package com.google.common.base;

import static org.junit.Assert.*;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.junit.Test;

import com.google.common.base.Joiner.MapJoiner;

public class TestJoiner {

	@Test
	public void appendToTest() {
		Joiner j = Joiner.on(',');
		List<String> l = new ArrayList<String>();
		l.add("hello");
		l.add("world");
		String result = j.join(l);
		assertEquals("hello,world", result);
	}
	
	@Test
	public void skipNullsTest() {
		Joiner j = Joiner.on(',').skipNulls();
		List<String> l = new ArrayList<String>();
		l.add("hello");
		l.add(null);
		l.add("world");
		String result = j.join(l);
		assertEquals("hello,world", result);
	}
	
	@Test
	public void useForNullTest() {
		Joiner j = Joiner.on(',').useForNull("oops");
		List<String> l = new ArrayList<String>();
		l.add("hello");
		l.add(null);
		l.add("world");
		String result = j.join(l);
		assertEquals("hello,oops,world", result);
	}
	
	@Test
	public void withKeyValueSeparatorTest() {
		MapJoiner j = Joiner.on(',').withKeyValueSeparator("->");
		Map<String, String> m = new HashMap<String, String>();
		m.put("hello", "world");
		m.put("bad", "boy");
		String result = j.join(m);
		assertEquals("hello->world,bad->boy", result);
	}
}