67 lines
1.1 KiB
PHP
67 lines
1.1 KiB
PHP
<?php
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// Liskov Substitution Principle Violation
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// The Rectangle - Square problem
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class Rectangle
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{
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protected $width;
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protected $height;
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public function setHeight($height)
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{
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$this->height = $height;
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}
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public function getHeight()
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{
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return $this->height;
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}
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public function setWidth($width)
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{
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$this->width = $width;
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}
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public function getWidth()
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{
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return $this->width;
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}
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public function area()
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{
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return $this->height * $this->width;
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}
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}
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class Square extends Rectangle
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{
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public function setHeight($value)
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{
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$this->width = $value;
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$this->height = $value;
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}
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public function setWidth($value)
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{
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$this->width = $value;
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$this->height = $value;
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}
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}
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class RectangleTest
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{
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private $rectangle;
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public function __construct(Rectangle $rectangle)
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{
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$this->rectangle = $rectangle;
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}
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public function testArea()
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{
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$this->rectangle->setHeight(2);
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$this->rectangle->setWidth(3);
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// Expect rectangle's area to be 6
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}
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}
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