1 files changed, 61 insertions, 0 deletions
diff --git a/velocity-engine-core/src/test/java/org/apache/velocity/test/UnicodeEscapeTestCase.java b/velocity-engine-core/src/test/java/org/apache/velocity/test/UnicodeEscapeTestCase.java
new file mode 100644
index 00000000..1cb45475
--- /dev/null
+++ b/velocity-engine-core/src/test/java/org/apache/velocity/test/UnicodeEscapeTestCase.java
@@ -0,0 +1,61 @@
+package org.apache.velocity.test;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import org.apache.velocity.runtime.parser.node.ASTStringLiteral;
+
+/**
+ * Test Case for <a href="https://issues.apache.org/jira/browse/VELTOOLS-520">Velocity Tools Issue 520</a>.
+ */
+public class UnicodeEscapeTestCase extends BaseTestCase
+{
+    public UnicodeEscapeTestCase(final String name) throws Exception
+    {
+        super(name);
+    }
+
+    public void testUnicodeEscape() throws Exception
+    {
+        assertEvalEquals("a", "#set($v = \"\\u0061\")$v");
+    }
+
+    private void assertUnescape(String expected, String escaped)
+    {
+        String unescaped = ASTStringLiteral.unescape(escaped);
+        assertEquals(expected, unescaped);
+        if (escaped.equals(expected))
+        {
+            // checking that no new string allocated, for perfomance
+            assertSame(unescaped, escaped);
+        }
+    }
+
+    public void testASTStringLiteralUnescape()
+    {
+        assertUnescape("", "");
+        assertUnescape("bebe", "bebe");
+        assertUnescape("as\\nsd", "as\\nsd");
+        assertUnescape("a", "\\u0061");
+        assertUnescape("abc", "\\u0061bc");
+        assertUnescape("\u0061bc\u0064", "\\u0061bc\\u0064");
+        assertUnescape("z\u0061bc\u0064f", "z\\u0061bc\\u0064f");
+    }
+
+}