added tests for get with paths

packages/ember-metal/tests/accessors/get_test.js

@@ -1,6 +1,8 @@
 import { ENV } from 'ember-environment';
+import { Object as EmberObject } from 'ember-runtime';
 import { get, getWithDefault, Mixin, observer, computed } from '../..';
 import { moduleFor, AbstractTestCase } from 'internal-test-helpers';
+import { run } from '@ember/runloop';
 
 function aget(x, y) {
   return x[y];
@@ -98,6 +100,23 @@ moduleFor(
       }
     }
 
+    ["@test get works with paths correctly"](assert) {
+      let func = function() {};
+      func.bar = 'awesome';
+
+      let destroyedObj = EmberObject.create({ bar: 'great' });
+      run(() => destroyedObj.destroy());
+
+      assert.equal(get({ foo: null }, 'foo.bar'), undefined);
+      assert.equal(get({ foo: { bar: 'hello' } }, 'foo.bar.length'), 5);
+      assert.equal(get({ foo: func }, 'foo.bar'), 'awesome');
+      assert.equal(get({ foo: func }, 'foo.bar.length'), 7);
+      assert.equal(get({}, 'foo.bar.length'), undefined);
+      assert.equal(get(function(){}, 'foo.bar.length'), undefined);
+      assert.equal(get('', 'foo.bar.length'), undefined);
+      assert.equal(get({ foo: destroyedObj }, 'foo.bar'), undefined);
+    }
+
     ['@test warn on attempts to call get with no arguments']() {
       expectAssertion(function() {
         get('aProperty');