How Java splits strings

gistfile1.java

package net.jobrapido.fo.api.v1.resources;

import org.junit.Test;

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

public class SplitTest {
    
    @Test
    public void aStringSplittedWithItselfIsNotNull() {
        final String[] actual = "</span>".split("</span>");
        
        assertNotNull(actual);
    }
    
    @Test
    public void aStringSplittedWithItselfReturnsAListWithNoElements() {
        final String[] actual = "</span>".split("</span>");
        
        assertEquals(0, actual.length);
    }
    
    @Test
    public void aCharacterBeforeExtractTheCharacterItself() {
        final String[] actual = "xxx</span>".split("</span>");
        
        assertEquals("xxx", actual[0]);
    }
    
    @Test
    public void aStringAfterExtractNothing() {
        final String[] actual = "</span>yyy".split("</span>");
        
        assertEquals("", actual[0]);
    }
    
    @Test
    public void bothStringsBeforeAndAfterExtractNothing() {
        final String[] actual = "xxx</span>yyy".split("</span>");
        
        assertEquals("xxx", actual[0]);
    }
}