Add test case for Angular2 lexer bug.

This test triggers a bug, in which a spurious Token.Text('') appears at
the end. This seems to stem from the ('[^<&]+', Text), rule in the HTML
lexer which matches the \n that gets automatically added during lexing.

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/test_template.py b/tests/test_template.py
new file mode 100644
index 00000000..48226f62
--- /dev/null
+++ b/tests/test_template.py
@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""Test template formats."""
+
+import textwrap
+import pytest
+
+from pygments.lexers import Angular2HtmlLexer
+from pygments.token import Token
+
+@pytest.fixture(scope='module')
+def lexer_ng2():
+    yield Angular2HtmlLexer()
+
+
+def testAngularFragment(lexer_ng2):
+    # Not starting with v makes this test work (remove the first token  from
+    # tokens in that case)
+    fragment = 'v*39j5Sq='
+    tokens = [
+        (Token.Text, 'v'),
+        (Token.Punctuation, '*'),
+        (Token.Name.Attribute, '39j5Sq'),
+        (Token.Operator, '='),
+    ]
+    assert list(lexer_ng2.get_tokens(fragment)) == tokens
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