commit 01a13b7f2bef38181472d10393305efc74830037
Author: Mèir Noordermeer <meirnoordermeer@me.com>
Date:   Wed Feb 28 15:01:45 2018 +0100

    Initial commit cache

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..efcaef4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+.DS_Store
+.idea/
+composer.lock
+vendor/
+tmp/
+.vs/
+.vscode/
\ No newline at end of file
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..29df977
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,27 @@
+{
+  "name": "iqparts/cache",
+  "type": "library",
+  "require": {
+    "predis/predis": "^1.1"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "^6.3",
+    "phpstan/phpstan": "^0.9.1"
+  },
+  "autoload": {
+    "psr-4": {
+      "IQParts\\Cache\\": ["src"]
+    }
+  },
+  "autoload-dev": {
+    "psr-4": {
+      "IQParts\\CacheTest\\": ["test"]
+    }
+  },
+  "authors": [
+    {
+      "name": "Mèir Noordermeer",
+      "email": "meirnoordermeer@me.com"
+    }
+  ]
+}
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..a21d4e1
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+         colors="true"
+         verbose="true"
+         backupGlobals="false"
+         beStrictAboutOutputDuringTests="true"
+         beStrictAboutTestsThatDoNotTestAnything="true"
+>
+    <testsuite name="IQParts Cache tests">
+        <directory>./test/Unit</directory>
+    </testsuite>
+    <filter>
+        <whitelist addUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">./src</directory>
+        </whitelist>
+    </filter>
+</phpunit>
\ No newline at end of file
diff --git a/src/Adapter/CacheAdapterInterface.php b/src/Adapter/CacheAdapterInterface.php
new file mode 100644
index 0000000..079d923
--- /dev/null
+++ b/src/Adapter/CacheAdapterInterface.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace IQParts\Cache\Adapter;
+
+interface CacheAdapterInterface
+{
+    public const NO_TTL = -1;
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function get(string $key);
+
+    /**
+     * @param string $key
+     * @param $value
+     * @param int|null $ttl
+     * @return void
+     */
+    public function set(string $key, $value, int $ttl = null);
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function delete(string $key);
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function keys($key = '*');
+
+    /**
+     * @param $key
+     * @return int
+     */
+    public function ttl($key): int;
+}
\ No newline at end of file
diff --git a/src/Adapter/FilesystemAdapter.php b/src/Adapter/FilesystemAdapter.php
new file mode 100644
index 0000000..7371050
--- /dev/null
+++ b/src/Adapter/FilesystemAdapter.php
@@ -0,0 +1,242 @@
+<?php
+
+namespace IQParts\Cache\Adapter;
+
+use IQParts\Cache\Serializer\SerializerInterface;
+
+class FilesystemAdapter implements CacheAdapterInterface
+{
+    /**
+     * @var string
+     */
+    private $directory;
+    /**
+     * @var null|int
+     */
+    private $chmod;
+    /**
+     * @var string
+     */
+    private $directorySeparator;
+    /**
+     * @var int|null
+     */
+    private $ttl;
+    /**
+     * @var array
+     */
+    private $timeToLive;
+    /**
+     * @var SerializerInterface
+     */
+    private $serializer;
+    /**
+     * @var array
+     */
+    private $index;
+    /**
+     * @var string
+     */
+    private $indexLocation;
+    /**
+     * @var string
+     */
+    private $ttlLocation;
+
+    /**
+     * FilesystemAdapter constructor.
