create Unit test for StringCompression.java

add test case for StringCompression.java

Author: fx10923

src/main/java/com/ctci/arraysandstrings/StringCompressionUnitTest.java

@@ -0,0 +1,28 @@
+package com.ctci.arraysandstrings;
+
+import static org.hamcrest.CoreMatchers.nullValue;
+
+import org.junit.Before;
+import org.junit.Test;
+
+public class StringCompressionUnitTest {
+	public static String str1;
+	
+	public static String str2;
+	
+	public static String str3;
+	
+	@Before
+	public void setup() {
+		str1 = "aaabbccaaaaa";
+		str2 = "adddcc2";
+		str3 = "";
+	}
+	
+	@Test
+	public void testCompressStr() {
+		System.out.println(str1 + ": " + StringCompression.compressString(str1));
+		System.out.println(str2 + ": " + StringCompression.compressString(str2));
+		System.out.println(str3 + ": " + StringCompression.compressString(str3));
+	}
+}