Added various variants of splice() to facilitate array manipulations by

those who are accustomed to slinging backticks and slurping files with
Perl.  Someday perhaps we'll go whole-hog and implement more of the
Perl-style splicing antics (allowing negative offset and/or length, and
optionally passing a list of items to splice into the array.)


git-svn-id: https://samskivert.googlecode.com/svn/trunk@827 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/samskivert/tests/src/java/com/samskivert/util/ArrayUtilTest.java

@@ -1,11 +1,13 @@
 //
-// $Id: ArrayUtilTest.java,v 1.1 2002/08/12 01:10:32 mdb Exp $
+// $Id: ArrayUtilTest.java,v 1.2 2002/09/06 02:12:26 shaper Exp $
 
 package com.samskivert.util;
 
 import junit.framework.Test;
 import junit.framework.TestCase;
 
+import com.samskivert.Log;
+
 /**
  * Tests the {@link ArrayUtil} class.
  */
@@ -21,73 +23,121 @@ public class ArrayUtilTest extends TestCase
         // test reversing an array
         int[] values = new int[] { 0 };
         int[] work = (int[])values.clone();
-        reverse(work);
+        ArrayUtil.reverse(work);
         Log.info("reverse: " + StringUtil.toString(work));
 
         values = new int[] { 0, 1, 2 };
         work = (int[])values.clone();
-        reverse(work);
+        ArrayUtil.reverse(work);
         Log.info("reverse: " + StringUtil.toString(work));
 
         work = (int[])values.clone();
-        reverse(work, 0, 2);
+        ArrayUtil.reverse(work, 0, 2);
         Log.info("reverse first-half: " + StringUtil.toString(work));
 
         work = (int[])values.clone();
-        reverse(work, 1, 2);
+        ArrayUtil.reverse(work, 1, 2);
         Log.info("reverse second-half: " + StringUtil.toString(work));
 
         values = new int[] { 0, 1, 2, 3, 4 };
         work = (int[])values.clone();
-        reverse(work, 1, 3);
+        ArrayUtil.reverse(work, 1, 3);
         Log.info("reverse middle: " + StringUtil.toString(work));
 
         values = new int[] { 0, 1, 2, 3 };
         work = (int[])values.clone();
-        reverse(work);
+        ArrayUtil.reverse(work);
         Log.info("reverse even: " + StringUtil.toString(work));
 
         // test shuffling two elements
         values = new int[] { 0, 1 };
         work = (int[])values.clone();
-        shuffle(work, 0, 1);
+        ArrayUtil.shuffle(work, 0, 1);
         Log.info("first-half shuffle: " + StringUtil.toString(work));
 
         work = (int[])values.clone();
-        shuffle(work, 1, 1);
+        ArrayUtil.shuffle(work, 1, 1);
         Log.info("second-half shuffle: " + StringUtil.toString(work));
 
         work = (int[])values.clone();
-        shuffle(work);
+        ArrayUtil.shuffle(work);
         Log.info("full shuffle: " + StringUtil.toString(work));
 
         // test shuffling three elements
         values = new int[] { 0, 1, 2 };
         work = (int[])values.clone();
-        shuffle(work, 0, 2);
+        ArrayUtil.shuffle(work, 0, 2);
         Log.info("first-half shuffle: " + StringUtil.toString(work));
 
         work = (int[])values.clone();
-        shuffle(work, 1, 2);
+        ArrayUtil.shuffle(work, 1, 2);
         Log.info("second-half shuffle: " + StringUtil.toString(work));
 
         work = (int[])values.clone();
-        shuffle(work);
+        ArrayUtil.shuffle(work);
         Log.info("full shuffle: " + StringUtil.toString(work));
 
         // test shuffling ten elements
         values = new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
         work = (int[])values.clone();
-        shuffle(work, 0, 5);
+        ArrayUtil.shuffle(work, 0, 5);
         Log.info("first-half shuffle: " + StringUtil.toString(work));
 
         work = (int[])values.clone();
-        shuffle(work, 5, 5);
+        ArrayUtil.shuffle(work, 5, 5);
         Log.info("second-half shuffle: " + StringUtil.toString(work));
 
         work = (int[])values.clone();
-        shuffle(work);
+        ArrayUtil.shuffle(work);
         Log.info("full shuffle: " + StringUtil.toString(work));
+
+        // test splicing with simple truncate beyond offset
+        values = new int[] { 0, 1, 2 };
+        work = (int[])values.clone();
+        work = ArrayUtil.splice(work, 0);
+        Log.info("splice truncate 0: " + StringUtil.toString(work));
+
+        work = (int[])values.clone();
+        work = ArrayUtil.splice(work, 1);
+        Log.info("splice truncate 1: " + StringUtil.toString(work));
+
+        work = (int[])values.clone();
+        work = ArrayUtil.splice(work, 2);
+        Log.info("splice truncate 2: " + StringUtil.toString(work));
+
+        values = new int[] { 0 };
+        work = (int[])values.clone();
+        work = ArrayUtil.splice(work, 0);
+        Log.info("single element splice truncate 0: " +
+                 StringUtil.toString(work));
+
+        // test splicing out a single element
+        values = new int[] { 0, 1, 2 };
+        work = (int[])values.clone();
+        work = ArrayUtil.splice(work, 0, 1);
+        Log.info("splice concat 0, 1: " + StringUtil.toString(work));
+
+        work = (int[])values.clone();
+        work = ArrayUtil.splice(work, 1, 1);
+        Log.info("splice concat 1, 1: " + StringUtil.toString(work));
+
+        work = (int[])values.clone();
+        work = ArrayUtil.splice(work, 2, 1);
+        Log.info("splice concat 2, 1: " + StringUtil.toString(work));
+
+        // test splicing out two elements
+        values = new int[] { 0, 1, 2, 3 };
+        work = (int[])values.clone();
+        work = ArrayUtil.splice(work, 0, 2);
+        Log.info("splice concat 0, 2: " + StringUtil.toString(work));
+
+        work = (int[])values.clone();
+        work = ArrayUtil.splice(work, 1, 2);
+        Log.info("splice concat 1, 2: " + StringUtil.toString(work));
+
+        work = (int[])values.clone();
+        work = ArrayUtil.splice(work, 2, 2);
+        Log.info("splice concat 2, 2: " + StringUtil.toString(work));
     }
 
     public static Test suite ()