+     * @param string $directory
+     * @param SerializerInterface $serializer
+     * @param int|null $chmod
+     * @param int|null $ttl
+     * @param string|null $directorySeperator
+     */
+    public function __construct(
+        string $directory,
+        SerializerInterface $serializer,
+        int $chmod = null,
+        int $ttl = null,
+        string $directorySeperator = null
+    )
+    {
+        $this->indexLocation = $directory . '/' . md5($directory) . 'index';
+        $this->ttlLocation = $directory . '/' . md5($directory) . 'ttl';
+        $this->directory = $directory;
+        $this->serializer = $serializer;
+        $this->directorySeparator = $directorySeperator;
+        $this->chmod = $chmod;
+        $this->ttl = $ttl;
+
+        if (file_exists($this->indexLocation)) {
+            $this->index = json_decode(file_get_contents($this->indexLocation), true);
+        } else {
+            $this->index = [];
+        }
+
+        if (file_exists($this->ttlLocation)) {
+            $this->timeToLive = json_decode(file_get_contents($this->ttlLocation), true);
+        } else {
+            $this->timeToLive = [];
+        }
+    }
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function get(string $key)
+    {
+        $file = $this->getFilename($key);
+        if ($this->exists($file)) {
+            if (isset($this->timeToLive[$key])) {
+                if ($this->ttl($key) > 0) {
+                    return $this->serializer->deserialize(file_get_contents($file));
+                }
+            } else {
+                return $this->serializer->deserialize(file_get_contents($file));
+            }
+
+        }
+        return null;
+    }
+
+    /**
+     * @param string $key
+     * @param $value
+     * @param int|null $ttl
+     * @return void
+     */
+    public function set(string $key, $value, int $ttl = null)
+    {
+        $file = $this->getFilename($key);
+        file_put_contents($file, $this->serializer->serialize($value));
+        if ($this->chmod !== null) {
+            chmod($file, $this->chmod);
+        }
+        if ($ttl !== null) {
+            $this->timeToLive[$key] = $ttl;
+        } else if ($this->ttl !== null) {
+            $this->timeToLive[$key] = $this->ttl;
+        }
+
+        $this->index[$key] = $file;
+        $this->saveIndex();
+    }
+
+    /**
+     * @param string $key
+     */
+    public function delete(string $key)
+    {
+        if (strpos($key, '*') !== false) {
+            $this->deleteGlob($key);
+            $this->saveIndex();
+        } else {
+            $file = $this->getFilename($key);
+            if ($this->exists($file)) {
+                unlink($file);
+            }
+            unset($this->index[$key]);
+            unset($this->timeToLive[$key]);
+            $this->saveIndex();
+        }
+    }
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function keys($key = '*')
+    {
+        $matches = [];
+        foreach ($this->index as $name => $index) {
+            if (fnmatch($key, $name)) {
+                $matches[] = $name;
+            }
+        }
+        return $matches;
+    }
+
+    /**
+     * @param $key
+     * @return int
+     */
+    public function ttl($key): int
+    {
+        $file = $this->getFilename($key);
+
+        if (isset($this->timeToLive[$key])) {
+            return max(filemtime($file) + $this->timeToLive[$key] - time(), 0);
+        }
+
+        return self::NO_TTL;
+    }
+
+    /**
+     * @param $pattern
+     */
+    private function deleteGlob($pattern)
+    {
+        foreach ($this->index as $key => $value) {
+            if (fnmatch($pattern, $key)) {
+                $this->delete($key);
+            }
+        }
+    }
+
+    /**
+     * @param $file
+     * @return bool
+     */
+    private function exists(string $file)
+    {
+        return file_exists($file);
+    }
+
+    /**
