InstantiatorTest.java

/*
 * Copyright © 2014 Cask Data, Inc.
 *
 * Licensed 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 co.cask.cdap.common.lang;

import co.cask.cdap.internal.lang.FieldVisitor;
import co.cask.cdap.internal.lang.Reflections;
import com.google.common.base.Defaults;
import com.google.common.reflect.TypeToken;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.lang.reflect.Type;

/**
 *
 */
public class InstantiatorTest {

  @Test
  public void testUnsafe() {
    Record record = new InstantiatorFactory(false).get(TypeToken.of(Record.class)).create();

    Reflections.visit(record, Record.class, new FieldVisitor() {
      @Override
      public void visit(Object instance, Type inspectType, Type declareType, Field field) throws Exception {
        if (!Modifier.isStatic(field.getModifiers())) {
          Assert.assertEquals(Defaults.defaultValue(field.getType()), field.get(instance));
        }
      }
    });
  }

  public static final class Record {
    private static final Logger LOG = LoggerFactory.getLogger(Record.class);

    private boolean bool;
    private byte b;
    private char c;
    private short s;
    private int i;
    private long l;
    private float f;
    private double d;
    private String str;

    // Just to avoid having default constructor.
    public Record(String s) {
    }
  }
}