#8 - Added postalcode vo

Author: danitome24

src/PhpValueObject/Geography/PostalCode.php

@@ -0,0 +1,55 @@
+<?php
+/**
+ * This software was built by:
+ * Daniel Tomé Fernández <danieltomefer@gmail.com>
+ * GitHub: danitome24
+ */
+
+namespace PhpValueObject\Geography;
+
+use PhpValueObject\ValueObject;
+
+final class PostalCode implements ValueObject
+{
+    /**
+     * @var string
+     */
+    private $code;
+
+    /**
+     * PostalCode constructor.
+     * @param string $code
+     */
+    private function __construct(string $code)
+    {
+        $this->code = $code;
+    }
+
+    /**
+     * @param string $code
+     * @return static
+     */
+    public static function fromCode(string $code)
+    {
+        return new static($code);
+    }
+
+    /**
+     * @return string
+     */
+    public function code(): string
+    {
+        return $this->code;
+    }
+
+    /**
+     * Compare a value object with another one.
+     *
+     * @param static|ValueObject $valueObjectToCompare
+     * @return bool
+     */
+    public function equals(ValueObject $valueObjectToCompare): bool
+    {
+        return ($this->code() === $valueObjectToCompare->code());
+    }
+}

tests/Geography/PostalCodeTest.php

@@ -0,0 +1,40 @@
+<?php
+/**
+ * This software was built by:
+ * Daniel Tomé Fernández <danieltomefer@gmail.com>
+ * GitHub: danitome24
+ */
+
+namespace Geography;
+
+use PhpValueObject\Geography\PostalCode;
+use PHPUnit\Framework\TestCase;
+
+class PostalCodeTest extends TestCase
+{
+    public function testPostalCodeIsBuilt()
+    {
+        $pc = 'CE-1234';
+        $postalCode = PostalCode::fromCode('CE-1234');
+        $this->assertEquals($pc, $postalCode->code());
+    }
+
+    /**
+     * @dataProvider postalCodes
+     * @param PostalCode $postalCode
+     * @param PostalCode $postalCodeToCompare
+     * @param bool $isEquals
+     */
+    public function testEqualsMethod(PostalCode $postalCode, PostalCode $postalCodeToCompare, bool $isEquals)
+    {
+        $this->assertEquals($isEquals, $postalCode->equals($postalCodeToCompare));
+    }
+
+    public function postalCodes()
+    {
+        return [
+            [PostalCode::fromCode(1231), PostalCode::fromCode('CE-123'), false],
+            [PostalCode::fromCode('CE-123'), PostalCode::fromCode('CE-123'), true]
+        ];
+    }
+}