+     * @param $key
+     * @return string
+     */
+    private function getFilename(string $key)
+    {
+        list($directory, $file) = $this->getDirectoryAndFile($key);
+        return $directory . '/' . md5($file);
+    }
+
+    /**
+     * @param string $key
+     * @return array
+     */
+    private function getDirectoryAndFile(string $key)
+    {
+        $directory = $this->directory;
+        if ($this->directorySeparator !== null) {
+            while (($position = strpos($key, $this->directorySeparator)) !== false) {
+                $dirName = md5(substr($key, 0, $position));
+                $directory = $directory . '/' . $dirName;
+                $this->createSubDirectoryIfNotExists($directory);
+                $key = substr($key, $position + 1);
+            }
+        }
+        return [$directory, $key];
+    }
+
+    /**
+     * @param $directory
+     */
+    private function createSubDirectoryIfNotExists($directory)
+    {
+        if (file_exists($directory) === false) {
+            mkdir($directory);
+            if ($this->chmod !== null) {
+                chmod($directory, $this->chmod);
+            }
+        }
+    }
+
+    private function saveIndex()
+    {
+        file_put_contents($this->indexLocation, json_encode($this->index));
+        file_put_contents($this->ttlLocation, json_encode($this->timeToLive));
+    }
+}
\ No newline at end of file
diff --git a/src/Adapter/MemoryAdapter.php b/src/Adapter/MemoryAdapter.php
new file mode 100644
index 0000000..490a2a8
--- /dev/null
+++ b/src/Adapter/MemoryAdapter.php
@@ -0,0 +1,91 @@
+<?php
+declare(strict_types=1);
+
+namespace IQParts\Cache\Adapter;
+
+final class MemoryAdapter implements CacheAdapterInterface
+{
+    /**
+     * @var array
+     */
+    private $data = [];
+    /**
+     * @var array
+     */
+    private $timeToLive = [];
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function get(string $key)
+    {
+        if (!isset($this->data[$key])) {
+            return null;
+        }
+
+        if (!isset($this->timeToLive[$key])) {
+            return $this->data[$key];
+        }
+
+        if ($this->ttl($key) > 0) {
+            return $this->data[$key];
+        }
+
+        unset($this->timeToLive[$key]);
+        unset($this->data[$key]);
+        return null;
+    }
+
+    /**
+     * @param string $key
+     * @param $value
+     * @param int|null $ttl
+     * @return void
+     */
+    public function set(string $key, $value, int $ttl = null)
+    {
+        $this->data[$key] = $value;
+        if ($ttl !== null) {
+            $this->timeToLive[$key] = time() + $ttl;
+        }
+    }
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function delete(string $key)
+    {
+        unset($this->data[$key]);
+        unset($this->timeToLive[$key]);
+        return 1;
+    }
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function keys($key = '*')
+    {
+        $matches = [];
+        foreach ($this->data as $name => $value) {
+            if (fnmatch($key, $name)) {
+                $matches[] = $name;
+            }
+        }
+        return $matches;
+    }
+
+    /**
+     * @param $key
+     * @return int
+     */
+    public function ttl($key): int
+    {
+        if (isset($this->timeToLive[$key])) {
+            return max($this->timeToLive[$key] - time(), 0);
+        }
+        return self::NO_TTL;
+    }
+}
\ No newline at end of file
diff --git a/src/Adapter/NamespaceAdapter.php b/src/Adapter/NamespaceAdapter.php
new file mode 100644
index 0000000..2f00af7
--- /dev/null
+++ b/src/Adapter/NamespaceAdapter.php
@@ -0,0 +1,87 @@
+<?php
+
+namespace IQParts\Cache\Adapter;
+
+final class NamespaceAdapter implements CacheAdapterInterface
+{
+    /**
+     * @var string
+     */
+    private $namespace;
+    /**
+     * @var CacheAdapterInterface
+     */
+    private $cacheAdapter;
+
+    /**
+     * NamespaceAdapter constructor.
