comments in completion code.  The
+        # returned values depend on whether the user passes %% or not explicitly,
+        # and this will show a difference if the same name is both a line and cell
+        # magic.
+        s, matches = c.complete(None, '_bar_ce')
+        nt.assert_in('%_bar_cellm', matches)
+        nt.assert_in('%%_bar_cellm', matches)
+        s, matches = c.complete(None, '%_bar_ce')
+        nt.assert_in('%_bar_cellm', matches)
+        nt.assert_in('%%_bar_cellm', matches)
+        s, matches = c.complete(None, '%%_bar_ce')
+        nt.assert_not_in('%_bar_cellm', matches)
+        nt.assert_in('%%_bar_cellm', matches)
+
+
+    def test_magic_completion_order(self):
+        ip = get_ipython()
+        c = ip.Completer
+
+        # Test ordering of line and cell magics.
+        text, matches = c.complete("timeit")
+        nt.assert_equal(matches, ["%timeit", "%%timeit"])
+
+
+    def test_magic_completion_shadowing(self):
+        ip = get_ipython()
+        c = ip.Completer
+        c.use_jedi = False
 
+        # Before importing matplotlib, %matplotlib magic should be the only option.
+        text, matches = c.complete("mat")
+        nt.assert_equal(matches, ["%matplotlib"])
+
+        # The newly introduced name should shadow the magic.
+        ip.run_cell("matplotlib = 1")
+        text, matches = c.complete("mat")
+        nt.assert_equal(matches, ["matplotlib"])
+
+        # After removing matplotlib from namespace, the magic should again be
+        # the only option.
+        del ip.user_ns["matplotlib"]
+        text, matches = c.complete("mat")
+        nt.assert_equal(matches, ["%matplotlib"])
+
+    def test_magic_completion_shadowing_explicit(self):
+        """
+        If the user try to complete a shadowed magic, and explicit % start should
+        still return the completions.
+        """
+        ip = get_ipython()
+        c = ip.Completer
+
+        # Before importing matplotlib, %matplotlib magic should be the only option.
+        text, matches = c.complete("%mat")
+        nt.assert_equal(matches, ["%matplotlib"])
+
+        ip.run_cell("matplotlib = 1")
+
+        # After removing matplotlib from namespace, the magic should still be
+        # the only option.
+        text, matches = c.complete("%mat")
+        nt.assert_equal(matches, ["%matplotlib"])
+
+    def test_magic_config(self):
+        ip = get_ipython()
+        c = ip.Completer
+
+        s, matches = c.complete(None, 'conf')
+        nt.assert_in('%config', matches)
+        s, matches = c.complete(None, 'conf')
+        nt.assert_not_in('AliasManager', matches)
+        s, matches = c.complete(None, 'config ')
+        nt.assert_in('AliasManager', matches)
+        s, matches = c.complete(None, '%config ')
+        nt.assert_in('AliasManager', matches)
+        s, matches = c.complete(None, 'config Ali')
+        nt.assert_list_equal(['AliasManager'], matches)
+        s, matches = c.complete(None, '%config Ali')
+        nt.assert_list_equal(['AliasManager'], matches)
+        s, matches = c.complete(None, 'config AliasManager')
+        nt.assert_list_equal(['AliasManager'], matches)
+        s, matches = c.complete(None, '%config AliasManager')
+        nt.assert_list_equal(['AliasManager'], matches)
+        s, matches = c.complete(None, 'config AliasManager.')
+        nt.assert_in('AliasManager.default_aliases', matches)
+        s, matches = c.complete(None, '%config AliasManager.')
+        nt.assert_in('AliasManager.default_aliases', matches)
+        s, matches = c.complete(None, 'config AliasManager.de')
+        nt.assert_list_equal(['AliasManager.default_aliases'], matches)
+        s, matches = c.complete(None, 'config AliasManager.de')
+        nt.assert_list_equal(['AliasManager.default_aliases'], matches)
+
+
+    def test_magic_color(self):
+        ip = get_ipython()
+        c = ip.Completer
+
+        s, matches = c.complete(None, 'colo')
+        nt.assert_in('%colors', matches)
+        s, matches = c.complete(None, 'colo')
+        nt.assert_not_in('NoColor', matches)
+        s, matches = c.complete(None, '%colors')  # No trailing space
+        nt.assert_not_in('NoColor', matches)
+        s, matches = c.complete(None, 'colors ')
+        nt.assert_in('NoColor', matches)
+        s, matches = c.complete(None, '%colors ')
+        nt.assert_in('NoColor', matches)
+        s, matches = c.complete(None, 'colors NoCo')
+        nt.assert_list_equal(['NoColor'], matches)
+        s, matches = c.complete(None, '%colors NoCo')
+        nt.assert_list_equal(['NoColor'], matches)
+
+
+    def test_match_dict_keys(self):
+        """
+        Test that match_dict_keys works on a couple of use case does return what
+        expected, and does not crash
+        """
+        delims = ' \t\n`!@#$^&*()=+[{]}\\|;:\'",<>?'
+
+
+        keys = ['foo', b'far']
+        assert match_dict_keys(keys, "b'", delims=delims)  == ("'", 2 ,['far'])
+        assert match_dict_keys(keys, "b'f", delims=delims) == ("'", 2 ,['far'])
+        assert match_dict_keys(keys, 'b"', delims=delims)  == ('"', 2 ,['far'])
+        assert match_dict_keys(keys, 'b"f', delims=delims) == ('"', 2 ,['far'])
+
+        assert match_dict_keys(keys, "'", delims=delims)  == ("'", 1 ,['foo'])
+        assert match_dict_keys(keys, "'f", delims=delims) == ("'", 1 ,['foo'])
+        assert match_dict_keys(keys, '"', delims=delims)  == ('"', 1 ,['foo'])
+        assert match_dict_keys(keys, '"f', delims=delims) == ('"', 1 ,['foo'])
+        
+        match_dict_keys
 
