Redis PHP Mock

PHP 7.1 library providing a Redis PHP mock for your tests.

Work for now only with predis

Installation

$ composer require --dev m6web/redis-mock

Functions

It currently mocks these Redis commands :

Redis command	Description
DBSIZE	Returns the number of keys in the selected database
DEL key [key ...]	Deletes one or more keys
DECR key	Decrements the integer value of a key by one
DECRBY key decrement	Decrements the integer value of a key by decrement value
DECRBYFLOAT key decrement	Decrements the float value of a key by decrement value
EXISTS key	Determines if a key exists
EXPIRE key seconds	Sets a key's time to live in seconds
FLUSHDB	Flushes the database
GET key	Gets the value of a key
HDEL key array<fields>	Delete hash fields
HEXISTS key field	Determines if a hash field exists
HMGET key array<field>	Gets the values of multiple hash fields
HGET key field	Gets the value of a hash field
HGETALL key	Gets all the fields and values in a hash
HKEYS key	Gets all the fields in a hash
HLEN key	Gets the number of fields in a hash
HMSET key array<field, value>	Sets each value in the corresponding field
HSET key field value	Sets the string value of a hash field
HSETNX key field value	Sets field in the hash stored at key to value, only if field does not yet exist
HINCRBY key field increment	Increments the integer stored at field in the hash stored at key by increment.
INCR key	Increments the integer value of a key by one
INCRBY key increment	Increments the integer value of a key by increment value
INCRBYFLOAT key increment	Increments the float value of a key by increment value
KEYS pattern	Finds all keys matching the given pattern
LINDEX key index	Returns the element at index index in the list stored at key
LLEN key	Returns the length of the list stored at key
LPUSH key value [value ...]	Pushs values at the head of a list
LPOP key	Pops values at the head of a list
LREM key value count	Removes count instances of value from the head of a list (follows the predis parameters order)
LTRIM key start stop	Removes the values of the key list which are outside the range start...stop
LRANGE key start stop	Gets a range of elements from a list
MGET array<field>	Gets the values of multiple keys
MSET array<field, value>	Sets the string values of multiple keys
QUIT	Quit the REDIS
RPUSH key value	Pushs values at the tail of a list
RPOP key	Pops values at the tail of a list
SCAN	Iterates the set of keys in the currently selected Redis database.
SSCAN	Iterates elements of Sets types.
SET key value	Sets the string value of a key
SETEX key seconds value	Sets the value and expiration of a key
SETNX key value	Sets key to hold value if key does not exist
SADD key member [member ...]	Adds one or more members to a set
SDIFF key key [key ...]	Returns the members of the set resulting from the difference between the first set and all the successive sets.
SISMEMBER key member	Determines if a member is in a set
SMEMBERS key	Gets all the members in a set
SUNION key [key ...]	Returns the members of the set resulting from the union of all the given sets.
SINTER key [key ...]	Returns the members of the set resulting from the intersection of all the given sets.
SCARD key	Get cardinality of set (count of members)
SREM key member [member ...]	Removes one or more members from a set
TTL key	Gets the time to live for a key
TYPE key	Returns the string representation of the type of the value stored at key.
ZADD key score member	Adds one member to a sorted set, or update its score if it already exists
ZINCRBY key increment member	Increments the score of member in the sorted set stored at key by increment
ZCARD key	Returns the sorted set cardinality (number of elements) of the sorted set stored at key
ZCOUNT key min max	Returns the number of elements in the stored set at key with a score between min and max.
ZRANGE key start stop [withscores]	Returns the specified range of members in a sorted set
ZRANGEBYSCORE key min max options	Returns a range of members in a sorted set, by score
ZRANK key member	Returns the rank of member in the sorted set stored at key, with the scores ordered from low to high
ZREVRANK key member	Returns the rank of member in the sorted set stored at key, with the scores ordered from high to low
ZREM key member	Removes one membner from a sorted set
ZREMRANGEBYSCORE key min max	Removes all members in a sorted set within the given scores
ZREVRANGE key start stop [withscores]	Returns the specified range of members in a sorted set, with scores ordered from high to low
ZREVRANGEBYSCORE key min max options	Returns a range of members in a sorted set, by score, with scores ordered from high to low
ZSCORE key member	Returns the score of member in the sorted set at key
ZUNIONSTORE dest numkeys key ... [weights ...] [aggregate SUM/MIN/MAX]	Computes the union of the stored sets given by the specified keys, store the result in the destination key, and returns the number of elements of the new sorted set.

It mocks MULTI, DISCARD and EXEC commands but without any transaction behaviors, they just make the interface fluent and return each command results. PIPELINE and EXECUTE pseudo commands (client pipelining) are also mocked. EVAL, EVALSHA, WATCH and UNWATCH are just stubs—they won't execute anything

Usage

RedisMock library provides a factory able to build a mocked class of your Redis library that can be directly injected in your application :

$factory          = new \M6Web\Component\RedisMock\RedisMockFactory();
$myRedisMockClass = $factory->getAdapterClass('My\Redis\Library');
$myRedisMock      = new $myRedisMockClass($myParameters);

In a simpler way, if you don't need to instanciate the mocked class with custom parameters (e.g. to easier inject the mock using Symfony config file), you can use getAdapter instead of getAdapterClass to directly create the adapter :

$factory     = new \M6Web\Component\RedisMock\RedisMockFactory();
$myRedisMock = $factory->getAdapter('My\Redis\Library');

WARNING !

• RedisMock doesn't implement all Redis features and commands. The mock can have undesired behavior if your parent class uses unsupported features.
• Storage is static and therefore shared by all instances.

Note : the factory will throw an exception by default if your parent class implements unsupported commands. If you want even so partially use the mock, you can specify the second parameter when you build it $factory->getAdapter('My\Redis\Library', true). The exception will then thrown only when the command is called.

Static storage & Multiple servers

The storage in the RedisMock class is organized by named areas. The default area's name is the empty string '' but you can specify an alternate area name when calling the factory's getAdapter method.

getAdapter($classToExtend, $failOnlyAtRuntime = false, $ignoreConstructor = true, $storage = '')

This enables the mocking of several remote Redis servers, each one with its own storage area.

However, one same area remains statically shared across all the instances bound to it.

Tests

The development environment is provided by Vagrant and the Xotelia box.

$ cp Vagrantfile.dist Vagrantfile
$ vagrant up
$ vagrant ssh

$ cd /vagrant
$ composer install
$ ./vendor/bin/atoum

Credits

Developped by the Cytron Team of M6 Web.
Tested with atoum.

License

RedisMock is licensed under the MIT license.