+     * @param string $namespace
+     * @param CacheAdapterInterface $cacheAdapter
+     */
+    public function __construct(string $namespace, CacheAdapterInterface $cacheAdapter)
+    {
+        $this->namespace = $namespace . ':';
+        $this->cacheAdapter = $cacheAdapter;
+    }
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function get(string $key)
+    {
+        return $this->cacheAdapter->get($this->namespace . $key);
+    }
+
+    /**
+     * @param string $key
+     * @param $value
+     * @param int|null $ttl
+     * @return void
+     */
+    public function set(string $key, $value, int $ttl = null): void
+    {
+        $this->cacheAdapter->set($this->namespace . $key, $value, $ttl);
+    }
+
+    /**
+     * @param string $key
+     * @return void
+     */
+    public function delete(string $key)
+    {
+        $this->cacheAdapter->delete($this->namespace . $key);
+    }
+
+    /**
+     * @param string $key
+     * @return array
+     */
+    public function keys($key = '*')
+    {
+        if (substr($key, -1) !== '*') {
+            $key = $key . '*';
+        }
+
+        $keys = $this->cacheAdapter->keys($this->namespace . $key);
+        $allowed = [];
+        $len = strlen($this->namespace);
+
+        foreach ($keys as $key) {
+            if (substr($key, 0, $len) === $this->namespace) {
+                $allowed[] = substr($key, $len);
+            }
+        }
+
+        return $allowed;
+    }
+
+    /**
+     * @param $key
+     * @return int
+     */
+    public function ttl($key): int
+    {
+        return $this->cacheAdapter->ttl($this->namespace . $key);
+    }
+}
\ No newline at end of file
diff --git a/src/Adapter/NullAdapter.php b/src/Adapter/NullAdapter.php
new file mode 100644
index 0000000..fdc7503
--- /dev/null
+++ b/src/Adapter/NullAdapter.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace IQParts\Cache\Adapter;
+
+final class NullAdapter implements CacheAdapterInterface
+{
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function get(string $key)
+    {
+        return null;
+    }
+
+    /**
+     * @param string $key
+     * @param $value
+     * @param int|null $ttl
+     * @return void
+     */
+    public function set(string $key, $value, int $ttl = null)
+    {
+    }
+
+    /**
+     * @param string $key
+     * @return void
+     */
+    public function delete(string $key)
+    {
+    }
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function keys($key = '')
+    {
+        return [];
+    }
+
+    /**
+     * @param $key
+     * @return int
+     */
+    public function ttl($key): int
+    {
+        return 0;
+    }
+}
\ No newline at end of file
diff --git a/src/Adapter/PredisAdapter.php b/src/Adapter/PredisAdapter.php
new file mode 100644
index 0000000..a1667cb
--- /dev/null
+++ b/src/Adapter/PredisAdapter.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace IQParts\Cache\Adapter;
+
+use IQParts\Cache\Serializer\SerializerInterface;
+use Predis\Client;
+use Predis\ClientInterface;
+
+final class PredisAdapter implements CacheAdapterInterface
+{
+    /**
+     * @var Client
+     */
+    private $client;
+    /**
+     * @var SerializerInterface
+     */
+    private $serializer;
+    /**
+     * @var null
+     */
+    private $defaultTtl;
+
+    /**
+     * PredisAdapter constructor.
+     * @param ClientInterface $client
+     * @param SerializerInterface $serializer
+     * @param int $defaultTtl
+     */
+    public function __construct(ClientInterface $client, SerializerInterface $serializer, $defaultTtl = null)
+    {
+        $this->client = $client;
+        $this->serializer = $serializer;
+        $this->defaultTtl = $defaultTtl;
+    }
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function get(string $key)
+    {
+        return $this->serializer->deserialize($this->client->get($key));
+    }
+
+    /**
+     * @param string $key
+     * @param $value
+     * @param int|null $ttl TTL in seconds
+     */
+    public function set(string $key, $value, int $ttl = null)
