Transform specs to something useful

spec/fixtures/markdown/file.markdown

@@ -1,3 +1,20 @@
 ## File.markdown
 
-:cool:
+:cool:
+
+```ruby
+def func
+  x = 1
+end
+```
+
+```
+function f(x) {
+  return x++;
+}
+```
+
+```kombucha
+drink-that-stuff:
+  tastes-weird~
+```

src/packages/markdown-preview/spec/markdown-preview-view-spec.coffee

@@ -31,3 +31,13 @@ describe "MarkdownPreviewView", ->
     it "reassociates with the same buffer when deserialized", ->
       newPreview = deserialize(preview.serialize())
       expect(newPreview.buffer).toBe buffer
+
+  fdescribe "code block tokenization", ->
+    describe "when the code block's fence name has a matching grammar", ->
+      it "tokenizes the code block with the grammar", ->
+        expect(preview.find("pre code.lang-ruby .entity.name.function.ruby")).toExist()
+
+    describe "when the code block's fence name doesn't have a matching grammar", ->
+      it "does not tokenize the code block", ->
+        expect(preview.find("pre code:not([class])").children().length).toBe 0
+        expect(preview.find("pre code.lang-kombucha").children().length).toBe 0