Added Tcp port value object + tests

Author: rastafermo

src/PhpValueObjects/Network/Exception/InvalidTcpPortException.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace PhpValueObjects\Network\Exception;
+
+class InvalidTcpPortException extends \Exception
+{
+    /**
+     * InvalidUrlException constructor.
+     *
+     * @param string $value
+     */
+    public function __construct($value)
+    {
+        parent::__construct(sprintf('"%" is not a valid tcp port.', $value));
+    }
+}

src/PhpValueObjects/Network/TcpPort.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace PhpValueObjects\Network;
+
+use PhpValueObjects\AbstractValueObject;
+use PhpValueObjects\Network\Exception\InvalidTcpPortException;
+
+abstract class TcpPort extends AbstractValueObject
+{
+    /**
+     * @param string $value
+     *
+     * @throws InvalidTcpPortException
+     */
+    protected function guard($value)
+    {
+        if (false === filter_var($value, FILTER_VALIDATE_INT)) {
+            throw new InvalidTcpPortException($value);
+        }
+
+        if ($value < 0 || $value > 65535) {
+            throw new InvalidTcpPortException($value);
+        }
+    }
+}

src/PhpValueObjects/Tests/Network/TcpPortValueObject.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace PhpValueObjects\Tests\Network;
+
+use PhpValueObjects\Network\TcpPort;
+
+class TcpPortValueObject extends TcpPort
+{
+}

src/PhpValueObjects/Tests/Network/TcpPortValueObjectTest.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace PhpValueObjects\Tests\Network;
+
+use PhpValueObjects\Network\Exception\InvalidIpv6Exception;
+use PhpValueObjects\Network\Exception\InvalidTcpPortException;
+use PhpValueObjects\Tests\BaseUnitTestCase;
+
+class TcpPortValueObjectTest extends BaseUnitTestCase
+{
+    /**
+     * @test
+     */
+    public function itShouldReturnTcpPort()
+    {
+        $portNumber = $this->faker()->numberBetween(0, 65535);
+
+        $tcpPort = new TcpPortValueObject($portNumber);
+
+        $this->assertSame($portNumber, $tcpPort->value());
+    }
+
+    /**
+     * @return array
+     */
+    public function invalidTcpPortProvider()
+    {
+        return [
+            [null],
+            [$this->faker()->randomFloat()],
+            [$this->faker()->numberBetween(65536)],
+            [-$this->faker()->numberBetween()],
+        ];
+    }
+
+    /**
+     * @test
+     * @dataProvider invalidTcpPortProvider
+     */
+    public function itShouldThrowsException($data)
+    {
+        $this->expectException(InvalidTcpPortException::class);
+
+        new TcpPortValueObject($data);
+    }
+}