+    {
+        if ($ttl !== null && $ttl !== 0) {
+            $this->client->setex($key, $ttl ?? $this->defaultTtl, $this->serializer->serialize($value));
+        } else {
+            $this->client->set($key, $this->serializer->serialize($value));
+        }
+    }
+
+    /**
+     * @param string $key
+     * @return integer
+     */
+    public function delete(string $key): int
+    {
+        return $this->client->del([$key]);
+    }
+
+    /**
+     * @param string $key
+     * @return mixed
+     */
+    public function keys($key = '*')
+    {
+        return $this->client->keys($key);
+    }
+
+    /**
+     * @param $key
+     * @return int
+     */
+    public function ttl($key): int
+    {
+        return $this->client->ttl($key);
+    }
+}
\ No newline at end of file
diff --git a/src/Serializer/JsonSerializer.php b/src/Serializer/JsonSerializer.php
new file mode 100644
index 0000000..d9cc997
--- /dev/null
+++ b/src/Serializer/JsonSerializer.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace IQParts\Cache\Serializer;
+
+final class JsonSerializer implements SerializerInterface
+{
+    public function serialize($input)
+    {
+        if (is_array($input)) {
+            return json_encode($input);
+        }
+
+        return $input;
+    }
+
+    public function deserialize($string)
+    {
+        return json_decode($string, true) ?? $string;
+    }
+}
\ No newline at end of file
diff --git a/src/Serializer/NoSerializer.php b/src/Serializer/NoSerializer.php
new file mode 100644
index 0000000..0d56db6
--- /dev/null
+++ b/src/Serializer/NoSerializer.php
@@ -0,0 +1,17 @@
+<?php
+declare(strict_types=1);
+
+namespace IQParts\Cache\Serializer;
+
+final class NoSerializer implements SerializerInterface
+{
+    public function serialize($input)
+    {
+        return $input;
+    }
+
+    public function deserialize($string)
+    {
+        return $string;
+    }
+}
\ No newline at end of file
diff --git a/src/Serializer/SerializerInterface.php b/src/Serializer/SerializerInterface.php
new file mode 100644
index 0000000..3f4286f
--- /dev/null
+++ b/src/Serializer/SerializerInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace IQParts\Cache\Serializer;
+
+interface SerializerInterface
+{
+    public function serialize($input);
+
+    public function deserialize($string);
+}
\ No newline at end of file
diff --git a/test/AbstractTestCase.php b/test/AbstractTestCase.php
new file mode 100644
index 0000000..daae177
--- /dev/null
+++ b/test/AbstractTestCase.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace IQParts\CacheTest;
+
+use PHPUnit\Framework\TestCase;
+
+abstract class AbstractTestCase extends TestCase
+{
+    public function getTmpDirectory()
+    {
+        $location = __DIR__ . '/../tmp';
+        if (!file_exists($location)) {
+            if (!mkdir($location)) {
+                throw new \RuntimeException('Could not create directory: ' . $location);
+            }
+            chmod($location, 0777);
+        }
+        return $location;
+    }
+}
\ No newline at end of file
diff --git a/test/Unit/Adapter/FilesystemAdapterTest.php b/test/Unit/Adapter/FilesystemAdapterTest.php
new file mode 100644
index 0000000..f5cef8e
--- /dev/null
+++ b/test/Unit/Adapter/FilesystemAdapterTest.php
@@ -0,0 +1,121 @@
+<?php
+declare(strict_types=1);
+
+namespace IQParts\CacheTest\Unit\Adapter;
+
+use IQParts\Cache\Adapter\FilesystemAdapter;
+use IQParts\Cache\Serializer\JsonSerializer;
+use IQParts\CacheTest\AbstractTestCase;
+
+final class FilesystemAdapterTest extends AbstractTestCase
+{
+    public function testGetSet()
+    {
+        $location = $this->getTmpDirectory();
+        $adapter = new FilesystemAdapter(
+            $location,
+            new JsonSerializer(),
+            0777
+        );
+
+
+        $adapter->set('a', 'b');
+        $this->assertEquals('b', $adapter->get('a'));
+
+        $adapter->delete('a');
+        $this->assertEquals(null, $adapter->get('a'));
+
+        $adapter->set('ttl', 'b', 200);
