Add test/CommonMarkTestWeak.php

test/CommonMarkTest.php

@@ -13,7 +13,9 @@ class CommonMarkTest extends PHPUnit_Framework_TestCase
 
     protected function setUp()
     {
-        $this->parsedown = new Parsedown();
+        require_once(__DIR__ . '/TestParsedown.php');
+
+        $this->parsedown = new TestParsedown();
         $this->parsedown->setUrlsLinked(false);
     }
 

test/CommonMarkTestWeak.php

@@ -0,0 +1,61 @@
+<?php
+require_once(__DIR__ . '/CommonMarkTest.php');
+
+/**
+ * Test Parsedown against the CommonMark spec, but less aggressive
+ *
+ * The resulting HTML markup is cleaned up before comparison, so examples
+ * which would normally fail due to actually invisible differences (e.g.
+ * superfluous whitespaces), don't fail. However, cleanup relies on block
+ * element detection. The detection doesn't work correctly when a element's
+ * `display` CSS property is manipulated. According to that this test is only
+ * a interim solution on Parsedown's way to full CommonMark compatibility.
+ *
+ * @link http://commonmark.org/ CommonMark
+ */
+class CommonMarkTestWeak extends CommonMarkTest
+{
+    protected function setUp()
+    {
+        parent::setUp();
+
+        $textLevelElements = $this->parsedown->getTextLevelElements();
+
+        array_walk($textLevelElements, function (&$element) {
+            $element = preg_quote($element, '/');
+        });
+        $this->textLevelElementRegex = '\b(?:' . implode('|', $textLevelElements) . ')\b';
+    }
+
+    /**
+     * @dataProvider data
+     * @param $section
+     * @param $markdown
+     * @param $expectedHtml
+     */
+    public function testExample($section, $markdown, $expectedHtml)
+    {
+        $expectedHtml = $this->cleanupHtml($expectedHtml);
+
+        $actualHtml = $this->parsedown->text($markdown);
+        $actualHtml = $this->cleanupHtml($actualHtml);
+
+        $this->assertEquals($expectedHtml, $actualHtml);
+    }
+
+    protected function cleanupHtml($markup)
+    {
+        // invisible whitespaces at the beginning and end of block elements
+        // however, whitespaces at the beginning of <pre> elements do matter
+        $markup = preg_replace(
+            array(
+                '/(<(?!(?:' . $this->textLevelElementRegex . '|\bpre\b))\w+\b[^>]*>(?:<' . $this->textLevelElementRegex . '[^>]*>)?)\s+/s',
+                '/\s+((?:<\/' . $this->textLevelElementRegex . '>)?<\/(?!' . $this->textLevelElementRegex . ')\w+\b>)/s'
+            ),
+            '$1',
+            $markup
+        );
+
+        return $markup;
+    }
+}

test/TestParsedown.php

@@ -2,4 +2,8 @@
 
 class TestParsedown extends Parsedown
 {
+    public function getTextLevelElements()
+    {
+        return $this->textLevelElements;
+    }
 }