Remove hacky testing of commonmark parsing testing

The commonmark parsing tests are already done by markdownit,
as suche we only need to test serializing. And of cause parsing of
markdown extensions we added.

The current "CommonMark" testing also had quite a lot of hacks
as even if we are commonmark compatible we do not yield the same html
representation (html is only a interim stage to tiptap).

Signed-off-by: Ferdinand Thiessen <rpm@fthiessen.de>

src/tests/markdown.spec.js

@@ -15,6 +15,7 @@ import createEditor from "../EditorFactory";
  * Please add test belonging to some Node or Mark to the corresponding file in './nodes/` or `./marks/`
  */
 
+// Goal: Input (commonmark) markdown should result in same output markdown
 describe('Commonmark', () => {
 	const skippedMarkdownTests = [
 		// we interpret this as front matter
@@ -24,45 +25,18 @@ describe('Commonmark', () => {
 		// contain comments
 		309, 308,
 		// < > are escaped, because HTML is disabled for markdown-it
-		201, 490, 493, 523, 535
+		//201, 490, 493, 523, 535
 	];
 
-	const normalize = (str) => {
-		// https://github.com/markdown-it/markdown-it/blob/df4607f1d4d4be7fdc32e71c04109aea8cc373fa/test/commonmark.js#L10
-		return str.replace(/<blockquote><\/blockquote>/g, '<blockquote>\n</blockquote>')
-			.replace(/<span class="keep-md">([^<]+)<\/span>/g, '$1')
-			.replace(/<br data-syntax=".{1,2}" \/>/g, '<br />\n')
-			.replace(/<ul data-bullet="."/g, '<ul')
-	}
-
-	// special treatment because we use markdown-it-image-figures
-	const figureImageMarkdownTests = [
-		516, 519, 530, 571, 572, 573, 574, 575, 576, 577, 579, 580, 581, 582, 583, 584, 585, 587, 588, 590
-	]
-
 	spec.forEach((entry) => {
 		// We do not support HTML
-		if (entry.section === 'HTML blocks' || entry.section === 'Raw HTML') return;
-
-		if (skippedMarkdownTests.indexOf(entry.example) !== -1) {
+		if (entry.section === 'HTML blocks' ||
+			entry.section === 'Raw HTML'	||
+			skippedMarkdownTests.indexOf(entry.example) !== -1) {
 			return
 		}
 
-		test('commonmark parsing ' + entry.example, () => {
-			let expected = entry.markdown.includes('__')
-				? entry.html.replace(/<strong>/g, '<u>').replace(/<\/strong>/g, '</u>')
-				: entry.html
-			if (figureImageMarkdownTests.indexOf(entry.example) !== -1) {
-				expected = expected.replace(/<p>/g, '<figure>').replace(/<\/p>/g, '</figure>')
-			}
-
-			const rendered = markdownit.render(entry.markdown)
-
-			// Ignore special markup for untouched markdown
-			expect(normalize(rendered)).toBe(expected)
-		})
-
-		test('commonmark serialization ' + entry.example, () => {
+		test('serializing ' + entry.example, () => {
 			const expected = markdownit.render(entry.markdown)
 			const serialized = markdownThroughEditorHtml(expected)