1 files changed, 84 insertions, 0 deletions
diff --git a/src/test/java/org/apache/commons/lang3/CharEncodingTest.java b/src/test/java/org/apache/commons/lang3/CharEncodingTest.java
new file mode 100644
index 000000000..2035605c7
--- /dev/null
+++ b/src/test/java/org/apache/commons/lang3/CharEncodingTest.java
@@ -0,0 +1,84 @@
+/*
+ * 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;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.nio.charset.StandardCharsets;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * Tests CharEncoding.
+ *
+ * @see CharEncoding
+ */
+@SuppressWarnings("deprecation")
+public class CharEncodingTest extends AbstractLangTest {
+
+    private void assertSupportedEncoding(final String name) {
+        assertTrue(CharEncoding.isSupported(name), "Encoding should be supported: " + name);
+    }
+
+    /**
+     * The class can be instantiated.
+     */
+    @Test
+    public void testConstructor() {
+        new CharEncoding();
+    }
+
+    @Test
+    public void testMustBeSupportedJava1_3_1_and_above() {
+        this.assertSupportedEncoding(CharEncoding.ISO_8859_1);
+        this.assertSupportedEncoding(CharEncoding.US_ASCII);
+        this.assertSupportedEncoding(CharEncoding.UTF_16);
+        this.assertSupportedEncoding(CharEncoding.UTF_16BE);
+        this.assertSupportedEncoding(CharEncoding.UTF_16LE);
+        this.assertSupportedEncoding(CharEncoding.UTF_8);
+    }
+
+    @Test
+    public void testSupported() {
+        assertTrue(CharEncoding.isSupported("UTF8"));
+        assertTrue(CharEncoding.isSupported("UTF-8"));
+        assertTrue(CharEncoding.isSupported("ASCII"));
+    }
+
+    @Test
+    public void testNotSupported() {
+        assertFalse(CharEncoding.isSupported(null));
+        assertFalse(CharEncoding.isSupported(""));
+        assertFalse(CharEncoding.isSupported(" "));
+        assertFalse(CharEncoding.isSupported("\t\r\n"));
+        assertFalse(CharEncoding.isSupported("DOESNOTEXIST"));
+        assertFalse(CharEncoding.isSupported("this is not a valid encoding name"));
+    }
+
+    @Test
+    public void testStandardCharsetsEquality() {
+        assertEquals(StandardCharsets.ISO_8859_1.name(), CharEncoding.ISO_8859_1);
+        assertEquals(StandardCharsets.US_ASCII.name(), CharEncoding.US_ASCII);
+        assertEquals(StandardCharsets.UTF_8.name(), CharEncoding.UTF_8);
+        assertEquals(StandardCharsets.UTF_16.name(), CharEncoding.UTF_16);
+        assertEquals(StandardCharsets.UTF_16BE.name(), CharEncoding.UTF_16BE);
+        assertEquals(StandardCharsets.UTF_16LE.name(), CharEncoding.UTF_16LE);
+    }
+}