-def test_cell_magics():
-    from IPython.core.magic import register_cell_magic
 
-    @register_cell_magic
-    def _foo_cellm(line, cell):
-        pass
-    
-    ip = get_ipython()
-    c = ip.Completer
+    def test_dict_key_completion_string(self):
+        """Test dictionary key completion for string keys"""
+        ip = get_ipython()
+        complete = ip.Completer.complete
 
-    s, matches = c.complete(None, '_foo_ce')
-    nt.assert_in('%%_foo_cellm', matches)
-    s, matches = c.complete(None, '%%_foo_ce')
-    nt.assert_in('%%_foo_cellm', matches)
+        ip.user_ns['d'] = {'abc': None}
 
+        # check completion at different stages
+        _, matches = complete(line_buffer="d[")
+        nt.assert_in("'abc'", matches)
+        nt.assert_not_in("'abc']", matches)
 
-def test_line_cell_magics():
-    from IPython.core.magic import register_line_cell_magic
+        _, matches = complete(line_buffer="d['")
+        nt.assert_in("abc", matches)
+        nt.assert_not_in("abc']", matches)
 
-    @register_line_cell_magic
-    def _bar_cellm(line, cell):
-        pass
-    
-    ip = get_ipython()
-    c = ip.Completer
-
-    # The policy here is trickier, see comments in completion code.  The
-    # returned values depend on whether the user passes %% or not explicitly,
-    # and this will show a difference if the same name is both a line and cell
-    # magic.
-    s, matches = c.complete(None, '_bar_ce')
-    nt.assert_in('%_bar_cellm', matches)
-    nt.assert_in('%%_bar_cellm', matches)
-    s, matches = c.complete(None, '%_bar_ce')
-    nt.assert_in('%_bar_cellm', matches)
-    nt.assert_in('%%_bar_cellm', matches)
-    s, matches = c.complete(None, '%%_bar_ce')
-    nt.assert_not_in('%_bar_cellm', matches)
-    nt.assert_in('%%_bar_cellm', matches)
-
-
-def test_magic_completion_order():
-    ip = get_ipython()
-    c = ip.Completer
+        _, matches = complete(line_buffer="d['a")
+        nt.assert_in("abc", matches)
+        nt.assert_not_in("abc']", matches)
 
-    # Test ordering of line and cell magics.
-    text, matches = c.complete("timeit")
-    nt.assert_equal(matches, ["%timeit", "%%timeit"])
+        # check use of different quoting
+        _, matches = complete(line_buffer="d[\"")
+        nt.assert_in("abc", matches)
+        nt.assert_not_in('abc\"]', matches)
 
+        _, matches = complete(line_buffer="d[\"a")
+        nt.assert_in("abc", matches)
+        nt.assert_not_in('abc\"]', matches)
 
-def test_magic_completion_shadowing():
-    ip = get_ipython()
-    c = ip.Completer
-    c.use_jedi = False
-
-    # Before importing matplotlib, %matplotlib magic should be the only option.
-    text, matches = c.complete("mat")
-    nt.assert_equal(matches, ["%matplotlib"])
-
-    # The newly introduced name should shadow the magic.
-    ip.run_cell("matplotlib = 1")
-    text, matches = c.complete("mat")
-    nt.assert_equal(matches, ["matplotlib"])
-
-    # After removing matplotlib from namespace, the magic should again be
-    # the only option.
-    del ip.user_ns["matplotlib"]
-    text, matches = c.complete("mat")
-    nt.assert_equal(matches, ["%matplotlib"])
-
-def test_magic_completion_shadowing_explicit():
-    """
-    If the user try to complete a shadowed magic, and explicit % start should
-    still return the completions.
-    """
-    ip = get_ipython()
-    c = ip.Completer
+        # check sensitivity to following context
+        _, matches = complete(line_buffer="d[]", cursor_pos=2)
+        nt.assert_in("'abc'", matches)
 
