Fix a character escape issue with the Mermaid formatter that could re…

…sult in invalid syntax.

CHANGELOG.md

@@ -5,6 +5,7 @@ New Features:
 Bug Fixes:
 
 * Fixed an invalid method call in `bgv2json` (#82, @nirvdrum).
+* Fixed a character escape issue with the Mermaid formatter that could result in invalid syntax (#87, @nirvdrum).
 
 Changes:
 

lib/seafoam/mermaid_writer.rb

@@ -38,7 +38,7 @@ def output_node(indent, id, attrs)
       when "diamond"
         shape = ["{{", "}}"]
       end
-      @stream.puts "#{indent}#{id}#{shape[0]}#{attrs[:label].inspect}#{shape[1]}"
+      @stream.puts "#{indent}#{id}#{shape[0]}#{attrs[:label].gsub('"', "#quot;").inspect}#{shape[1]}"
       @stream.puts "#{indent}style #{id} fill:#{attrs[:fillcolor]},stroke:#{attrs[:color]},color:#{attrs[:fontcolor]};"
     end
 

spec/seafoam/mermaid_write_spec.rb

@@ -44,5 +44,20 @@
         end
       end
     end
+
+    it "escapes quotes in labels" do
+      attrs = {
+        color: "black",
+        fillcolor: "#f9f9f9",
+        fontcolor: "#1a1919",
+        fontname: "Arial",
+        label: "\"abc\"",
+        shape: "rectangle",
+        style: "filled",
+      }
+
+      @writer.send(:output_node, "", "node0", attrs)
+      expect(@stream.string).to(include("node0(\"#quot;abc#quot;\")"))
+    end
   end
 end