1 files changed, 60 insertions, 0 deletions
diff --git a/src/test/java/org/apache/commons/lang3/text/translate/UnicodeUnescaperTest.java b/src/test/java/org/apache/commons/lang3/text/translate/UnicodeUnescaperTest.java
new file mode 100644
index 000000000..54d1235ce
--- /dev/null
+++ b/src/test/java/org/apache/commons/lang3/text/translate/UnicodeUnescaperTest.java
@@ -0,0 +1,60 @@
+/*
+ * 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.
+ */
+
+package org.apache.commons.lang3.text.translate;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.apache.commons.lang3.AbstractLangTest;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Unit tests for {@link org.apache.commons.lang3.text.translate.UnicodeEscaper}.
+ */
+@Deprecated
+public class UnicodeUnescaperTest extends AbstractLangTest {
+
+    // Requested in LANG-507
+    @Test
+    public void testUPlus() {
+        final UnicodeUnescaper uu = new UnicodeUnescaper();
+
+        final String input = "\\u+0047";
+        assertEquals("G", uu.translate(input), "Failed to unescape Unicode characters with 'u+' notation");
+    }
+
+    @Test
+    public void testUuuuu() {
+        final UnicodeUnescaper uu = new UnicodeUnescaper();
+
+        final String input = "\\uuuuuuuu0047";
+        final String result = uu.translate(input);
+        assertEquals("G", result, "Failed to unescape Unicode characters with many 'u' characters");
+    }
+
+    @Test
+    public void testLessThanFour() {
+        final UnicodeUnescaper uu = new UnicodeUnescaper();
+
+        final String input = "\\0047\\u006";
+        assertThrows(
+                IllegalArgumentException.class,
+                () -> uu.translate(input),
+                "A lack of digits in a Unicode escape sequence failed to throw an exception");
+    }
+}