content: /*
   * 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
   *
   *     https://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;
  
  import org.junit.jupiter.api.Test;
  
  import java.io.ByteArrayOutputStream;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import java.io.IOException;
  import java.nio.ByteBuffer;
  
  import org.apache.avro.generic.GenericArray;
  import org.apache.avro.generic.GenericData;
  import org.apache.avro.generic.GenericDatumWriter;
  import org.apache.avro.io.BinaryData;
  import org.apache.avro.io.DatumWriter;
  import org.apache.avro.io.Encoder;
  import org.apache.avro.io.EncoderFactory;
  import org.apache.avro.util.Utf8;
  
  public class TestCompare {
  
    @Test
    void testNull() throws Exception {
      Schema schema = new Schema.Parser().parse("\"null\"");
      byte[] b = render(null, schema, new GenericDatumWriter<>());
      assertEquals(0, BinaryData.compare(b, 0, b, 0, schema));
    }
  
    @Test
    void testBoolean() throws Exception {
      check("\"boolean\"", Boolean.FALSE, Boolean.TRUE);
    }
  
    @Test
    void string() throws Exception {
      check("\"string\"", new Utf8(""), new Utf8("a"));
      check("\"string\"", new Utf8("a"), new Utf8("b"));
      check("\"string\"", new Utf8("a"), new Utf8("ab"));
      check("\"string\"", new Utf8("ab"), new Utf8("b"));
    }
  
    @Test
    void bytes() throws Exception {
      check("\"bytes\"", ByteBuffer.wrap(new byte[] {}), ByteBuffer.wrap(new byte[] { 1 }));
      check("\"bytes\"", ByteBuffer.wrap(new byte[] { 1 }), ByteBuffer.wrap(new byte[] { 2 }));
      check("\"bytes\"", ByteBuffer.wrap(new byte[] { 1, 2 }), ByteBuffer.wrap(new byte[] { 2 }));
    }
  
    @Test
    void testInt() throws Exception {
      check("\"int\"", -1, 0);
      check("\"int\"", 0, 1);
    }
  
    @Test
    void testLong() throws Exception {
      check("\"long\"", 11L, 12L);
      check("\"long\"", (long) -1, 1L);
    }
  
    @Test
    void testFloat() throws Exception {
      check("\"float\"", 1.1f, 1.2f);
      check("\"float\"", (float) -1.1, 1.0f);
    }
  
    @Test
    void testDouble() throws Exception {
      check("\"double\"", 1.2, 1.3);
      check("\"double\"", -1.2, 1.3);
    }
  
    @Test
    void array() throws Exception {
      String json = "{\"type\":\"array\", \"items\": \"long\"}";
      Schema schema = new Schema.Parser().parse(json);
      GenericArray<Long> a1 = new GenericData.Array<>(1, schema);
      a1.add(1L);
      GenericArray<Long> a2 = new GenericData.Array<>(1, schema);
      a2.add(1L);
      a2.add(0L);
      check(json, a1, a2);
    }
  
    @Test
    void record() throws Exception {
      String fields = " \"fields\":[" + "{\"name\":\"f\",\"type\":\"int\",\"order\":\"ignore\"},"
          + "{\"name\":\"g\",\"type\":\"int\",\"order\":\"descending\"}," + "{\"name\":\"h\",\"type\":\"int\"}]}";
      String recordJson = "{\"type\":\"record\", \"name\":\"Test\"," + fields;
      Schema schema = new Schema.Parser().parse(recordJson);
      GenericData.Record r1 = new GenericData.Record(schema);
      r1.put("f", 1);
      r1.put("g", 13);
      r1.put("h", 41);
      GenericData.Record r2 = new GenericData.Record(schema);
      r2.put("f", 0);
      r2.put("g", 12);
      r2.put("h", 41);
      check(recordJson, r1, r2);
      r2.put("f", 0);
      r2.put("g", 13);
      r2.put("h", 42);
      check(recordJson, r1, r2);
  
      String record2Json = "{\"type\":\"record\", \"name\":\"Test2\"," + fields;
      Schema schema2 = new Schema.Parser().parse(record2Json);
      GenericData.Record r3 = new GenericData.Record(schema2);
      r3.put("f", 1);
      r3.put("g", 13);
      r3.put("h", 41);
      assert (!r1.equals(r3)); // same fields, diff name
    }
  