+        $this->assertTrue($adapter->ttl('ttl') > 0);
+        $this->assertTrue($adapter->ttl('b') === $adapter::NO_TTL);
+
+        $adapter->set('a-keys', 'a');
+        $adapter->set('b-keys', 'a');
+        $this->assertEquals(['a-keys'], $adapter->keys('a*'));
+        $adapter->delete('b');
+        $adapter->delete('a-keys');
+        $adapter->delete('b-keys');
+    }
+
+    public function testTtl()
+    {
+        $location = $this->getTmpDirectory();
+        $adapter = new FilesystemAdapter(
+            $location,
+            new JsonSerializer(),
+            0777
+        );
+
+        $adapter->set('a', 'b', 10);
+
+        $this->assertEquals('b', $adapter->get('a'));
+        $this->assertTrue($adapter->ttl('a') > 0);
+
+        $adapter->set('b', 'a', -10);
+        $this->assertNull($adapter->get('b'));
+
+        $adapter->delete('b');
+        $adapter->delete('a');
+    }
+
+    public function testDefaultTtl()
+    {
+        $location = $this->getTmpDirectory();
+        $adapter = new FilesystemAdapter(
+            $location,
+            new JsonSerializer(),
+            0777,
+            10
+        );
+
+        $adapter->set('a', 'b');
+        $this->assertTrue($adapter->ttl('a') > 0);
+        $adapter->delete('a');
+    }
+
+    public function testDelete()
+    {
+        $location = $this->getTmpDirectory();
+        $adapter = new FilesystemAdapter(
+            $location,
+            new JsonSerializer(),
+            0777
+        );
+
+        $adapter->set('del-a', 'a');
+        $adapter->set('del-b', 'b');
+        $adapter->delete('del*');
+        $this->assertNull($adapter->get('del-a'));
+        $this->assertNull($adapter->get('del-b'));
+    }
+
+    public function testSubFolder()
+    {
+        $location = $this->getTmpDirectory();
+        $adapter = new FilesystemAdapter(
+            $location,
+            new JsonSerializer(),
+            0777
+        );
+
+        $adapter->set('a/b', 'a');
+        $this->assertEquals('a', $adapter->get('a/b'));
+        $adapter->delete('a/b');
+    }
+
+    public function testSubFolderWithSeperator()
+    {
+        $location = $this->getTmpDirectory();
+        $adapter = new FilesystemAdapter(
+            $location,
+            new JsonSerializer(),
+            0777,
+            null,
+            '/'
+        );
+
+        $adapter->set('a/b', 'a');
+        $this->assertEquals('a', $adapter->get('a/b'));
+        $adapter->delete('a/b');
+    }
+}
\ No newline at end of file
diff --git a/test/Unit/Adapter/MemoryAdapterTest.php b/test/Unit/Adapter/MemoryAdapterTest.php
new file mode 100644
index 0000000..ff1420e
--- /dev/null
+++ b/test/Unit/Adapter/MemoryAdapterTest.php
@@ -0,0 +1,42 @@
+<?php
+declare(strict_types=1);
+
+namespace IQParts\CacheTest\Unit\Adapter;
+
+use IQParts\Cache\Adapter\MemoryAdapter;
+use IQParts\CacheTest\AbstractTestCase;
+
+final class MemoryAdapterTest extends AbstractTestCase
+{
+    public function testAdapter()
+    {
+        $adapter = new MemoryAdapter();
+        $this->assertEquals(null, $adapter->get('a'));
+
+        $adapter->set('a', 'b');
+        $this->assertEquals('b', $adapter->get('a'));
+
+        $adapter->delete('a');
+        $this->assertEquals(null, $adapter->get('a'));
+
+        $adapter->set('a-keys', 'a');
+        $adapter->set('b-keys', 'a');
+        $this->assertEquals(['a-keys'], $adapter->keys('a*'));
+
+        $adapter->set('a', 'b', 200);
+        $this->assertTrue($adapter->ttl('a') > 0);
+        $this->assertTrue($adapter->ttl('c') === MemoryAdapter::NO_TTL);
+    }
+
+    public function testTtl()
+    {
+        $adapter = new MemoryAdapter();
+        $adapter->set('a', 'b', 10);
+
+        $this->assertEquals('b', $adapter->get('a'));
+        $this->assertTrue($adapter->ttl('a') > 0);
+
+        $adapter->set('b', 'a', -10);
+        $this->assertNull($adapter->get('b'));
+    }
+}
\ No newline at end of file
diff --git a/test/Unit/Adapter/NamespaceAdapterTest.php b/test/Unit/Adapter/NamespaceAdapterTest.php
