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test/org/apache/tomcat/util/buf/TestHexUtils.java

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+/*
+ *  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.tomcat.util.buf;
+
+import java.nio.charset.StandardCharsets;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test cases for {@link HexUtils}.
+ */
+public class TestHexUtils {
+
+    private static final String TEST01_STRING = "Hello World";
+    private static final byte[] TEST01_BYTES = TEST01_STRING.getBytes(StandardCharsets.UTF_8);
+    private static final String TEST02_STRING = "foo";
+    private static final byte[] TEST02_BYTES = TEST02_STRING.getBytes(StandardCharsets.UTF_8);
+
+    @Test
+    public void testGetDec() {
+        Assert.assertEquals(0, HexUtils.getDec('0'));
+        Assert.assertEquals(9, HexUtils.getDec('9'));
+        Assert.assertEquals(10, HexUtils.getDec('a'));
+        Assert.assertEquals(15, HexUtils.getDec('f'));
+        Assert.assertEquals(10, HexUtils.getDec('A'));
+        Assert.assertEquals(15, HexUtils.getDec('F'));
+        Assert.assertEquals(-1, HexUtils.getDec(0));
+        Assert.assertEquals(-1, HexUtils.getDec('Z'));
+        Assert.assertEquals(-1, HexUtils.getDec(255));
+        Assert.assertEquals(-1, HexUtils.getDec(-60));
+    }
+
+    @Test
+    public void testRoundTrip01() {
+        Assert.assertArrayEquals(TEST01_STRING, TEST01_BYTES,
+                HexUtils.fromHexString(HexUtils.toHexString(TEST01_BYTES)));
+    }
+
+    @Test
+    public void testRoundTrip02() {
+        Assert.assertArrayEquals(TEST02_STRING, TEST02_BYTES,
+                HexUtils.fromHexString(HexUtils.toHexString(TEST02_BYTES)));
+    }
+
+    @Test(expected=IllegalArgumentException.class)
+    public void testFromHex01() {
+        HexUtils.fromHexString("Not a hex string");
+    }
+
+    @Test(expected=IllegalArgumentException.class)
+    public void testFromHex02() {
+        // Odd number of hex characters
+        HexUtils.fromHexString("aaa");
+    }
+}