Add unit tests for org.asynchttpclient.netty.util.ByteBufUtils (AsyncHttpClient#1639)

These tests were written using Diffblue Cover.

Author: EricHetti

netty-utils/src/test/java/org/asynchttpclient/netty/util/ByteBufUtilsTests.java

@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2019 AsyncHttpClient Project. All rights reserved.
+ *
+ * This program is licensed to you under the Apache License Version 2.0,
+ * and you may not use this file except in compliance with the Apache License Version 2.0.
+ * You may obtain a copy of the Apache License Version 2.0 at
+ *     http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the Apache License Version 2.0 is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
+ */
+package org.asynchttpclient.netty.util;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import java.nio.charset.Charset;
+import org.testng.annotations.Test;
+import org.testng.Assert;
+import org.testng.internal.junit.ArrayAsserts;
+
+public class ByteBufUtilsTests {
+
+    @Test
+    public void testByteBuf2BytesEmptyByteBuf() {
+        ByteBuf buf = Unpooled.buffer();
+
+        try {
+            ArrayAsserts.assertArrayEquals(new byte[]{},
+                    ByteBufUtils.byteBuf2Bytes(buf));
+        } finally {
+            buf.release();
+        }
+    }
+
+    @Test
+    public void testByteBuf2BytesNotEmptyByteBuf() {
+        ByteBuf byteBuf = Unpooled.wrappedBuffer(new byte[]{'f', 'o', 'o'});
+
+        try {
+            ArrayAsserts.assertArrayEquals(new byte[]{'f', 'o', 'o'},
+                    ByteBufUtils.byteBuf2Bytes(byteBuf));
+        } finally {
+            byteBuf.release();
+        }
+    }
+
+    @Test
+    public void testByteBuf2String() {
+        ByteBuf byteBuf = Unpooled.wrappedBuffer(new byte[]{'f', 'o', 'o'});
+        Charset charset = Charset.forName("US-ASCII");
+
+        try {
+            Assert.assertEquals(
+                    ByteBufUtils.byteBuf2String(charset, byteBuf), "foo");
+        } finally {
+            byteBuf.release();
+        }
+    }
+
+    @Test
+    public void testByteBuf2StringWithByteBufArray() {
+        ByteBuf byteBuf1 = Unpooled.wrappedBuffer(new byte[]{'f'});
+        ByteBuf byteBuf2 = Unpooled.wrappedBuffer(new byte[]{'o', 'o'});
+
+        try {
+            Assert.assertEquals(ByteBufUtils.byteBuf2String(
+                    Charset.forName("ISO-8859-1"), byteBuf1, byteBuf2), "foo");
+        } finally {
+            byteBuf1.release();
+            byteBuf2.release();
+        }
+    }
+
+    @Test
+    public void testByteBuf2Chars() {
+        ByteBuf byteBuf1 = Unpooled.wrappedBuffer(new byte[]{});
+        ByteBuf byteBuf2 = Unpooled.wrappedBuffer(new byte[]{'o'});
+
+        try {
+            ArrayAsserts.assertArrayEquals(new char[]{}, ByteBufUtils
+                    .byteBuf2Chars(Charset.forName("US-ASCII"), byteBuf1));
+            ArrayAsserts.assertArrayEquals(new char[]{}, ByteBufUtils
+                    .byteBuf2Chars(Charset.forName("ISO-8859-1"), byteBuf1));
+            ArrayAsserts.assertArrayEquals(new char[]{'o'}, ByteBufUtils
+                    .byteBuf2Chars(Charset.forName("ISO-8859-1"), byteBuf2));
+        } finally {
+            byteBuf1.release();
+            byteBuf2.release();
+        }
+    }
+
+    @Test
+    public void testByteBuf2CharsWithByteBufArray() {
+        ByteBuf byteBuf1 = Unpooled.wrappedBuffer(new byte[]{'f', 'o'});
+        ByteBuf byteBuf2 = Unpooled.wrappedBuffer(new byte[]{'%', '*'});
+
+        try {
+            ArrayAsserts.assertArrayEquals(new char[]{'f', 'o', '%', '*'},
+                    ByteBufUtils.byteBuf2Chars(Charset.forName("US-ASCII"),
+                            byteBuf1, byteBuf2));
+            ArrayAsserts.assertArrayEquals(new char[]{'f', 'o', '%', '*'},
+                    ByteBufUtils.byteBuf2Chars(Charset.forName("ISO-8859-1"),
+                            byteBuf1, byteBuf2));
+        } finally {
+            byteBuf1.release();
+            byteBuf2.release();
+        }
+    }
+
+    @Test
+    public void testByteBuf2CharsWithEmptyByteBufArray() {
+        ByteBuf byteBuf1 = Unpooled.wrappedBuffer(new byte[]{});
+        ByteBuf byteBuf2 = Unpooled.wrappedBuffer(new byte[]{'o'});
+
+        try {
+            ArrayAsserts.assertArrayEquals(new char[]{'o'}, ByteBufUtils
+                    .byteBuf2Chars(Charset.forName("ISO-8859-1"),
+                            byteBuf1, byteBuf2));
+        } finally {
+            byteBuf1.release();
+            byteBuf2.release();
+        }
+    }
+}