Added commands operating on strings

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

@@ -1,5 +1,8 @@
 package redis.clients.jedis.tests.commands;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import junit.framework.Assert;
 
 import org.junit.After;
@@ -31,6 +34,158 @@ public class StringValuesCommandsTest extends Assert {
 
 	String value = jedis.get("foo");
 	assertEquals("bar", value);
+
+	assertEquals(null, jedis.get("bar"));
     }
 
-}
+    @Test
+    public void getSet() throws JedisException {
+	String value = jedis.getSet("foo", "bar");
+	assertEquals(null, value);
+	value = jedis.get("foo");
+	assertEquals("bar", value);
+    }
+
+    @Test
+    public void mget() throws JedisException {
+	List<String> values = jedis.mget("foo", "bar");
+	List<String> expected = new ArrayList<String>();
+	expected.add(null);
+	expected.add(null);
+
+	assertEquals(expected, values);
+
+	jedis.set("foo", "bar");
+
+	expected = new ArrayList<String>();
+	expected.add("bar");
+	expected.add(null);
+	values = jedis.mget("foo", "bar");
+
+	assertEquals(expected, values);
+
+	jedis.set("bar", "foo");
+
+	expected = new ArrayList<String>();
+	expected.add("bar");
+	expected.add("foo");
+	values = jedis.mget("foo", "bar");
+
+	assertEquals(expected, values);
+    }
+
+    @Test
+    public void setnx() throws JedisException {
+	int status = jedis.setnx("foo", "bar");
+	assertEquals(1, status);
+	assertEquals("bar", jedis.get("foo"));
+
+	status = jedis.setnx("foo", "bar2");
+	assertEquals(0, status);
+	assertEquals("bar", jedis.get("foo"));
+    }
+
+    @Test
+    public void setex() throws JedisException {
+	String status = jedis.setex("foo", 20, "bar");
+	assertEquals("OK", status);
+	int ttl = jedis.ttl("foo");
+	assertTrue(ttl > 0 && ttl <= 20);
+    }
+
+    @Test
+    public void mset() throws JedisException {
+	String status = jedis.mset("foo", "bar", "bar", "foo");
+	assertEquals("OK", status);
+	assertEquals("bar", jedis.get("foo"));
+	assertEquals("foo", jedis.get("bar"));
+    }
+
+    @Test
+    public void msetnx() throws JedisException {
+	int status = jedis.msetnx("foo", "bar", "bar", "foo");
+	assertEquals(1, status);
+	assertEquals("bar", jedis.get("foo"));
+	assertEquals("foo", jedis.get("bar"));
+
+	status = jedis.msetnx("foo", "bar1", "bar2", "foo2");
+	assertEquals(0, status);
+	assertEquals("bar", jedis.get("foo"));
+	assertEquals("foo", jedis.get("bar"));
+    }
+
+    @Test(expected = JedisException.class)
+    public void incrWrongValue() throws JedisException {
+	jedis.set("foo", "bar");
+	jedis.incr("foo");
+    }
+
+    @Test
+    public void incr() throws JedisException {
+	int value = jedis.incr("foo");
+	assertEquals(1, value);
+	value = jedis.incr("foo");
+	assertEquals(2, value);
+    }
+
+    @Test(expected = JedisException.class)
+    public void incrByWrongValue() throws JedisException {
+	jedis.set("foo", "bar");
+	jedis.incrBy("foo", 2);
+    }
+
+    @Test
+    public void incrBy() throws JedisException {
+	int value = jedis.incrBy("foo", 2);
+	assertEquals(2, value);
+	value = jedis.incrBy("foo", 2);
+	assertEquals(4, value);
+    }
+
+    @Test(expected = JedisException.class)
+    public void decrWrongValue() throws JedisException {
+	jedis.set("foo", "bar");
+	jedis.decr("foo");
+    }
+
+    @Test
+    public void decr() throws JedisException {
+	int value = jedis.decr("foo");
+	assertEquals(-1, value);
+	value = jedis.decr("foo");
+	assertEquals(-2, value);
+    }
+
+    @Test(expected = JedisException.class)
+    public void decrByWrongValue() throws JedisException {
+	jedis.set("foo", "bar");
+	jedis.decrBy("foo", 2);
+    }
+
+    @Test
+    public void decrBy() throws JedisException {
+	int value = jedis.decrBy("foo", 2);
+	assertEquals(-2, value);
+	value = jedis.decrBy("foo", 2);
+	assertEquals(-4, value);
+    }
+
+    @Test
+    public void append() throws JedisException {
+	int value = jedis.append("foo", "bar");
+	assertEquals(3, value);
+	assertEquals("bar", jedis.get("foo"));
+	value = jedis.append("foo", "bar");
+	assertEquals(6, value);
+	assertEquals("barbar", jedis.get("foo"));
+    }
+
+    @Test
+    public void substr() throws JedisException {
+	jedis.set("s", "This is a string");
+	assertEquals("This", jedis.substr("s", 0, 3));
+	assertEquals("ing", jedis.substr("s", -3, -1));
+	assertEquals("This is a string", jedis.substr("s", 0, -1));
+	assertEquals(" string", jedis.substr("s", 9, 100000));
+    }
+}