Added more sorting options

src/test/java/redis/clients/jedis/SortingParams.java

@@ -1,20 +1,42 @@
 package redis.clients.jedis;
 
 import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 
 public class SortingParams {
-    private String pattern = null;
     private List<String> params = new ArrayList<String>();
 
     public SortingParams by(String pattern) {
-        this.pattern = pattern;
-        params.add("BY");
-        params.add(pattern);
-        return this;
+	params.add("BY");
+	params.add(pattern);
+	return this;
     }
 
-    public String[] getParams() {
-        return params.toArray(new String[params.size()]);
+    public Collection<String> getParams() {
+	return Collections.unmodifiableCollection(params);
     }
-}
+
+    public SortingParams desc() {
+	params.add("DESC");
+	return this;
+    }
+
+    public SortingParams asc() {
+	params.add("ASC");
+	return this;
+    }
+
+    public SortingParams limit(int start, int count) {
+	params.add("LIMIT");
+	params.add(String.valueOf(start));
+	params.add(String.valueOf(count));
+	return this;
+    }
+
+    public SortingParams alpha() {
+	params.add("ALPHA");
+	return this;
+    }
+}

src/test/java/redis/clients/jedis/tests/commands/SortingCommandsTest.java

@@ -20,6 +20,7 @@ public class SortingCommandsTest extends Assert {
     public void setUp() throws Exception {
 	jedis = new Jedis("localhost");
 	jedis.connect();
+	jedis.flushDB();
     }
 
     @After
@@ -45,20 +46,58 @@ public class SortingCommandsTest extends Assert {
     }
 
     @Test
-    public void sortBy() throws JedisException {
+    public void sortDesc() throws JedisException {
 	jedis.lpush("foo", "3");
 	jedis.lpush("foo", "2");
 	jedis.lpush("foo", "1");
 
 	SortingParams sp = new SortingParams();
-	sp.by("bar_*");
+	sp.desc();
 
 	List<String> result = jedis.sort("foo", sp);
 
 	List<String> expected = new ArrayList<String>();
-	expected.add("foo_1");
-	expected.add("foo_2");
-	expected.add("foo_3");
+	expected.add("3");
+	expected.add("2");
+	expected.add("1");
+
+	assertEquals(expected, result);
+    }
+
+    @Test
+    public void sortLimit() throws JedisException {
+	for (int n = 10; n > 0; n--) {
+	    jedis.lpush("foo", String.valueOf(n));
+	}
+
+	SortingParams sp = new SortingParams();
+	sp.limit(0, 3);
+
+	List<String> result = jedis.sort("foo", sp);
+
+	List<String> expected = new ArrayList<String>();
+	expected.add("1");
+	expected.add("2");
+	expected.add("3");
+
+	assertEquals(expected, result);
+    }
+
+    @Test
+    public void sortAlpha() throws JedisException {
+	jedis.lpush("foo", "1");
+	jedis.lpush("foo", "2");
+	jedis.lpush("foo", "10");
+
+	SortingParams sp = new SortingParams();
+	sp.alpha();
+
+	List<String> result = jedis.sort("foo", sp);
+
+	List<String> expected = new ArrayList<String>();
+	expected.add("1");
+	expected.add("10");
+	expected.add("2");
 
 	assertEquals(expected, result);
     }