package com.michaelthomas.set.linkedhashset;

/**
 * @author Michael Thomas (www.michael-thomas.com) michael@michael-thomas.com
 * 
 */

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;

import java.util.LinkedHashSet;
import java.util.Set;

import org.junit.Before;
import org.junit.Test;

import com.michaelthomas.collection.MyCollectionTraverse;

public class MyLinkedHashSetTest {

	private MyCollectionTraverse myCollectionTraverse = new MyCollectionTraverse();
	MyLinkedHashSet myObj = new MyLinkedHashSet();
	Set<String> mySetObjPlay = new LinkedHashSet<String>();
	private Set<String> set1;
	private Set<String> set2;
	private Set<String> setNulls;

	@Before
	public void setUp() throws Exception {
		set1 = myObj.buildLinkedHashSetCarVendors1();
		set2 = myObj.buildLinkedHashSetCarVendors2();
		setNulls = myObj.buildLinkedHashSetWithNulls();
	}
	
	@Test
	public void testBuildSetCarVendors1() {
		assertEquals(3, set1.size());
		assertEquals("[BMW, Ford, Toyota]",set1.toString()); //Order: insertion order
	}
	
	@Test
	public void testBuildSetCarVendors2() {
		assertEquals(3, set2.size());
		assertEquals("[BMW, Mercedes, Chevorlet]".toString(),set2.toString()); //Order: insertion order
	}

	@Test
	public void testSetWithNulls() {
		assertEquals(3, setNulls.size());
		assertEquals("[BMW, null, ]".toString(),setNulls.toString()); //Order: insertion order
	}

	@Test
	public void testBuildNoDuplicates() {
		mySetObjPlay.add("One");
		mySetObjPlay.add("Two");
		mySetObjPlay.add("Three");
		assertEquals(3, set1.size());
		assertFalse(mySetObjPlay.add("Three")); //No duplicates allowed.
		assertEquals(3, set1.size());
		mySetObjPlay.add("Four");
		assertEquals(3, set1.size());
		
		assertEquals("[One, Two, Three, Four]",mySetObjPlay.toString()); //Order: insertion order
	}

	@Test
	public void testIterateForLoopExample() {
		String setString = myCollectionTraverse.iterateForLoopExample(set1);
		assertEquals("BMW, Ford, Toyota", setString ); //Order: insertion order
	}

}