StringCodeTest.java

// StringCodeTest
// Some test code is provided for the early HW1 problems,
// and much is left for you to add.

import junit.framework.TestCase;

public class StringCodeTest extends TestCase {
	//
	// blowup
	//
	public void testBlowup1() {
		// basic cases
		assertEquals("xxaaaabb", StringCode.blowup("xx3abb"));
		assertEquals("xxxZZZZ", StringCode.blowup("2x3Z"));
	}
	
	public void testBlowup2() {
		// things with digits
		
		// digit at end
		assertEquals("axxx", StringCode.blowup("a2x3"));
		
		// digits next to each other
		assertEquals("a33111", StringCode.blowup("a231"));
		
		// try a 0
		assertEquals("aabb", StringCode.blowup("aa0bb"));
	}
	
	public void testBlowup3() {
		// weird chars, empty string
		assertEquals("AB&&,- ab", StringCode.blowup("AB&&,- ab"));
		assertEquals("", StringCode.blowup(""));
		
		// string with only digits
		assertEquals("", StringCode.blowup("2"));
		assertEquals("33", StringCode.blowup("23"));
	}
	
	
	//
	// maxRun
	//
	public void testRun1() {
		assertEquals(2, StringCode.maxRun("hoopla"));
		assertEquals(3, StringCode.maxRun("hoopllla"));
	}
	
	public void testRun2() {
		assertEquals(3, StringCode.maxRun("abbcccddbbbxx"));
		assertEquals(0, StringCode.maxRun(""));
		assertEquals(3, StringCode.maxRun("hhhooppoo"));
	}
	
	public void testRun3() {
		// "evolve" technique -- make a series of test cases
		// where each is change from the one above.
		assertEquals(1, StringCode.maxRun("123"));
		assertEquals(2, StringCode.maxRun("1223"));
		assertEquals(2, StringCode.maxRun("112233"));
		assertEquals(3, StringCode.maxRun("1112233"));
	}

	// stringIntersect

	public void testIntersect1 () {
		assertEquals(true, StringCode.stringIntersect("Hello world", "Bye world", 6));
		assertEquals(false, StringCode.stringIntersect("blablu", "bleblo", 3));
		assertEquals(false, StringCode.stringIntersect("11111", "22", 1));
		assertEquals(true, StringCode.stringIntersect("333333333", "22223338811", 2));
	}

	public void testIntersect2 () {
		assertEquals(false, StringCode.stringIntersect("qwertyuiopasdfgh", "jklzxcvbnmmnbvcxz", 3));
		assertEquals(false, StringCode.stringIntersect("1111111111111111111111111111111", "00000000", 5));
		assertEquals(true, StringCode.stringIntersect("sameStringStringSize", "sameStringStringSize", 20));
		assertEquals(true, StringCode.stringIntersect("aaaaaaaa bs  ssssss", "bbbbbb bbnnnnnnnnnnnn", 1));
	}

	//empty strings, same strings, len greater than string size, spaces in string
	public void testIntersect3 () {
		assertEquals(false, StringCode.stringIntersect("", "", 6));
		assertEquals(false, StringCode.stringIntersect("aaaaaa", "", 5));
		assertEquals(false, StringCode.stringIntersect("", "bbbb", 1));
		assertEquals(true, StringCode.stringIntersect("a", "a", 1));
		assertEquals(false, StringCode.stringIntersect("b", "b", 2));
		assertEquals(false, StringCode.stringIntersect("c cc", "ccc", 3));
	}
}