[cypher mode] Highlight empty string literals correctly

Author: pe4cey

mode/cypher/cypher.js

@@ -20,12 +20,12 @@
   CodeMirror.defineMode("cypher", function(config) {
     var tokenBase = function(stream/*, state*/) {
       var ch = stream.next();
-      if (ch === "\"") {
-        stream.match(/.+?["]/);
+      if (ch ==='"') {
+        stream.match(/.*?"/);
         return "string";
       }
       if (ch === "'") {
-        stream.match(/.+?[']/);
+        stream.match(/.*?'/);
         return "string";
       }
       if (/[{}\(\),\.;\[\]]/.test(ch)) {

mode/cypher/test.js

@@ -16,4 +16,22 @@
 
   MT("singleQuotedString",
       "[string 'a'][variable b]");
+
+  MT("single attribute (with content)",
+      "[node {][atom a:][string 'a'][node }]");
+
+  MT("multiple attribute, singleQuotedString (with content)",
+      "[node {][atom a:][string 'a'][node ,][atom b:][string 'b'][node }]");
+
+  MT("multiple attribute, doubleQuotedString (with content)",
+      "[node {][atom a:][string \"a\"][node ,][atom b:][string \"b\"][node }]");
+
+  MT("single attribute (without content)",
+      "[node {][atom a:][string 'a'][node }]");
+
+  MT("multiple attribute, singleQuotedString (without content)",
+      "[node {][atom a:][string ''][node ,][atom b:][string ''][node }]");
+
+  MT("multiple attribute, doubleQuotedString (without content)",
+      "[node {][atom a:][string \"\"][node ,][atom b:][string \"\"][node }]");
  })();