WIP: Introduce attribute callback tests

tests/php/AttributesTest.php

@@ -0,0 +1,105 @@
+<?php
+
+namespace ipl\Tests\Html;
+
+use Exception;
+use RuntimeException;
+use UnexpectedValueException;
+use ipl\Html\Attribute;
+use ipl\Html\Attributes;
+
+class AttributesTest extends TestCase
+{
+    public function testGetterCallbackInGet()
+    {
+        $callback = function () {
+            return new Attribute('callback', 'value from callback');
+        };
+
+        $attributes = (new Attributes())
+            ->setCallback('callback', $callback);
+
+        $this->assertSame($attributes->get('callback')->getValue(), 'value from callback');
+    }
+
+    public function testSetterCallbackInSet()
+    {
+        $element = new ElementWithCallbackAttributes();
+
+        $attributes = $element->getAttributes();
+
+        $attributes->set('name', 'name from test');
+
+        $this->assertSame('name from test', $attributes->get('name')->getValue());
+        $this->assertSame('name from test', $element->getName());
+    }
+
+    public function testSetterCallbackInAdd()
+    {
+        $element = new ElementWithCallbackAttributes();
+
+        $attributes = $element->getAttributes();
+
+        $attributes->add('name', 'name from test');
+
+        $this->assertSame('name from test', $attributes->get('name')->getValue());
+        $this->assertSame('name from test', $element->getName());
+    }
+
+    public function testSetterCallbackIsProxied()
+    {
+        $element = new ElementWithCallbackAttributes();
+
+        $attributes = $element->getAttributes();
+
+        $attributes->get('name')->setValue('name from test');
+
+        $this->assertSame('name from test', $attributes->get('name')->getValue());
+        $this->assertSame('name from test', $element->getName());
+    }
+
+    /**
+     * @expectedException RuntimeException
+     */
+    public function testCantOverrideCallbacks()
+    {
+        $callback = function () {
+            return new Attribute('callback', 'value from callback');
+        };
+
+        $attributes = (new Attributes())
+            ->setCallback('callback', $callback);
+
+        $attributes->set('callback', 'overridden');
+    }
+
+    /**
+     * @expectedException RuntimeException
+     */
+    public function testGetterCallbackRuntimeException()
+    {
+        $callback = function () {
+            throw new Exception();
+        };
+
+        $attributes = (new Attributes())
+            ->setCallback('callback', $callback);
+
+        $attributes->get('callback');
+    }
+
+    /**
+     * @expectedException UnexpectedValueException
+     */
+    public function testGetterCallbackValueException()
+    {
+        $callback = function () {
+            return [];
+        };
+
+        $attributes = (new Attributes())
+            ->setCallback('callback', $callback);
+
+        $attributes->get('callback');
+    }
+}

tests/php/ElementWithCallbackAttributes.php

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+<?php
+
+namespace ipl\Tests\Html;
+
+use ipl\Html\BaseHtmlElement;
+
+class ElementWithCallbackAttributes extends BaseHtmlElement
+{
+    protected $name;
+
+    public function __construct()
+    {
+        $this->registerCallbacks();
+    }
+
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    public function setName($name)
+    {
+        $this->name = $name;
+
+        return $this;
+    }
+
+    protected function registerCallbacks()
+    {
+        $this->getAttributes()->setCallback('name', [$this, 'getName'], [$this, 'setName']);
+    }
+}