Simplify code and fix tests

Author: ggrossetie

lib/graphgists/asciidoc-preprocessing.js

@@ -36,7 +36,7 @@ function preprocessing(asciidoc) {
   let currentSourceBlockDefinition = {}
   let currentRoles = []
   const updateMap = {}
-  lines
+  return lines
     .map((line, index) => {
       if (line.startsWith('[source,cypher') && line.trim().endsWith(']')) {
         const blockDefintionWithRoles = addRolesInBlockDefinition(line, ['runnable', 'backend:graphgist', ...currentRoles])
@@ -68,8 +68,8 @@ function preprocessing(asciidoc) {
         return updateMap[index]
       }
       return line
-    }) = lines
-  return lines.join('\n')
+    })
+    .join('\n')
 }
 
 module.exports = {

specs/graphgist-asciidoc-preprocessing.spec.js

@@ -180,7 +180,29 @@ query
 
 //setup
 // hide
-[source,cypher,role="foo bar runnable backend:graphgist instant hidden"]
+[source,cypher,role="foo bar runnable backend:graphgist instant single hidden"]
+----
+query
+----
+`)
+  })
+  it('should add single role on Cypher source block when // setup is present', async () => {
+    const result = preprocessing(`= Title
+
+== Section
+
+//setup
+[source,cypher,role="foo bar"]
+----
+query
+----
+`)
+    expect(result).to.equal(`= Title
+
+== Section
+
+//setup
+[source,cypher,role="foo bar runnable backend:graphgist instant single"]
 ----
 query
 ----