1 files changed, 40 insertions, 0 deletions
diff --git a/tests/test_java.py b/tests/test_java.py
new file mode 100644
index 0000000..a50e862
--- /dev/null
+++ b/tests/test_java.py
@@ -0,0 +1,40 @@
+"""
+    Basic JavaLexer Test
+    ~~~~~~~~~~~~~~~~~~~~
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import time
+
+import pytest
+
+from pygments.token import String
+from pygments.lexers import JavaLexer
+
+
+@pytest.fixture(scope='module')
+def lexer():
+    yield JavaLexer()
+
+
+@pytest.mark.parametrize(
+    'text',
+    (
+        '""', '"abc"', '"ひらがな"', '"123"',
+        '"\\\\"', '"\\t"' '"\\""',
+    ),
+)
+def test_string_literals_positive_match(lexer, text):
+    """Test positive matches for string literals."""
+    tokens = list(lexer.get_tokens_unprocessed(text))
+    assert all([token is String for _, token, _ in tokens])
+    assert ''.join([value for _, _, value in tokens]) == text
+
+
+def test_string_literals_backtracking(lexer):
+    """Test catastrophic backtracking for string literals."""
+    start_time = time.time()
+    list(lexer.get_tokens_unprocessed('"' + '\\' * 100))
+    assert time.time() - start_time < 1, 'possible backtracking bug'