Lots of work on the parser including testing interface

app/imports/parser/parseTree/ParenthesisNode.js

@@ -0,0 +1,19 @@
+import ParseNode from '/imports/parser/parseTree/ParseNode.js';
+
+export default class ParenthesisNode extends ParseNode {
+  constructor({content}) {
+		super();
+    this.content = content;
+  }
+  compile(){
+    let content = this.content.compile();
+    if (content.constructor.name === 'ConstantNode'){
+      return content;
+    } else {
+      return new ParenthesisNode({content});
+    }
+  }
+  toString(){
+    return `(${this.content.toString()})`;
+  }
+}