[AVRO-2245] Improve java tests for compression codecs

lang/java/avro/src/test/java/org/apache/avro/file/TestAllCodecs.java

@@ -0,0 +1,96 @@
+/*
+ * 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.avro.file;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import java.util.Collection;
+
+import static org.junit.Assert.assertTrue;
+
+@RunWith(Parameterized.class)
+public class TestAllCodecs {
+
+  @Parameterized.Parameters(name = "{index}: codec={0}")
+  public static Collection<Object[]> data() {
+    return Arrays.asList(new Object[][] {
+      { "bzip2", BZip2Codec.class },
+      { "zstandard", ZstandardCodec.class },
+      { "null", NullCodec.class },
+      { "xz", XZCodec.class },
+      { "snappy", SnappyCodec.class },
+      { "deflate", DeflateCodec.class },
+    });
+  }
+
+  @Parameterized.Parameter(0)
+  public String codec;
+
+  @Parameterized.Parameter(1)
+  public Class<? extends Codec> codecClass;
+
+
+  @Test
+  public void testCodec() throws IOException {
+    int inputSize = 500_000;
+
+    byte[] input = generateTestData(inputSize);
+
+    Codec codecInstance = CodecFactory.fromString(codec).createInstance();
+    assertTrue(codecClass.isInstance(codecInstance));
+    assertTrue(codecInstance.getName().equals(codec));
+
+    ByteBuffer inputByteBuffer = ByteBuffer.wrap(input);
+    ByteBuffer compressedBuffer = codecInstance.compress(inputByteBuffer);
+
+    int compressedSize = compressedBuffer.remaining();
+
+    // Make sure something returned
+    assertTrue(compressedSize > 0);
+
+    // While the compressed size could in many real cases
+    // *increase* compared to the input size, our input data
+    // is extremely easy to compress and all Avro's compression algorithms
+    // should have a compression ratio greater than 1 (except 'null').
+    assertTrue(compressedSize < inputSize || codec.equals("null"));
+
+    // Decompress the data
+    ByteBuffer decompressedBuffer = codecInstance.decompress(compressedBuffer);
+
+    // Validate the the input and output are equal.
+    inputByteBuffer.rewind();
+    Assert.assertEquals(decompressedBuffer, inputByteBuffer);
+  }
+
+  // Generate some test data that will compress easily
+  public static byte[] generateTestData(int inputSize) {
+    byte[] arr = new byte[inputSize];
+    for (int i = 0; i < arr.length; i++) {
+      arr[i] = (byte) (65 + i % 10);
+    }
+
+    return arr;
+  }
+}