1 files changed, 84 insertions, 0 deletions
diff --git a/tests/test_javascript.py b/tests/test_javascript.py
new file mode 100644
index 0000000..05f74e2
--- /dev/null
+++ b/tests/test_javascript.py
@@ -0,0 +1,84 @@
+"""
+    Javascript tests
+    ~~~~~~~~~~~~~~~~
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import pytest
+
+from pygments.lexers.javascript import JavascriptLexer
+from pygments.token import Number
+
+
+@pytest.fixture(scope='module')
+def lexer():
+    yield JavascriptLexer()
+
+
+@pytest.mark.parametrize(
+    'text',
+    (
+        '1', '1.', '.1', '1.1', '1e1', '1E1', '1e+1', '1E-1', '1.e1', '.1e1',
+        '0888',  # octal prefix with non-octal numbers
+    )
+)
+def test_float_literal_positive_matches(lexer, text):
+    """Test literals that should be tokenized as float literals."""
+    assert list(lexer.get_tokens(text))[0] == (Number.Float, text)
+
+
+@pytest.mark.parametrize('text', ('.\u0b6a', '.', '1..', '1n', '1ee', '1e',
+                                  '1e-', '1e--1', '1e++1', '1e1.0'))
+def test_float_literals_negative_matches(lexer, text):
+    """Test text that should **not** be tokenized as float literals."""
+    assert list(lexer.get_tokens(text))[0] != (Number.Float, text)
+
+
+@pytest.mark.parametrize('text', ('0n', '123n'))
+def test_integer_literal_positive_matches(lexer, text):
+    """Test literals that should be tokenized as integer literals."""
+    assert list(lexer.get_tokens(text))[0] == (Number.Integer, text)
+
+
+@pytest.mark.parametrize('text', ('1N', '1', '1.0'))
+def test_integer_literals_negative_matches(lexer, text):
+    """Test text that should **not** be tokenized as integer literals."""
+    assert list(lexer.get_tokens(text))[0] != (Number.Integer, text)
+
+
+@pytest.mark.parametrize('text', ('0b01', '0B10n'))
+def test_binary_literal_positive_matches(lexer, text):
+    """Test literals that should be tokenized as binary literals."""
+    assert list(lexer.get_tokens(text))[0] == (Number.Bin, text)
+
+
+@pytest.mark.parametrize('text', ('0b0N', '0b', '0bb', '0b2'))
+def test_binary_literals_negative_matches(lexer, text):
+    """Test text that should **not** be tokenized as binary literals."""
+    assert list(lexer.get_tokens(text))[0] != (Number.Bin, text)
+
+
+@pytest.mark.parametrize('text', ('017', '071n', '0o11', '0O77n'))
+def test_octal_literal_positive_matches(lexer, text):
+    """Test literals that should be tokenized as octal literals."""
+    assert list(lexer.get_tokens(text))[0] == (Number.Oct, text)
+
+
+@pytest.mark.parametrize('text', ('01N', '089', '098n', '0o', '0OO', '0o88', '0O88n'))
+def test_octal_literals_negative_matches(lexer, text):
+    """Test text that should **not** be tokenized as octal literals."""
+    assert list(lexer.get_tokens(text))[0] != (Number.Oct, text)
+
+
+@pytest.mark.parametrize('text', ('0x01', '0Xefn', '0x0EF'))
+def test_hexadecimal_literal_positive_matches(lexer, text):
+    """Test literals that should be tokenized as hexadecimal literals."""
+    assert list(lexer.get_tokens(text))[0] == (Number.Hex, text)
+
+
+@pytest.mark.parametrize('text', ('0x0N', '0x', '0Xx', '0xg', '0xhn'))
+def test_hexadecimal_literals_negative_matches(lexer, text):
+    """Test text that should **not** be tokenized as hexadecimal literals."""
+    assert list(lexer.get_tokens(text))[0] != (Number.Hex, text)