Implementation

Author: arzola

composer.json

@@ -6,7 +6,8 @@
     "psr-4": {
       "App\\": "./src",
       "Properties\\": "./src/Properties",
-      "LateStatic\\": "./src/LateStatic"
+      "LateStatic\\": "./src/LateStatic",
+      "Db\\": "./src/Database"
     }
   }
 }

src/Database/Connection.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Db;
+use Db\Drivers\DatabaseDriver;
+
+
+class Connection
+{
+    private $driver;
+
+    /**
+     * Connection constructor.
+     */
+    public function __construct(DatabaseDriver $driver)
+    {
+        $this->driver = $driver;
+    }
+
+    public function getDriver()
+    {
+        return $this->driver->getName();
+    }
+
+}

src/Database/Drivers/DatabaseDriver.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace Db\Drivers;
+
+
+abstract class DatabaseDriver
+{
+    final public function getName()
+    {
+        //TODO
+    }
+}

src/Database/Drivers/MySql.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace Db\Drivers;
+
+class MySql
+{
+
+}

src/Database/Drivers/Oracle.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace Db\Drivers;
+
+class Oracle
+{
+
+}

src/Database/PersistentConnection.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace Db;
+
+use Db\Drivers\DatabaseDriver;
+
+class PersistentConnection extends Connection
+{
+
+    public function __construct(DatabaseDriver $driver)
+    {
+        $this->type = 'Persistent';
+    }
+
+}

tests/ConnectionTest.php

@@ -0,0 +1,33 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+use Db\Connection;
+use Db\PersistentConnection;
+use Db\Drivers\MySql;
+use Db\Drivers\Oracle;
+
+class ConnectionTest extends TestCase
+{
+    public function test_if_mysql_connection_is_established()
+    {
+        $connection = new Connection(new MySql);
+        $driver = $connection->getDriver();
+        $this->assertEquals('Connected to: Db\Drivers\MySql', $driver);
+    }
+
+    public function test_if_oracle_connection_is_established()
+    {
+        $connection = new Connection(new Oracle);
+        $driver = $connection->getDriver();
+        $this->assertEquals('Connected to: Db\Drivers\Oracle', $driver);
+    }
+
+    public function test_if_child_connection_works()
+    {
+        $connection = new PersistentConnection(new MySql);
+        $driver = $connection->getDriver();
+        $this->assertEquals('Connected to: Db\Drivers\MySql', $driver);
+        $this->assertEquals('Persistent', $connection->getType());
+    }
+
+}