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import java.util.Locale;
import java.util.function.BiConsumer;
import org.joor.Reflect;
// If you have jOOQ on the path instead of jOOR
// import org.jooq.tools.reflect.Reflect; 
import org.junit.Assert;
 
public class BeanTester implements BiConsumer<String, Object> {
 
    private final Reflect r;
 
    public BeanTester(Class<?> clazz) {
	this.r = Reflect.on(clazz).create();
    }
 
    @Override
    public void accept(String p, Object v) {
	final String property = p.substring(0, 1).toUpperCase(Locale.ENGLISH) + p.substring(1);
	final String verbSet = "set";
	final String verbGet = v instanceof Boolean ? "is" : "get";
	try {
	    Assert.assertEquals(v, r.call(verbSet + property, v).call(verbGet + property).get());
	} catch(Exception e) {
	    e.printStackTrace();
	    Assert.fail(e.getMessage());
	}
    }
}

import java.time.LocalDate;
import java.util.HashMap;
import java.util.Map;
import org.junit.Test;
 
public class BeanTesterDemo {
    static class Demo {
	private String attr1;
 
	private boolean attr2;
 
	private LocalDate attr3;
 
	public String getAttr1() {
	    return attr1;
	}
 
	public void setAttr1(String attr1) {
	    this.attr1 = attr1;
	}
 
	public boolean isAttr2() {
	    return attr2;
	}
 
	public void setAttr2(boolean attr2) {
	    this.attr2 = attr2;
	}
 
	public LocalDate getAttr3() {
	    return attr3;
	}
 
	public void setAttr3(LocalDate attr3) {
	    this.attr3 = attr3;
	}	
    }
 
    @Test
    public void beanShouldWorkAsExpected() {
	final Map<String, Object> values = new HashMap<>();
	values.put("attr1", "foobar");
	values.put("attr2", true);
	values.put("attr3", LocalDate.now());
 
	values.forEach(new BeanTester(Demo.class));
    }
}