-    # Before importing matplotlib, %matplotlib magic should be the only option.
-    text, matches = c.complete("%mat")
-    nt.assert_equal(matches, ["%matplotlib"])
+        _, matches = complete(line_buffer="d['']", cursor_pos=3)
+        nt.assert_in("abc", matches)
+        nt.assert_not_in("abc'", matches)
+        nt.assert_not_in("abc']", matches)
 
-    ip.run_cell("matplotlib = 1")
+        # check multiple solutions are correctly returned and that noise is not
+        ip.user_ns['d'] = {'abc': None, 'abd': None, 'bad': None, object(): None,
+                           5: None}
 
-    # After removing matplotlib from namespace, the magic should still be
-    # the only option.
-    text, matches = c.complete("%mat")
-    nt.assert_equal(matches, ["%matplotlib"])
+        _, matches = complete(line_buffer="d['a")
+        nt.assert_in("abc", matches)
+        nt.assert_in("abd", matches)
+        nt.assert_not_in("bad", matches)
+        assert not any(m.endswith((']', '"', "'")) for m in matches), matches
+
+        # check escaping and whitespace
+        ip.user_ns['d'] = {'a\nb': None, 'a\'b': None, 'a"b': None, 'a word': None}
+        _, matches = complete(line_buffer="d['a")
+        nt.assert_in("a\\nb", matches)
+        nt.assert_in("a\\'b", matches)
+        nt.assert_in("a\"b", matches)
+        nt.assert_in("a word", matches)
+        assert not any(m.endswith((']', '"', "'")) for m in matches), matches
+
+        # - can complete on non-initial word of the string
+        _, matches = complete(line_buffer="d['a w")
+        nt.assert_in("word", matches)
+
+        # - understands quote escaping
+        _, matches = complete(line_buffer="d['a\\'")
+        nt.assert_in("b", matches)
+
+        # - default quoting should work like repr
+        _, matches = complete(line_buffer="d[")
+        nt.assert_in("\"a'b\"", matches)
+
+        # - when opening quote with ", possible to match with unescaped apostrophe
+        _, matches = complete(line_buffer="d[\"a'")
+        nt.assert_in("b", matches)
+
+        # need to not split at delims that readline won't split at
+        if '-' not in ip.Completer.splitter.delims:
+            ip.user_ns['d'] = {'before-after': None}
+            _, matches = complete(line_buffer="d['before-af")
+            nt.assert_in('before-after', matches)
+
+    def test_dict_key_completion_contexts(self):
+        """Test expression contexts in which dict key completion occurs"""
+        ip = get_ipython()
+        complete = ip.Completer.complete
+        d = {'abc': None}
+        ip.user_ns['d'] = d
+
+        class C:
+            data = d
+        ip.user_ns['C'] = C
+        ip.user_ns['get'] = lambda: d
+
+        def assert_no_completion(**kwargs):
+            _, matches = complete(**kwargs)
+            nt.assert_not_in('abc', matches)
+            nt.assert_not_in('abc\'', matches)
+            nt.assert_not_in('abc\']', matches)
+            nt.assert_not_in('\'abc\'', matches)
+            nt.assert_not_in('\'abc\']', matches)
+
+        def assert_completion(**kwargs):
+            _, matches = complete(**kwargs)
+            nt.assert_in("'abc'", matches)
+            nt.assert_not_in("'abc']", matches)
+
+        # no completion after string closed, even if reopened
+        assert_no_completion(line_buffer="d['a'")
+        assert_no_completion(line_buffer="d[\"a\"")
+        assert_no_completion(line_buffer="d['a' + ")
+        assert_no_completion(line_buffer="d['a' + '")
+
+        # completion in non-trivial expressions
+        assert_completion(line_buffer="+ d[")
+        assert_completion(line_buffer="(d[")
+        assert_completion(line_buffer="C.data[")
+
+        # greedy flag
+        def assert_completion(**kwargs):
+            _, matches = complete(**kwargs)
+            nt.assert_in("get()['abc']", matches)
+        
+        assert_no_completion(line_buffer="get()[")
+        with greedy_completion():
+            assert_completion(line_buffer="get()[")
+            assert_completion(line_buffer="get()['")
+            assert_completion(line_buffer="get()['a")
+            assert_completion(line_buffer="get()['ab")
+            assert_completion(line_buffer="get()['abc")
 
