feat: import markdown-it-plugins from https://github.com/hedgedoc/markdown-it-plugins

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

markdown-it-plugins/src/image-size/index.test.ts

@@ -0,0 +1,56 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+import MarkdownIt from 'markdown-it/lib'
+
+import { imageSize } from './index.js'
+import { describe, expect, it } from '@jest/globals'
+
+describe('markdown-it-imsize', function () {
+  const md = new MarkdownIt({
+    html: true,
+    linkify: true,
+    typographer: true
+  }).use(imageSize)
+
+  it('renders a image without size or title', () => {
+    expect(md.renderInline('![test](x)')).toBe('<img src="x" alt="test">')
+  })
+
+  it('renders a image with title', () => {
+    expect(md.renderInline('![test](x "thisisthetitle")')).toBe('<img src="x" alt="test" title="thisisthetitle">')
+  })
+
+  it('renders an image with absolute width and height', () => {
+    expect(md.renderInline('![test](x =100x200)')).toBe('<img src="x" alt="test" width="100" height="200">')
+  })
+
+  it('renders an image with relative width and height', () => {
+    expect(md.renderInline('![test](x =100%x200%)')).toBe('<img src="x" alt="test" width="100%" height="200%">')
+  })
+
+  it('renders an image with title and size', () => {
+    expect(md.renderInline('![test](x "thisisthetitle" =100x200)')).toBe(
+      '<img src="x" alt="test" title="thisisthetitle" width="100" height="200">'
+    )
+  })
+
+  it('renders an image with no size but x', () => {
+    expect(md.renderInline('![test](x "thisisthetitle" =x)')).toBe('<img src="x" alt="test" title="thisisthetitle">')
+  })
+
+  it("doesn't render an image with invalid size syntax", () => {
+    expect(md.renderInline('![test](x "thisisthetitle" =xx)')).toBe('![test](x “thisisthetitle” =xx)')
+  })
+
+  it('renders an image with only width', () => {
+    expect(md.renderInline('![test](x =100x)')).toBe('<img src="x" alt="test" width="100">')
+  })
+
+  it('renders an image with only height', () => {
+    expect(md.renderInline('![test](x =x200)')).toBe('<img src="x" alt="test" height="200">')
+  })
+})