1 files changed, 77 insertions, 0 deletions
diff --git a/src/test/java/org/apache/commons/lang3/text/translate/NumericEntityUnescaperTest.java b/src/test/java/org/apache/commons/lang3/text/translate/NumericEntityUnescaperTest.java
new file mode 100644
index 000000000..a1c00d371
--- /dev/null
+++ b/src/test/java/org/apache/commons/lang3/text/translate/NumericEntityUnescaperTest.java
@@ -0,0 +1,77 @@
+/*
+ * 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.NumericEntityUnescaper}.
+ */
+@Deprecated
+public class NumericEntityUnescaperTest extends AbstractLangTest {
+
+    @Test
+    public void testSupplementaryUnescaping() {
+        final NumericEntityUnescaper neu = new NumericEntityUnescaper();
+        final String input = "&#68642;";
+        final String expected = "\uD803\uDC22";
+
+        final String result = neu.translate(input);
+        assertEquals(expected, result, "Failed to unescape numeric entities supplementary characters");
+    }
+
+    @Test
+    public void testOutOfBounds() {
+        final NumericEntityUnescaper neu = new NumericEntityUnescaper();
+
+        assertEquals("Test &", neu.translate("Test &"), "Failed to ignore when last character is &");
+        assertEquals("Test &#", neu.translate("Test &#"), "Failed to ignore when last character is &");
+        assertEquals("Test &#x", neu.translate("Test &#x"), "Failed to ignore when last character is &");
+        assertEquals("Test &#X", neu.translate("Test &#X"), "Failed to ignore when last character is &");
+    }
+
+    @Test
+    public void testUnfinishedEntity() {
+        // parse it
+        NumericEntityUnescaper neu = new NumericEntityUnescaper(NumericEntityUnescaper.OPTION.semiColonOptional);
+        String input = "Test &#x30 not test";
+        String expected = "Test \u0030 not test";
+
+        String result = neu.translate(input);
+        assertEquals(expected, result, "Failed to support unfinished entities (i.e. missing semicolon)");
+
+        // ignore it
+        neu = new NumericEntityUnescaper();
+        input = "Test &#x30 not test";
+        expected = input;
+
+        result = neu.translate(input);
+        assertEquals(expected, result, "Failed to ignore unfinished entities (i.e. missing semicolon)");
+
+        // fail it
+        final NumericEntityUnescaper failingNeu =
+                new NumericEntityUnescaper(NumericEntityUnescaper.OPTION.errorIfNoSemiColon);
+        final String failingInput = "Test &#x30 not test";
+        assertThrows(IllegalArgumentException.class, () -> failingNeu.translate(failingInput));
+    }
+
+}