-def test_magic_config():
-    ip = get_ipython()
-    c = ip.Completer
-
-    s, matches = c.complete(None, 'conf')
-    nt.assert_in('%config', matches)
-    s, matches = c.complete(None, 'conf')
-    nt.assert_not_in('AliasManager', matches)
-    s, matches = c.complete(None, 'config ')
-    nt.assert_in('AliasManager', matches)
-    s, matches = c.complete(None, '%config ')
-    nt.assert_in('AliasManager', matches)
-    s, matches = c.complete(None, 'config Ali')
-    nt.assert_list_equal(['AliasManager'], matches)
-    s, matches = c.complete(None, '%config Ali')
-    nt.assert_list_equal(['AliasManager'], matches)
-    s, matches = c.complete(None, 'config AliasManager')
-    nt.assert_list_equal(['AliasManager'], matches)
-    s, matches = c.complete(None, '%config AliasManager')
-    nt.assert_list_equal(['AliasManager'], matches)
-    s, matches = c.complete(None, 'config AliasManager.')
-    nt.assert_in('AliasManager.default_aliases', matches)
-    s, matches = c.complete(None, '%config AliasManager.')
-    nt.assert_in('AliasManager.default_aliases', matches)
-    s, matches = c.complete(None, 'config AliasManager.de')
-    nt.assert_list_equal(['AliasManager.default_aliases'], matches)
-    s, matches = c.complete(None, 'config AliasManager.de')
-    nt.assert_list_equal(['AliasManager.default_aliases'], matches)
-
-
-def test_magic_color():
-    ip = get_ipython()
-    c = ip.Completer
-
-    s, matches = c.complete(None, 'colo')
-    nt.assert_in('%colors', matches)
-    s, matches = c.complete(None, 'colo')
-    nt.assert_not_in('NoColor', matches)
-    s, matches = c.complete(None, '%colors')  # No trailing space
-    nt.assert_not_in('NoColor', matches)
-    s, matches = c.complete(None, 'colors ')
-    nt.assert_in('NoColor', matches)
-    s, matches = c.complete(None, '%colors ')
-    nt.assert_in('NoColor', matches)
-    s, matches = c.complete(None, 'colors NoCo')
-    nt.assert_list_equal(['NoColor'], matches)
-    s, matches = c.complete(None, '%colors NoCo')
-    nt.assert_list_equal(['NoColor'], matches)
-
-
-def test_match_dict_keys():
-    """
-    Test that match_dict_keys works on a couple of use case does return what
-    expected, and does not crash
-    """
-    delims = ' \t\n`!@#$^&*()=+[{]}\\|;:\'",<>?'
-
-
-    keys = ['foo', b'far']
-    assert match_dict_keys(keys, "b'", delims=delims)  == ("'", 2 ,['far'])
-    assert match_dict_keys(keys, "b'f", delims=delims) == ("'", 2 ,['far'])
-    assert match_dict_keys(keys, 'b"', delims=delims)  == ('"', 2 ,['far'])
-    assert match_dict_keys(keys, 'b"f', delims=delims) == ('"', 2 ,['far'])
-
-    assert match_dict_keys(keys, "'", delims=delims)  == ("'", 1 ,['foo'])
-    assert match_dict_keys(keys, "'f", delims=delims) == ("'", 1 ,['foo'])
-    assert match_dict_keys(keys, '"', delims=delims)  == ('"', 1 ,['foo'])
-    assert match_dict_keys(keys, '"f', delims=delims) == ('"', 1 ,['foo'])
-    
-    match_dict_keys
-
-
-def test_dict_key_completion_string():
-    """Test dictionary key completion for string keys"""
-    ip = get_ipython()
-    complete = ip.Completer.complete
-
-    ip.user_ns['d'] = {'abc': None}
-
-    # check completion at different stages
-    _, matches = complete(line_buffer="d[")
-    nt.assert_in("'abc'", matches)
-    nt.assert_not_in("'abc']", matches)
-
-    _, matches = complete(line_buffer="d['")
-    nt.assert_in("abc", matches)
-    nt.assert_not_in("abc']", matches)
-
-    _, matches = complete(line_buffer="d['a")
-    nt.assert_in("abc", matches)
-    nt.assert_not_in("abc']", matches)
-
-    # check use of different quoting
-    _, matches = complete(line_buffer="d[\"")
-    nt.assert_in("abc", matches)
-    nt.assert_not_in('abc\"]', matches)
-
-    _, matches = complete(line_buffer="d[\"a")
-    nt.assert_in("abc", matches)
-    nt.assert_not_in('abc\"]', matches)
-
-    # check sensitivity to following context
-    _, matches = complete(line_buffer="d[]", cursor_pos=2)
-    nt.assert_in("'abc'", matches)
-
-    _, matches = complete(line_buffer="d['']", cursor_pos=3)
-    nt.assert_in("abc", matches)
-    nt.assert_not_in("abc'", matches)
-    nt.assert_not_in("abc']", matches)
-
-    # check multiple solutions are correctly returned and that noise is not
-    ip.user_ns['d'] = {'abc': None, 'abd': None, 'bad': None, object(): None,
-                       5: None}
-
-    _, matches = complete(line_buffer="d['a")
-    nt.assert_in("abc", matches)
-    nt.assert_in("abd", matches)
-    nt.assert_not_in("bad", matches)
-    assert not any(m.endswith((']', '"', "'")) for m in matches), matches
-
-    # check escaping and whitespace
-    ip.user_ns['d'] = {'a\nb': None, 'a\'b': None, 'a"b': None, 'a word': None}
-    _, matches = complete(line_buffer="d['a")
-    nt.assert_in("a\\nb", matches)
-    nt.assert_in("a\\'b", matches)
-    nt.assert_in("a\"b", matches)
-    nt.assert_in("a word", matches)
-    assert not any(m.endswith((']', '"', "'")) for m in matches), matches
-
-    # - can complete on non-initial word of the string
-    _, matches = complete(line_buffer="d['a w")
-    nt.assert_in("word", matches)
-
-    # - understands quote escaping
-    _, matches = complete(line_buffer="d['a\\'")
-    nt.assert_in("b", matches)
-
-    # - default quoting should work like repr
-    _, matches = complete(line_buffer="d[")
-    nt.assert_in("\"a'b\"", matches)
-
-    # - when opening quote with ", possible to match with unescaped apostrophe
-    _, matches = complete(line_buffer="d[\"a'")
-    nt.assert_in("b", matches)
-
-    # need to not split at delims that readline won't split at
-    if '-' not in ip.Completer.splitter.delims:
-        ip.user_ns['d'] = {'before-after': None}
-        _, matches = complete(line_buffer="d['before-af")
-        nt.assert_in('before-after', matches)
-
-def test_dict_key_completion_contexts():
-    """Test expression contexts in which dict key completion occurs"""
-    ip = get_ipython()
-    complete = ip.Completer.complete
-    d = {'abc': None}
-    ip.user_ns['d'] = d
-
-    class C:
-        data = d
-    ip.user_ns['C'] = C
-    ip.user_ns['get'] = lambda: d
-
-    def assert_no_completion(**kwargs):
-        _, matches = complete(**kwargs)
-        nt.assert_not_in('abc', matches)
-        nt.assert_not_in('abc\'', matches)
-        nt.assert_not_in('abc\']', matches)
-        nt.assert_not_in('\'abc\'', matches)
-        nt.assert_not_in('\'abc\']', matches)
-
-    def assert_completion(**kwargs):
-        _, matches = complete(**kwargs)
-        nt.assert_in("'abc'", matches)
-        nt.assert_not_in("'abc']", matches)
 
