package net.sf.javaml.core;

import static org.junit.Assert.*;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.junit.Test;

public class TestDenseInstance {
	@Test
	public void test(){
		DenseInstance di = new DenseInstance(new double[]{1, 2, 3});
		assertTrue(di.value(0) == 1.0);
		assertTrue(di.value(1) == 2.0);
		assertTrue(di.value(2) == 3.0);
		assertFalse(di.isEmpty());
		di.clear();
		assertFalse(di.isEmpty());  // a dense instance is never empty
		assertTrue(di.containsKey(0));
		assertFalse(di.containsKey(-1));
		assertFalse(di.containsKey(10));
		assertFalse(di.containsKey(new Object()));
		di.put(0, 2.3);
		assertTrue(di.containsValue(2.3));
		assertFalse(di.containsValue(new Object()));
		di.clear();
		assertFalse(di.entrySet().isEmpty());
		assertNotNull(di.get(0));
		assertFalse(di.keySet().isEmpty());
		
		Map<Integer, Double> m = new HashMap<Integer, Double>();
		for(int i = 0; i < 10; i++)	m.put(i, 2.3);
		
		try{
			di.putAll(m);
			fail();
		}catch(IndexOutOfBoundsException ioobe){}
		
		m.clear();
		for(int i = 0; i < 3; i++)	m.put(i, 2.3);
		di.putAll(m);
		
		try{
			di.remove(0);
			fail();
		}catch(Exception e){}
		
		assertTrue(di.size() == 3);
		assertFalse(di.values().isEmpty());
		
		assertTrue(di.noAttributes() == 3);
		
		assertNotNull(di.toString());
		
		assertEquals(di.hashCode(), di.copy().hashCode());
		assertEquals(di, di.copy());
		assertEquals(di, di.copy().copy());
		assertEquals(di.copy(), di.copy());
		assertEquals(di.copy(), di);
		assertFalse(di.equals(null));
		assertFalse(di.equals(new Object()));
		assertFalse(di.equals(new Integer(5)));
		assertEquals(new DenseInstance(new double[]{2.0, 3.0}), new DenseInstance(new double[]{2.0, 3.0}));
		assertFalse(new DenseInstance(new double[]{2.0, 3.0}).equals(new DenseInstance(new double[]{2.0})));
		
		
		Set<Integer> s = new HashSet<Integer>();
		for(int i = 0; i < 3; i++)
			s.add(i);
		
		di.removeAttributes(s);
		
		assertEquals(0, di.noAttributes());
		
		di = new DenseInstance(new double[]{}, null);
		di = new DenseInstance(5);
		
	}
}