new file mode 100644
index 0000000..69aa800
--- /dev/null
+++ b/test/Unit/Adapter/NamespaceAdapterTest.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace IQParts\CacheTest\Unit\Adapter;
+
+use IQParts\Cache\Adapter\MemoryAdapter;
+use IQParts\CacheTest\AbstractTestCase;
+use IQParts\Cache\Adapter\CacheAdapterInterface;
+use IQParts\Cache\Adapter\NamespaceAdapter;
+use PhpParser\Node\Name;
+
+final class NamespaceAdapterTest extends AbstractTestCase
+{
+    /**
+     * @var CacheAdapterInterface
+     */
+    private $adapter;
+
+    public function setUp()
+    {
+        $this->adapter = new MemoryAdapter();
+    }
+
+    public function testGet()
+    {
+        $adapter = new NamespaceAdapter('test', $this->adapter);
+        $adapter->set('mykey', 'a');
+        $this->assertEquals('test:mykey', $this->adapter->keys()[0]);
+        $this->assertEquals('a', $adapter->get('mykey'));
+    }
+
+    public function testSet()
+    {
+        $adapter = new NamespaceAdapter('test', $this->adapter);
+        $adapter->set('mykey', null);
+        $this->assertEquals('test:mykey', $this->adapter->keys()[0]);
+    }
+
+    public function testDelete()
+    {
+        $adapter = new NamespaceAdapter('test', $this->adapter);
+        $adapter->delete('mykey');
+        $this->assertEquals(null, $this->adapter->get('mykey'));
+    }
+
+    public function testKeys()
+    {
+        $adapter = new NamespaceAdapter('test', $this->adapter);
+        $adapter->set('a-keys', 'a');
+        $adapter->set('b-keys', 'b');
+        $this->assertEquals(['a-keys'], $adapter->keys('a-*'));
+        $this->assertEquals(['a-keys'], $adapter->keys('a-'));
+    }
+
+    public function testTtl()
+    {
+        $adapter = new NamespaceAdapter('test', $this->adapter);
+        $adapter->set('a', 'b', 10);
+        $this->assertTrue($adapter->ttl('a') > 0);
+    }
+
+}
\ No newline at end of file
diff --git a/test/Unit/Adapter/NullAdapterTest.php b/test/Unit/Adapter/NullAdapterTest.php
new file mode 100644
index 0000000..2265372
--- /dev/null
+++ b/test/Unit/Adapter/NullAdapterTest.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace IQParts\CacheTest\Unit\Adapter;
+
+use IQParts\CacheTest\AbstractTestCase;
+use IQParts\Cache\Adapter\NullAdapter;
+
+final class NullAdapterTest extends AbstractTestCase
+{
+    public function testNullAdapter()
+    {
+        $adapter = new NullAdapter();
+        $adapter->set('a', 'b');
+        $this->assertEquals(null, $adapter->get('a'));
+        $adapter->delete('a');
+        $this->assertEquals([], $adapter->keys());
+        $this->assertEquals(0, $adapter->ttl('a'));
+    }
+}
\ No newline at end of file
diff --git a/test/Unit/Adapter/PredisAdapterTest.php b/test/Unit/Adapter/PredisAdapterTest.php
new file mode 100644
index 0000000..c8d5727
--- /dev/null
+++ b/test/Unit/Adapter/PredisAdapterTest.php
@@ -0,0 +1,114 @@
+<?php
+declare(strict_types=1);
+
+namespace IQParts\CacheTest\Unit\Adapter;
+
+use IQParts\Cache\Adapter\PredisAdapter;
+use IQParts\Cache\Serializer\JsonSerializer;
+use IQParts\CacheTest\AbstractTestCase;
+use Predis\ClientInterface;
+
+final class PredisAdapterTest extends AbstractTestCase
+{
+    public function testGet()
+    {
+        $client = $this->createMock(ClientInterface::class);
+        $client
+            ->expects($this->at(0))
+            ->method('__call')
+            ->with('get', ['a'])
+            ->willReturn(null);
+
+        /** @var ClientInterface $client */
+        $cache = new PredisAdapter($client, new JsonSerializer());
+        $this->assertNull($cache->get('a'));
+    }
+
+    public function testSet()
+    {
+        $client = $this->createMock(ClientInterface::class);
+        $client
+            ->expects($this->at(0))
+            ->method('__call')
+            ->with('set', ['a', 'b']);
+        $client
+            ->expects($this->at(1))
+            ->method('__call')
+            ->with('get', ['a'])
+            ->willReturn('b');
+
+        /** @var ClientInterface $client */