-    # no completion after string closed, even if reopened
-    assert_no_completion(line_buffer="d['a'")
-    assert_no_completion(line_buffer="d[\"a\"")
-    assert_no_completion(line_buffer="d['a' + ")
-    assert_no_completion(line_buffer="d['a' + '")
-
-    # completion in non-trivial expressions
-    assert_completion(line_buffer="+ d[")
-    assert_completion(line_buffer="(d[")
-    assert_completion(line_buffer="C.data[")
-
-    # greedy flag
-    def assert_completion(**kwargs):
-        _, matches = complete(**kwargs)
-        nt.assert_in("get()['abc']", matches)
-    
-    assert_no_completion(line_buffer="get()[")
-    with greedy_completion():
-        assert_completion(line_buffer="get()[")
-        assert_completion(line_buffer="get()['")
-        assert_completion(line_buffer="get()['a")
-        assert_completion(line_buffer="get()['ab")
-        assert_completion(line_buffer="get()['abc")
-
-
-
-def test_dict_key_completion_bytes():
-    """Test handling of bytes in dict key completion"""
-    ip = get_ipython()
-    complete = ip.Completer.complete
 
-    ip.user_ns['d'] = {'abc': None, b'abd': None}
+    def test_dict_key_completion_bytes(self):
+        """Test handling of bytes in dict key completion"""
+        ip = get_ipython()
+        complete = ip.Completer.complete
 
-    _, matches = complete(line_buffer="d[")
-    nt.assert_in("'abc'", matches)
-    nt.assert_in("b'abd'", matches)
+        ip.user_ns['d'] = {'abc': None, b'abd': None}
 
-    if False:  # not currently implemented
-        _, matches = complete(line_buffer="d[b")
+        _, matches = complete(line_buffer="d[")
+        nt.assert_in("'abc'", matches)
         nt.assert_in("b'abd'", matches)
-        nt.assert_not_in("b'abc'", matches)
 
-        _, matches = complete(line_buffer="d[b'")
-        nt.assert_in("abd", matches)
-        nt.assert_not_in("abc", matches)
+        if False:  # not currently implemented
+            _, matches = complete(line_buffer="d[b")
+            nt.assert_in("b'abd'", matches)
+            nt.assert_not_in("b'abc'", matches)
 
