Got tests running on single property character

app/imports/api/creature/computation/newEngine/buildComputation/CreatureComputation.js

@@ -0,0 +1,36 @@
+import { cloneDeep } from 'lodash';
+import createGraph from 'ngraph.graph';
+
+export default class CreatureComputation {
+  constructor(properties){
+    // Set up fields
+    this.originalPropsById =  {};
+    this.propsById =  {};
+    this.propsByType =  {};
+    this.propsByVariableName =  {};
+    this.props =  properties;
+    this.dependencyGraph = createGraph();
+
+    // Store properties for easy access later
+    properties.forEach(prop => {
+      // Store a copy of the unmodified prop
+      this.originalPropsById[prop._id] = cloneDeep(prop);
+
+      // Store by id
+      this.propsById[prop._id] = prop;
+
+      // Store by type
+      this.propsByType[prop.type] ?
+        this.propsByType[prop.type].push(prop) :
+        this.propsByType[prop.type] = [prop];
+
+      // Store by variableName
+      this.propsByVariableName[prop.variableName] ?
+        this.propsByVariableName[prop.variableName].push(prop) :
+        this.propsByVariableName[prop.variableName]= [prop];
+
+      // Store the prop in the dependency graph
+      this.dependencyGraph.addNode(prop._id, prop);
+    });
+  }
+}