add test for PlantUml Ditaa

tests/lib/markdown-test.js

@@ -93,3 +93,8 @@ test('Markdown.render() should render PlantUML Umls correctly', t => {
   const rendered = md.render(markdownFixtures.plantUmlUml)
   t.snapshot(rendered)
 })
+
+test('Markdown.render() should render PlantUML Ditaa correctly', t => {
+  const rendered = md.render(markdownFixtures.plantUmlDitaa)
+  t.snapshot(rendered)
+})

tests/lib/snapshots/markdown-test.js.md

@@ -4,6 +4,13 @@ The actual snapshot is saved in `markdown-test.js.snap`.
 
 Generated by [AVA](https://ava.li).
 
+## Markdown.render() should render PlantUML Ditaa correctly
+
+> Snapshot 1
+
+    `<img src="http://www.plantuml.com/plantuml/png/SoWkIImgISaiIKpaqjQ50cq51GLj93Q2mrMZ00NQO3cmHX3RJW4cKmDI4v9QKQ805a8nfyObCp6zA34NgCObFxiqDpMl1AIcHj4tCJqpLH5i18evG52TKbk3B8og1kmC0cvMKB1Im0NYkA2ckMRcANWabgQbvYau5YMbPfP0p4UOWmcqkHnIyrB0GG00" alt="uml diagram" />␊
+    `
+
 ## Markdown.render() should render PlantUML Gantt correctly
 
 > Snapshot 1