    @Test
    void testEnum() throws Exception {
      String json = "{\"type\":\"enum\", \"name\":\"Test\",\"symbols\": [\"A\", \"B\"]}";
      Schema schema = new Schema.Parser().parse(json);
      check(json, new GenericData.EnumSymbol(schema, "A"), new GenericData.EnumSymbol(schema, "B"));
    }
  
    @Test
    void fixed() throws Exception {
      String json = "{\"type\": \"fixed\", \"name\":\"Test\", \"size\": 1}";
      Schema schema = new Schema.Parser().parse(json);
      check(json, new GenericData.Fixed(schema, new byte[] { (byte) 'a' }),
          new GenericData.Fixed(schema, new byte[] { (byte) 'b' }));
    }
  
    @Test
    void union() throws Exception {
      check("[\"string\", \"long\"]", new Utf8("a"), new Utf8("b"), false);
      check("[\"string\", \"long\"]", 1L, 2L, false);
      check("[\"string\", \"long\"]", new Utf8("a"), 1L, false);
    }
  
    private static <T> void check(String schemaJson, T o1, T o2) throws Exception {
      check(schemaJson, o1, o2, true);
    }
  
    private static <T> void check(String schemaJson, T o1, T o2, boolean comparable) throws Exception {
      check(new Schema.Parser().parse(schemaJson), o1, o2, comparable, new GenericDatumWriter<>(), GenericData.get());
    }
  
    private static <T> void check(Schema schema, T o1, T o2, boolean comparable, DatumWriter<T> writer,
        GenericData comparator) throws Exception {
  
      byte[] b1 = render(o1, schema, writer);
      byte[] b2 = render(o2, schema, writer);
      assertEquals(-1, BinaryData.compare(b1, 0, b2, 0, schema));
      assertEquals(1, BinaryData.compare(b2, 0, b1, 0, schema));
      assertEquals(0, BinaryData.compare(b1, 0, b1, 0, schema));
      assertEquals(0, BinaryData.compare(b2, 0, b2, 0, schema));
  
      assertEquals(-1, compare(o1, o2, schema, comparable, comparator));
      assertEquals(1, compare(o2, o1, schema, comparable, comparator));
      assertEquals(0, compare(o1, o1, schema, comparable, comparator));
      assertEquals(0, compare(o2, o2, schema, comparable, comparator));
  
      assert (o1.equals(o1));
      assert (o2.equals(o2));
      assert (!o1.equals(o2));
      assert (!o2.equals(o1));
      assert (!o1.equals(new Object()));
      assert (!o2.equals(new Object()));
      assert (!o1.equals(null));
      assert (!o2.equals(null));
  
      assert (o1.hashCode() != o2.hashCode());
  
      // check BinaryData.hashCode against Object.hashCode
      if (schema.getType() != Schema.Type.ENUM) {
        assertEquals(o1.hashCode(), BinaryData.hashCode(b1, 0, b1.length, schema));
        assertEquals(o2.hashCode(), BinaryData.hashCode(b2, 0, b2.length, schema));
      }
  
      // check BinaryData.hashCode against GenericData.hashCode
      assertEquals(comparator.hashCode(o1, schema), BinaryData.hashCode(b1, 0, b1.length, schema));
      assertEquals(comparator.hashCode(o2, schema), BinaryData.hashCode(b2, 0, b2.length, schema));
  
    }
  
    @SuppressWarnings(value = "unchecked")
    private static int compare(Object o1, Object o2, Schema schema, boolean comparable, GenericData comparator) {
      return comparable ? ((Comparable<Object>) o1).compareTo(o2) : comparator.compare(o1, o2, schema);
    }
  
    private static <T> byte[] render(T datum, Schema schema, DatumWriter<T> writer) throws IOException {
      ByteArrayOutputStream out = new ByteArrayOutputStream();
      writer.setSchema(schema);
      Encoder enc = new EncoderFactory().directBinaryEncoder(out, null);
      writer.write(datum, enc);
      enc.flush();
      return out.toByteArray();
    }
  }
  