-        _, matches = complete(line_buffer="d[B'")
-        nt.assert_in("abd", matches)
-        nt.assert_not_in("abc", matches)
+            _, matches = complete(line_buffer="d[b'")
+            nt.assert_in("abd", matches)
+            nt.assert_not_in("abc", matches)
 
-        _, matches = complete(line_buffer="d['")
-        nt.assert_in("abc", matches)
-        nt.assert_not_in("abd", matches)
+            _, matches = complete(line_buffer="d[B'")
+            nt.assert_in("abd", matches)
+            nt.assert_not_in("abc", matches)
 
+            _, matches = complete(line_buffer="d['")
+            nt.assert_in("abc", matches)
+            nt.assert_not_in("abd", matches)
 
-def test_dict_key_completion_unicode_py3():
-    """Test handling of unicode in dict key completion"""
-    ip = get_ipython()
-    complete = ip.Completer.complete
 
-    ip.user_ns['d'] = {u'a\u05d0': None}
+    def test_dict_key_completion_unicode_py3(self):
+        """Test handling of unicode in dict key completion"""
+        ip = get_ipython()
+        complete = ip.Completer.complete
 
-    # query using escape
-    if sys.platform != 'win32':
-        # Known failure on Windows
-        _, matches = complete(line_buffer="d['a\\u05d0")
-        nt.assert_in("u05d0", matches)  # tokenized after \\
+        ip.user_ns['d'] = {u'a\u05d0': None}
 
-    # query using character
-    _, matches = complete(line_buffer="d['a\u05d0")
-    nt.assert_in(u"a\u05d0", matches)
-    
-    with greedy_completion():
         # query using escape
-        _, matches = complete(line_buffer="d['a\\u05d0")
-        nt.assert_in("d['a\\u05d0']", matches)  # tokenized after \\
+        if sys.platform != 'win32':
+            # Known failure on Windows
+            _, matches = complete(line_buffer="d['a\\u05d0")
+            nt.assert_in("u05d0", matches)  # tokenized after \\
 
         # query using character
         _, matches = complete(line_buffer="d['a\u05d0")
-        nt.assert_in(u"d['a\u05d0']", matches)
+        nt.assert_in(u"a\u05d0", matches)
         
