// CSE 143, Winter 2011, Marty Stepp
// This JUnit test program checks the functionality of our isPalindrome method. 

import static org.junit.Assert.*;
import org.junit.*;

public class PalindromesTest {
    // Returns true if the given string reads the same forwards as backwards.
    public static boolean isPalindrome(String s) {
        if (s.length() <= 1) {
        	return true;
        } else {
        	// > 1 letter
        	s = s.toLowerCase();
        	char first = s.charAt(0);
        	char last = s.charAt(s.length() - 1);
        	if (first == last) {
        		String middle = s.substring(1, s.length() - 1);
        		return isPalindrome(middle);
        	} else {
        		return false;
        	}
        }

//    	return s.length() <= 1 || (s.charAt(0) == s.charAt(s.length() - 1)
//    		&& isPalindrome(s.substring(1, s.length() - 1)));
    }
    
	@Test
	public void test1() {
        helper("Madam", true);
	}
	
	@Test
	public void test2() {
        helper("racecar", true);
	}
	
	@Test
	public void test3() {
        helper("bob lol bob", true);
	}
	
	@Test
	public void test4() {
        helper("able was I ere I saw elba", true);
	}
	
	@Test
	public void test5() {
        helper("Java", false);
	}

	@Test
	public void test6() {
        helper("rotater", false);
	}

	@Test
	public void test7() {
        helper("byebye", false);
	}
	
	@Test
	public void test8() {
        helper("notion", false);
	}
	
	
	private void helper(String s, boolean expect) {
		assertEquals("isPalindrome(\"" + s + "\")", expect, isPalindrome(s));
	}
}