adds tests for RedisArray options

In order to test whether RedisArray options are correctly passed, use
uopz extension which allows to stub the constructor of PHP objects so we
can test the parameter passing without dependency-injection and factory
hell. It also keeps the API compatible because otherwise we would have
to pass e. g. factory.

tests/Stash/Test/Driver/AbstractDriverTest.php

@@ -65,10 +65,13 @@ protected function setUp()
         }
     }
 
-    protected function getFreshDriver()
+    protected function getFreshDriver(array $options = null)
     {
         $driverClass = $this->driverClass;
-        $options = $this->getOptions();
+
+        if ($options === null) {
+            $options = $this->getOptions();
+        }
 
         if (!$driverClass::isAvailable()) {
             return false;

tests/Stash/Test/Driver/RedisArrayTest.php

@@ -64,4 +64,50 @@ public function itShouldConstructARedisArray()
 
         $this->assertInstanceOf('\RedisArray', $redisArray);
     }
+
+    /**
+     * @test
+     */
+    public function itShouldPassOptionsToRedisArray()
+    {
+        $redisArrayOptions = array(
+            "previous"        => "something",
+            "function"        => function ($key) { return $key; },
+            "distributor"     => function ($key) { return 0; },
+            "index"           => "something",
+            "autorehash"      => "something",
+            "pconnect"        => "something",
+            "retry_interval"  => "something",
+            "lazy_connect"    => "something",
+            "connect_timeout" => "something",
+        );
+
+        $driverOptions = array_merge(
+            $this->getOptions(),
+            $redisArrayOptions
+        );
+
+        if (!extension_loaded('uopz')) {
+            $this->markTestSkipped('uopz extension is necessarry in order to stub "new".');
+        }
+
+        uopz_backup('\RedisArray', '__construct');
+
+        $self = $this;
+        uopz_function(
+            '\RedisArray',
+            '__construct',
+            function ($serverArray, $actualRedisArrayOptions) use ($self, $redisArrayOptions) {
+                $self->assertEquals(
+                    $redisArrayOptions,
+                    $actualRedisArrayOptions
+                );
+            }
+        );
+
+        $this->getFreshDriver($driverOptions);
+
+        uopz_restore('\RedisArray', '__construct');
+    }
+
 }

tests/travis/php_setup.sh

@@ -33,6 +33,15 @@ else
     rm -Rf phpredis
     echo "Finished installing phpredis extension."
 
+    echo ""
+    echo "******************************"
+    echo "Installing uopz extension if possible (PHP >=5.4)."
+    echo "******************************"
+    set +e
+    pecl install uopz
+    set -e
+    echo "Finished installing uopz extension."
+
     echo ""
     echo "*********************"
     echo "Updating php.ini file"