Got tests running on single property character

app/imports/api/creature/computation/newEngine/utility/applyFnToKey.test.js

@@ -0,0 +1,60 @@
+import applyFnToKey from './applyFnToKey.js';
+import { assert } from 'chai';
+import { get } from 'lodash';
+
+describe('apply function to key', function(){
+  it('uses a basic key correctly', function(){
+    let obj = getStartingObject();
+    applyFnToKey(obj, 'fox.name', (doc, key) => {
+      assert.equal(obj, doc);
+      assert.equal(key, 'fox.name');
+      assert.equal(get(doc, key), 'foxy');
+    });
+  });
+  it('uses a single nested key correctly', function(){
+    let obj = getStartingObject();
+    let foxSounds = [];
+    applyFnToKey(obj, 'fox.sound.$', (doc, key) => {
+      foxSounds.push(get(doc, key));
+    });
+    assert.include(foxSounds, 'wah');
+    assert.include(foxSounds, 'tjoef');
+    assert.include(foxSounds, 'kek');
+  });
+  it('uses a double nested key correctly', function(){
+    let obj = getStartingObject();
+    let birdSounds = [];
+    applyFnToKey(obj, 'birds.$.sound.$', (doc, key) => {
+      birdSounds.push(get(doc, key));
+    });
+    assert.include(birdSounds, 'koer');
+    assert.include(birdSounds, 'hello');
+    assert.include(birdSounds, 'squawk');
+  });
+});
+
+function getStartingObject(){
+  return {
+    fox: {
+      name: 'foxy',
+      sound: [
+        'tjoef',
+        'kek',
+        'wah'
+      ]
+    },
+    birds: [{
+      name: 'pigeon',
+      sound: [
+        'koer',
+      ]
+    },{
+      name: 'parrot',
+      sound: [
+        'hello',
+        'cracker?',
+        'squawk',
+      ]
+    }]
+  }
+}