diff options
| -rw-r--r-- | pygments/lexers/__init__.py | 3 | ||||
| -rw-r--r-- | tests/test_basic_api.py | 9 |
2 files changed, 11 insertions, 1 deletions
diff --git a/pygments/lexers/__init__.py b/pygments/lexers/__init__.py index 20b484a7..08dd4ebf 100644 --- a/pygments/lexers/__init__.py +++ b/pygments/lexers/__init__.py @@ -68,6 +68,9 @@ def get_lexer_by_name(_alias, **options): """ Get a lexer by an alias. """ + if not _alias: + raise ClassNotFound('no lexer for alias %r found' % _alias) + # lookup builtin lexers for module_name, name, aliases, _, _ in LEXERS.itervalues(): if _alias in aliases: diff --git a/tests/test_basic_api.py b/tests/test_basic_api.py index 18ed8d64..f2d24bab 100644 --- a/tests/test_basic_api.py +++ b/tests/test_basic_api.py @@ -15,7 +15,7 @@ from pygments import lexers, formatters, filters, format from pygments.token import _TokenType, Text from pygments.lexer import RegexLexer from pygments.formatters.img import FontNotFound -from pygments.util import BytesIO, StringIO, bytes, b +from pygments.util import BytesIO, StringIO, bytes, b, ClassNotFound import support @@ -131,6 +131,13 @@ def test_get_lexers(): for mimetype in mimetypes: assert cls == lexers.get_lexer_for_mimetype(mimetype).__class__.__name__ + try: + lexers.get_lexer_by_name(None) + except ClassNotFound: + pass + else: + raise Exception + def test_formatter_public_api(): ts = list(lexers.PythonLexer().get_tokens("def f(): pass")) |