CC - Fix issue #85. Return length of list after LPUSH/RPUSH command.

See:
http://redis.io/commands/lpush
http://redis.io/commands/rpush
#85

Author: charleswhchan

mockredis/client.py

@@ -648,7 +648,11 @@ def lpush(self, key, *args):
         # Creates the list at this key if it doesn't exist, and appends args to its beginning
         args_reversed = [self._encode(arg) for arg in args]
         args_reversed.reverse()
-        self.redis[self._encode(key)] = args_reversed + redis_list
+        updated_list = args_reversed + redis_list
+        self.redis[self._encode(key)] = updated_list
+
+        # Return the length of the list after the push operation
+        return len(updated_list)
 
     def rpop(self, key):
         """Emulate lpop."""
@@ -673,6 +677,9 @@ def rpush(self, key, *args):
         # Creates the list at this key if it doesn't exist, and appends args to it
         redis_list.extend(map(self._encode, args))
 
+        # Return the length of the list after the push operation
+        return len(redis_list)
+
     def lrem(self, key, value, count=0):
         """Emulate lrem."""
         value = self._encode(value)

mockredis/tests/test_list.py

@@ -86,15 +86,15 @@ def test_lpush(self):
         Insertion maintains order but not uniqueness.
         """
         # lpush two values
-        self.redis.lpush(LIST1, VAL1)
-        self.redis.lpush(LIST1, VAL2)
+        eq_(1, self.redis.lpush(LIST1, VAL1))
+        eq_(2, self.redis.lpush(LIST1, VAL2))
 
         # validate insertion
         eq_(b"list", self.redis.type(LIST1))
         eq_([bVAL2, bVAL1], self.redis.lrange(LIST1, 0, -1))
 
         # insert two more values with one repeated
-        self.redis.lpush(LIST1, VAL1, VAL3)
+        eq_(4, self.redis.lpush(LIST1, VAL1, VAL3))
 
         # validate the update
         eq_(b"list", self.redis.type(LIST1))
@@ -128,15 +128,15 @@ def test_rpush(self):
         Insertion maintains order but not uniqueness.
         """
         # rpush two values
-        self.redis.rpush(LIST1, VAL1)
-        self.redis.rpush(LIST1, VAL2)
+        eq_(1, self.redis.rpush(LIST1, VAL1))
+        eq_(2, self.redis.rpush(LIST1, VAL2))
 
         # validate insertion
         eq_(b"list", self.redis.type(LIST1))
         eq_([bVAL1, bVAL2], self.redis.lrange(LIST1, 0, -1))
 
         # insert two more values with one repeated
-        self.redis.rpush(LIST1, VAL1, VAL3)
+        eq_(4, self.redis.rpush(LIST1, VAL1, VAL3))
 
         # validate the update
         eq_(b"list", self.redis.type(LIST1))