#6 - Added height to VO

Author: danitome24

src/PhpValueObject/Person/Exception/HeightLengthWrongException.php

@@ -0,0 +1,18 @@
+<?php
+/**
+ * This software was built by:
+ * Daniel Tomé Fernández <[email protected]>
+ * GitHub: danitome24
+ */
+
+namespace PhpValueObject\Person\Exception;
+
+use Throwable;
+
+class HeightLengthWrongException extends \Exception
+{
+    public function __construct($message = "", $code = 0, Throwable $previous = null)
+    {
+        parent::__construct($message, $code, $previous);
+    }
+}

src/PhpValueObject/Person/Height.php

@@ -0,0 +1,90 @@
+<?php
+/**
+ * This software was built by:
+ * Daniel Tomé Fernández <[email protected]>
+ * GitHub: danitome24
+ */
+
+namespace PhpValueObject\Person;
+
+use PhpValueObject\Person\Exception\HeightLengthWrongException;
+use PhpValueObject\ValueObject;
+
+final class Height implements ValueObject
+{
+    const MAX_HEIGHT = 210;
+    const MIN_HEIGHT = 10;
+
+    /**
+     * Height in cm
+     *
+     * @var int
+     */
+    private $height;
+
+    /**
+     * Height constructor.
+     * @param int $height
+     * @throws \PhpValueObject\Person\Exception\HeightLengthWrongException
+     */
+    private function __construct(int $height)
+    {
+        $this->changeHeight($height);
+    }
+
+    /**
+     * @param int $height
+     * @return Height
+     * @throws \PhpValueObject\Person\Exception\HeightLengthWrongException
+     */
+    public static function build(int $height): self
+    {
+        return new static($height);
+    }
+
+    /**
+     * Height in centimeters
+     *
+     * @return int
+     */
+    public function inCentimeters(): int
+    {
+        return $this->height;
+    }
+
+    /**
+     * Height in meters
+     *
+     * @return float
+     */
+    public function inMeters(): float
+    {
+        return $this->height / 100;
+    }
+
+    /**
+     * Compare a value object with another one.
+     *
+     * @param self|ValueObject $valueObjectToCompare
+     * @return bool
+     */
+    public function equals(ValueObject $valueObjectToCompare): bool
+    {
+        return ($this->inMeters() === $valueObjectToCompare->inMeters());
+    }
+
+    /**
+     * Change height and check if is valid before is added
+     *
+     * @param int $height
+     * @throws HeightLengthWrongException
+     */
+    private function changeHeight(int $height)
+    {
+        if ($height > self::MAX_HEIGHT || $height < self::MIN_HEIGHT) {
+            throw new HeightLengthWrongException();
+        }
+
+        $this->height = $height;
+    }
+}

tests/Person/HeightTest.php

@@ -0,0 +1,58 @@
+<?php
+/**
+ * This software was built by:
+ * Daniel Tomé Fernández <[email protected]>
+ * GitHub: danitome24
+ */
+
+namespace Test\Person;
+
+use PHPUnit\Framework\TestCase;
+use PhpValueObject\Person\Exception\HeightLengthWrongException;
+use PhpValueObject\Person\Height;
+
+class HeightTest extends TestCase
+{
+    public function testHeightIsLessThanMinimumException()
+    {
+        $this->expectException(HeightLengthWrongException::class);
+
+        $height = Height::build(2);
+    }
+
+    public function testHeightIsMoreThanMinimumException()
+    {
+        $this->expectException(HeightLengthWrongException::class);
+
+        $height = Height::build(25000);
+    }
+
+    public function testHeightInstanceValues()
+    {
+        $height = Height::build(193);
+        $this->assertEquals(1.93, $height->inMeters());
+        $this->assertEquals(193, $height->inCentimeters());
+    }
+
+    /**
+     * @dataProvider heights
+     * @param Height $height
+     * @param Height $heightToCompare
+     * @param bool $isEquals
+     */
+    public function testHeightEqualsMethod(Height $height, Height $heightToCompare, bool $isEquals)
+    {
+        $this->assertEquals($isEquals, $height->equals($heightToCompare));
+    }
+
+    /**
+     * @return array
+     */
+    public function heights(): array
+    {
+        return [
+            [Height::build(190), Height::build(180), false],
+            [Height::build(190), Height::build(190), true]
+        ];
+    }
+}