From 9c91ad8650adc1f0eab1055b76e3940fd6ec4f50 Mon Sep 17 00:00:00 2001
From: Eric Lippmann <eric.lippmann@icinga.com>
Date: Mon, 6 Aug 2018 15:15:01 +0200
Subject: [PATCH] WIP: Introduce attribute callback tests

---
 tests/AttributesTest.php                      | 92 +++++++++++++++++++
 .../ElementWithCallbackAttributes.php         | 32 +++++++
 2 files changed, 124 insertions(+)
 create mode 100644 tests/TestDummy/ElementWithCallbackAttributes.php

diff --git a/tests/AttributesTest.php b/tests/AttributesTest.php
index 50f922d3..eba3c346 100644
--- a/tests/AttributesTest.php
+++ b/tests/AttributesTest.php
@@ -2,7 +2,12 @@
 
 namespace ipl\Tests\Html;
 
+use Exception;
+use ipl\Html\Attribute;
 use ipl\Html\Attributes;
+use ipl\Tests\Html\TestDummy\ElementWithCallbackAttributes;
+use RuntimeException;
+use UnexpectedValueException;
 
 class AttributesTest extends TestCase
 {
@@ -38,4 +43,91 @@ public function testForeach()
             next($attrs);
         }
     }
+
+    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());
+    }
+
+    public function testCantOverrideCallbacks()
+    {
+        $callback = function () {
+            return new Attribute('callback', 'value from callback');
+        };
+
+        $attributes = (new Attributes())
+            ->setCallback('callback', $callback);
+
+        $this->expectException(RuntimeException::class);
+        $attributes->set('callback', 'overridden');
+    }
+
+    public function testGetterCallbackRuntimeException()
+    {
+        $callback = function () {
+            throw new Exception();
+        };
+
+        $attributes = (new Attributes())
+            ->setCallback('callback', $callback);
+
+        $this->expectException(RuntimeException::class);
+        $attributes->get('callback');
+    }
+
+    public function testGetterCallbackValueException()
+    {
+        $callback = function () {
+            return [];
+        };
+
+        $attributes = (new Attributes())
+            ->setCallback('callback', $callback);
+
+        $this->expectException(UnexpectedValueException::class);
+        $attributes->get('callback');
+    }
 }
diff --git a/tests/TestDummy/ElementWithCallbackAttributes.php b/tests/TestDummy/ElementWithCallbackAttributes.php
new file mode 100644
index 00000000..fb18e6ba
--- /dev/null
+++ b/tests/TestDummy/ElementWithCallbackAttributes.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace ipl\Tests\Html\TestDummy;
+
+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']);
+    }
+}