-
-
[e-mail]_without('numpy')
-def test_struct_array_key_completion():
-    """Test dict key completion applies to numpy struct arrays"""
-    import numpy
-    ip = get_ipython()
-    complete = ip.Completer.complete
-    ip.user_ns['d'] = numpy.array([], dtype=[('hello', 'f'), ('world', 'f')])
-    _, matches = complete(line_buffer="d['")
-    nt.assert_in("hello", matches)
-    nt.assert_in("world", matches)
-    # complete on the numpy struct itself
-    dt = numpy.dtype([('my_head', [('my_dt', '>u4'), ('my_df', '>u4')]),
-                      ('my_data', '>f4', 5)])
-    x = numpy.zeros(2, dtype=dt)
-    ip.user_ns['d'] = x[1]
-    _, matches = complete(line_buffer="d['")
-    nt.assert_in("my_head", matches)
-    nt.assert_in("my_data", matches)
-    # complete on a nested level
-    with greedy_completion():
-        ip.user_ns['d'] = numpy.zeros(2, dtype=dt)
-        _, matches = complete(line_buffer="d[1]['my_head']['")
-        nt.assert_true(any(["my_dt" in m for m in matches]))
-        nt.assert_true(any(["my_df" in m for m in matches]))
-
-
[e-mail]_without('pandas')
-def test_dataframe_key_completion():
-    """Test dict key completion applies to pandas DataFrames"""
-    import pandas
-    ip = get_ipython()
-    complete = ip.Completer.complete
-    ip.user_ns['d'] = pandas.DataFrame({'hello': [1], 'world': [2]})
-    _, matches = complete(line_buffer="d['")
-    nt.assert_in("hello", matches)
-    nt.assert_in("world", matches)
-
-
-def test_dict_key_completion_invalids():
-    """Smoke test cases dict key completion can't handle"""
-    ip = get_ipython()
-    complete = ip.Completer.complete
-
-    ip.user_ns['no_getitem'] = None
-    ip.user_ns['no_keys'] = []
-    ip.user_ns['cant_call_keys'] = dict
-    ip.user_ns['empty'] = {}
-    ip.user_ns['d'] = {'abc': 5}
-
-    _, matches = complete(line_buffer="no_getitem['")
-    _, matches = complete(line_buffer="no_keys['")
-    _, matches = complete(line_buffer="cant_call_keys['")
-    _, matches = complete(line_buffer="empty['")
-    _, matches = complete(line_buffer="name_error['")
-    _, matches = complete(line_buffer="d['\\")  # incomplete escape
-
-class KeyCompletable(object):
-    def __init__(self, things=()):
-        self.things = things
-
-    def _ipython_key_completions_(self):
-        return list(self.things)
-
-def test_object_key_completion():
-    ip = get_ipython()
-    ip.user_ns['key_completable'] = KeyCompletable(['qwerty', 'qwick'])
-
-    _, matches = ip.Completer.complete(line_buffer="key_completable['qw")
-    nt.assert_in('qwerty', matches)
-    nt.assert_in('qwick', matches)
-
-
-class NamedInstanceMetaclass(type):
-    def __getitem__(cls, item):
-        return cls.get_instance(item)
-
-class NamedInstanceClass(object, metaclass=NamedInstanceMetaclass):
-    def __init__(self, name):
-        if not hasattr(self.__class__, 'instances'):
-            self.__class__.instances = {}
-        self.__class__.instances[name] = self
-
-    @classmethod
-    def _ipython_key_completions_(cls):
-        return cls.instances.keys()
-
-    @classmethod
-    def get_instance(cls, name):
-        return cls.instances[name]
-
-def test_class_key_completion():
-    ip = get_ipython()
-    NamedInstanceClass('qwerty')
-    NamedInstanceClass('qwick')
-    ip.user_ns['named_instance_class'] = NamedInstanceClass
-
-    _, matches = ip.Completer.complete(line_buffer="named_instance_class['qw")
-    nt.assert_in('qwerty', matches)
-    nt.assert_in('qwick', matches)
-
-def test_tryimport():
-    """
-    Test that try-import don't crash on trailing dot, and import modules before
-    """
-    from IPython.core.completerlib import try_import
-    assert(try_import("IPython."))
-
-
-def test_aimport_module_completer():
-    ip = get_ipython()
-    _, matches = ip.complete('i', '%aimport i')
-    nt.assert_in('io', matches)
-    nt.assert_not_in('int', matches)
-
-def test_nested_import_module_completer():
-    ip = get_ipython()
-    _, matches = ip.complete(None, 'import IPython.co', 17)
-    nt.assert_in('IPython.core', matches)
-    nt.assert_not_in('import IPython.core', matches)
-    nt.assert_not_in('IPython.display', matches)
-
-def test_import_module_completer():
-    ip = get_ipython()
-    _, matches = ip.complete('i', 'import i')
-    nt.assert_in('io', matches)
-    nt.assert_not_in('int', matches)
-
-def test_from_module_completer():
-    ip = get_ipython()
-    _, matches = ip.complete('B', 'from io import B', 16)
-    nt.assert_in('BytesIO', matches)
-    nt.assert_not_in('BaseException', matches)
-
-def test_snake_case_completion():
-    ip = get_ipython()
-    ip.Completer.use_jedi = False
-    ip.user_ns['some_three'] = 3
-    ip.user_ns['some_four'] = 4
-    _, matches = ip.complete("s_", "print(s_f")
-    nt.assert_in('some_three', matches)
-    nt.assert_in('some_four', matches)
-
-def test_mix_terms():
-    ip = get_ipython()
-    from textwrap import dedent
-    ip.Completer.use_jedi = False
-    ip.ex(dedent("""
-        class Test:
-            def meth(self, meth_arg1):
-                print("meth")
-
-            def meth_1(self, meth1_arg1, meth1_arg2):
-                print("meth1")
-
-            def meth_2(self, meth2_arg1, meth2_arg2):
-                print("meth2")
-        test = Test()
-        """))
-    _, matches = ip.complete(None, "test.meth(")
-    nt.assert_in('meth_arg1=', matches)
-    nt.assert_not_in('meth2_arg1=', matches)
+        with greedy_completion():
+            # query using escape