+        $cache = new PredisAdapter($client, new JsonSerializer());
+        $cache->set('a', 'b');
+        $this->assertEquals('b', $cache->get('a'));
+    }
+
+    public function testDelete()
+    {
+        $client = $this->createMock(ClientInterface::class);
+        $client
+            ->expects($this->at(0))
+            ->method('__call')
+            ->with('set', ['a', 'b']);
+        $client
+            ->expects($this->at(1))
+            ->method('__call')
+            ->with('del', [['a']])
+            ->willReturn(1);
+        $client
+            ->expects($this->at(2))
+            ->method('__call')
+            ->with('get', ['a'])
+            ->willReturn(null);
+
+        /** @var ClientInterface $client */
+        $cache = new PredisAdapter($client, new JsonSerializer());
+        $cache->set('a', 'b');
+        $cache->delete('a');
+        $this->assertNull($cache->get('a'));
+    }
+
+    public function testTtl()
+    {
+        $client = $this->createMock(ClientInterface::class);
+        $client
+            ->expects($this->at(0))
+            ->method('__call')
+            ->with('setex', ['a', 200, 'b']);
+        $client
+            ->expects($this->at(1))
+            ->method('__call')
+            ->with('ttl', ['a'])
+            ->willReturn(200);
+
+        /** @var ClientInterface $client */
+        $cache = new PredisAdapter($client, new JsonSerializer());
+        $cache->set('a', 'b', 200);
+        $this->assertEquals(200, $cache->ttl('a'));
+    }
+
+    public function testKeys()
+    {
+        $client = $this->createMock(ClientInterface::class);
+        $client
+            ->expects($this->at(0))
+            ->method('__call')
+            ->with('set', ['a-keys', '1']);
+        $client
+            ->expects($this->at(1))
+            ->method('__call')
+            ->with('set', ['b-keys', '1']);
+        $client
+            ->expects($this->at(2))
+            ->method('__call')
+            ->with('keys', ['a*'])
+            ->willReturn(['a-keys']);
+
+        /** @var ClientInterface $client */
+        $cache = new PredisAdapter($client, new JsonSerializer());
+        $cache->set('a-keys', '1');
+        $cache->set('b-keys', '1');
+        $this->assertEquals(['a-keys'], $cache->keys('a*'));
+
+    }
+}
\ No newline at end of file
diff --git a/test/Unit/Serializer/JsonSerializerTest.php b/test/Unit/Serializer/JsonSerializerTest.php
new file mode 100644
index 0000000..3b3c32c
--- /dev/null
+++ b/test/Unit/Serializer/JsonSerializerTest.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace IQParts\CacheTest\Unit\Serializer;
+
+use IQParts\CacheTest\AbstractTestCase;
+use IQParts\Cache\Serializer\JsonSerializer;
+
+final class JsonSerializerTest extends AbstractTestCase
+{
+    public function testSerialize()
+    {
+        $serializer = new JsonSerializer();
+        $string = "myString";
+        $array = [0 => '1', 1 => '2', 2 => '3'];
+
+        $this->assertTrue(is_string($serializer->serialize($array)));
+        $this->assertEquals($string, $serializer->serialize($string));
+
+        $this->assertEquals($array, $serializer->deserialize($serializer->serialize($array)));
+    }
+
+}
\ No newline at end of file
diff --git a/test/Unit/Serializer/NoSerializerTest.php b/test/Unit/Serializer/NoSerializerTest.php
new file mode 100644
index 0000000..b34d583
--- /dev/null
+++ b/test/Unit/Serializer/NoSerializerTest.php
@@ -0,0 +1,22 @@
+<?php
+declare(strict_types=1);
+
+namespace IQParts\CacheTest\Unit\Serializer;
+
+use IQParts\Cache\Serializer\NoSerializer;
+use IQParts\CacheTest\AbstractTestCase;
+
+final class NoSerializerTest extends AbstractTestCase
+{
+    public function testSerialize()
+    {
+        $serializer = new NoSerializer();
+        $this->assertEquals('a', $serializer->serialize('a'));
+    }
+
+    public function testDeserialize()
+    {
+        $serializer = new NoSerializer();
+        $this->assertEquals('a', $serializer->deserialize('a'));
+    }
+}
\ No newline at end of file