Add tests for icons

Author: Nate Wiebe

tests/IconTest.php

@@ -0,0 +1,106 @@
+<?php
+
+use Feather\Icon;
+use PHPUnit\Framework\TestCase;
+use PHPUnit\Util\Xml\Loader;
+
+class IconTest extends TestCase
+{
+    /**
+     * @var Icon
+     */
+    private $icon;
+
+    /**
+     * @var string
+     */
+    private $iconContent = '<polyline points="0 12 24 12" />';
+
+    protected function setUp(): void
+    {
+        $this->icon = new Icon('test', $this->iconContent, []);
+    }
+
+    public function testRender(): void
+    {
+        $iconString = \sprintf(
+            '<svg class="feather feather-%s" aria-hidden="true">%s</svg>',
+            $this->icon->getName(),
+            $this->iconContent
+        );
+
+        $this->assertXmlStringEqualsXmlString($iconString, $this->icon->render());
+    }
+
+    public function testToString(): void
+    {
+        $this->assertXmlStringEqualsXmlString($this->icon->render(), (string)$this->icon);
+    }
+
+    public function testAttributeFiltering(): void
+    {
+        $this->icon->setAttributes(['width' => 24, 'height' => null]);
+
+        $iconString = \sprintf(
+            '<svg class="feather feather-%s" aria-hidden="true" width="24">%s</svg>',
+            $this->icon->getName(),
+            $this->iconContent
+        );
+
+        $this->assertXmlStringEqualsXmlString($iconString, $this->icon->render());
+    }
+
+    public function testAttributeEscaping(): void
+    {
+        $this->icon->setAttributes(['data-title' => 'Quote " should be escaped']);
+
+        $iconString = \sprintf(
+            '<svg class="feather feather-%s" aria-hidden="true" data-title="Quote &quot; should be escaped">%s</svg>',
+            $this->icon->getName(),
+            $this->iconContent
+        );
+
+        $this->assertXmlStringEqualsXmlString($iconString, $this->icon->render());
+    }
+
+    public function testAltText(): void
+    {
+        $iconTitleId = 'feather-icon-title';
+
+        $this->icon->setAltText('Example alt text');
+
+        $iconString = \sprintf(
+            <<<SVG
+                <svg aria-labelledby="%s" class="feather feather-%s" role="img">
+                  <title id="%s">%s</title>
+                  %s
+                 </svg>
+            SVG,
+            $iconTitleId,
+            $this->icon->getName(),
+            $iconTitleId,
+            $this->icon->getAltText(),
+            $this->iconContent
+        );
+
+        $this->assertXmlStringEqualsXmlString($iconString, $this->changeSvgTitleId($this->icon->render(), $iconTitleId));
+    }
+
+    private function changeSvgTitleId(string $svg, string $id): string
+    {
+        $xmlLoader = new Loader();
+        $iconXml = $xmlLoader->load($svg);
+
+        $svgNode = $iconXml->firstChild;
+
+        $labelledByAttribute = $svgNode->attributes->getNamedItem('aria-labelledby');
+        $labelledByAttribute->nodeValue = $id;
+
+        $titleNode = $svgNode->childNodes->item(0);
+
+        $idAttribute = $titleNode->attributes->getNamedItem('id');
+        $idAttribute->nodeValue = $id;
+
+        return $iconXml->saveXML();
+    }
+}