+            _, matches = complete(line_buffer="d['a\\u05d0")
+            nt.assert_in("d['a\\u05d0']", matches)  # tokenized after \\
+
+            # query using character
+            _, matches = complete(line_buffer="d['a\u05d0")
+            nt.assert_in(u"d['a\u05d0']", matches)
+            
+
+
+    @dec.skip_without('numpy')
+    def test_struct_array_key_completion(self):
+        """Test dict key completion applies to numpy struct arrays"""
+        import numpy
+        ip = get_ipython()
+        complete = ip.Completer.complete
+        ip.user_ns['d'] = numpy.array([], dtype=[('hello', 'f'), ('world', 'f')])
+        _, matches = complete(line_buffer="d['")
+        nt.assert_in("hello", matches)
+        nt.assert_in("world", matches)
+        # complete on the numpy struct itself
+        dt = numpy.dtype([('my_head', [('my_dt', '>u4'), ('my_df', '>u4')]),
+                          ('my_data', '>f4', 5)])
+        x = numpy.zeros(2, dtype=dt)
+        ip.user_ns['d'] = x[1]
+        _, matches = complete(line_buffer="d['")
+        nt.assert_in("my_head", matches)
+        nt.assert_in("my_data", matches)
+        # complete on a nested level
+        with greedy_completion():
+            ip.user_ns['d'] = numpy.zeros(2, dtype=dt)
+            _, matches = complete(line_buffer="d[1]['my_head']['")
+            nt.assert_true(any(["my_dt" in m for m in matches]))
+            nt.assert_true(any(["my_df" in m for m in matches]))
+
+
+    @dec.skip_without('pandas')
+    def test_dataframe_key_completion(self):
+        """Test dict key completion applies to pandas DataFrames"""
+        import pandas
+        ip = get_ipython()
+        complete = ip.Completer.complete
+        ip.user_ns['d'] = pandas.DataFrame({'hello': [1], 'world': [2]})
+        _, matches = complete(line_buffer="d['")
+        nt.assert_in("hello", matches)
+        nt.assert_in("world", matches)
+
+
+    def test_dict_key_completion_invalids(self):
+        """Smoke test cases dict key completion can't handle"""
+        ip = get_ipython()
+        complete = ip.Completer.complete
+
+        ip.user_ns['no_getitem'] = None
+        ip.user_ns['no_keys'] = []
+        ip.user_ns['cant_call_keys'] = dict
+        ip.user_ns['empty'] = {}
+        ip.user_ns['d'] = {'abc': 5}
+
+        _, matches = complete(line_buffer="no_getitem['")
+        _, matches = complete(line_buffer="no_keys['")
+        _, matches = complete(line_buffer="cant_call_keys['")
+        _, matches = complete(line_buffer="empty['")
+        _, matches = complete(line_buffer="name_error['")
+        _, matches = complete(line_buffer="d['\\")  # incomplete escape
+
+    def test_object_key_completion(self):
+        ip = get_ipython()
+        ip.user_ns['key_completable'] = KeyCompletable(['qwerty', 'qwick'])
+
+        _, matches = ip.Completer.complete(line_buffer="key_completable['qw")
+        nt.assert_in('qwerty', matches)
+        nt.assert_in('qwick', matches)
+
+
+
+    def test_class_key_completion(self):
+        ip = get_ipython()
+        NamedInstanceClass('qwerty')
+        NamedInstanceClass('qwick')
+        ip.user_ns['named_instance_class'] = NamedInstanceClass
+
+        _, matches = ip.Completer.complete(line_buffer="named_instance_class['qw")
+        nt.assert_in('qwerty', matches)
+        nt.assert_in('qwick', matches)
+
+    def test_tryimport(self):
+        """
+        Test that try-import don't crash on trailing dot, and import modules before
+        """
+        from IPython.core.completerlib import try_import
+        assert(try_import("IPython."))
+
+
+    def test_aimport_module_completer(self):
+        ip = get_ipython()
+        _, matches = ip.complete('i', '%aimport i')
+        nt.assert_in('io', matches)
+        nt.assert_not_in('int', matches)
+
+    def test_nested_import_module_completer(self):
+        ip = get_ipython()
+        _, matches = ip.complete(None, 'import IPython.co', 17)
+        nt.assert_in('IPython.core', matches)
+        nt.assert_not_in('import IPython.core', matches)
+        nt.assert_not_in('IPython.display', matches)
+
+    def test_import_module_completer(self):
+        ip = get_ipython()
+        _, matches = ip.complete('i', 'import i')
+        nt.assert_in('io', matches)
+        nt.assert_not_in('int', matches)
+
+    def test_from_module_completer(self):
+        ip = get_ipython()
+        _, matches = ip.complete('B', 'from io import B', 16)
+        nt.assert_in('BytesIO', matches)
+        nt.assert_not_in('BaseException', matches)
+
+    def test_snake_case_completion(self):
+        ip = get_ipython()
+        ip.Completer.use_jedi = False
+        ip.user_ns['some_three'] = 3
+        ip.user_ns['some_four'] = 4
+        _, matches = ip.complete("s_", "print(s_f")
+        nt.assert_in('some_three', matches)
+        nt.assert_in('some_four', matches)
+
+    def test_mix_terms(self):
+        ip = get_ipython()
+        from textwrap import dedent
+        ip.Completer.use_jedi = False
+        ip.ex(dedent("""
+            class Test:
+                def meth(self, meth_arg1):
+                    print("meth")
+
+                def meth_1(self, meth1_arg1, meth1_arg2):
+                    print("meth1")
+
+                def meth_2(self, meth2_arg1, meth2_arg2):
+                    print("meth2")
+            test = Test()
+            """))
+        _, matches = ip.complete(None, "test.meth(")
+        nt.assert_in('meth_arg1=', matches)
+        nt.assert_not_in('meth2_arg1=', matches)