Test and fix keyutils._parse_keystring

qutebrowser/keyinput/keyutils.py

@@ -151,10 +151,14 @@ def _parse_keystring(keystr):
     special = False
     for c in keystr:
         if c == '>':
-            assert special
+            if special:
                 yield _normalize_keystr(key)
                 key = ''
                 special = False
+            else:
+                yield '>'
+                for c in key:
+                    yield 'Shift+' + c if c.isupper() else c
         elif c == '<':
             special = True
         elif special:

tests/unit/keyinput/test_keyutils.py

@@ -138,6 +138,31 @@ def test_key_info_str(key, modifiers, expected):
     assert str(keyutils.KeyInfo(key, modifiers)) == expected
 
 
+@pytest.mark.parametrize('keystr, expected', [
+    ('foo', "Could not parse 'foo': error"),
+    (None, "Could not parse keystring: error"),
+])
+def test_key_parse_error(keystr, expected):
+    exc = keyutils.KeyParseError(keystr, "error")
+    assert str(exc) == expected
+
+
+@pytest.mark.parametrize('keystr, parts', [
+    ('a', ['a']),
+    ('ab', ['a', 'b']),
+    ('a<', ['a', '<']),
+    ('a>', ['a', '>']),
+    ('<a', ['<', 'a']),
+    ('>a', ['>', 'a']),
+    ('aA', ['a', 'Shift+A']),
+    ('a<Ctrl+a>b', ['a', 'ctrl+a', 'b']),
+    ('<Ctrl+a>a', ['ctrl+a', 'a']),
+    ('a<Ctrl+a>', ['a', 'ctrl+a']),
+])
+def test_parse_keystr(keystr, parts):
+    assert list(keyutils._parse_keystring(keystr)) == parts
+
+
 @pytest.mark.parametrize('keystr, expected', [
     ('<Control-x>', keyutils.KeySequence(Qt.ControlModifier | Qt.Key_X)),
     ('<Meta-x>', keyutils.KeySequence(Qt.MetaModifier | Qt.Key_X)),