Fix tests

Author: wagenet

packages/@ember/-internals/runtime/tests/system/native_array/a_test.js

@@ -1,5 +1,6 @@
 import EmberArray, { NativeArray } from '@ember/array';
 import { A } from '@ember/array';
+import { ENV } from '@ember/-internals/environment';
 import { isEmberArray } from '@ember/-internals/utils';
 import { moduleFor, AbstractTestCase } from 'internal-test-helpers';
 
@@ -23,38 +24,45 @@ moduleFor(
         assert.ok(EmberArray.detect(new A([1, 2])), 'returned an ember array');
       });
     }
+  }
+);
 
-    ['@test Ember.A does not modify original'](assert) {
-      let original = [1, 2];
-      let proxy = A(original);
+if (ENV.EXTEND_PROTOTYPES.Array) {
+  moduleFor(
+    'Ember.A without Extended Prototypes',
+    class extends AbstractTestCase {
+      ['@test Ember.A does not modify original'](assert) {
+        let original = [1, 2];
+        let proxy = A(original);
 
-      assert.notOk(EmberArray.detect(original), 'EmberArray is not detected in the original');
-      assert.ok(EmberArray.detect(proxy), 'EmberArray is detected in the proxy');
+        assert.notOk(EmberArray.detect(original), 'EmberArray is not detected in the original');
+        assert.ok(EmberArray.detect(proxy), 'EmberArray is detected in the proxy');
 
-      assert.notOk(NativeArray.detect(original), 'NativeArray is not detected in the original');
-      assert.ok(NativeArray.detect(proxy), 'NativeArray is detected in the proxy');
+        assert.notOk(NativeArray.detect(original), 'NativeArray is not detected in the original');
+        assert.ok(NativeArray.detect(proxy), 'NativeArray is detected in the proxy');
 
-      assert.strictEqual(proxy.objectAt(1), 2, 'proxies to original array');
+        assert.strictEqual(proxy.objectAt(1), 2, 'proxies to original array');
 
-      proxy.pushObject(3);
-      assert.deepEqual(original, [1, 2, 3], 'original array gets updated');
+        proxy.pushObject(3);
+        assert.deepEqual(original, [1, 2, 3], 'original array gets updated');
 
-      assert.notOk(isEmberArray(original), 'original is not EmberArray');
-      assert.ok(isEmberArray(proxy), 'proxy is EmberArray');
+        assert.notOk(isEmberArray(original), 'original is not EmberArray');
+        assert.ok(isEmberArray(proxy), 'proxy is EmberArray');
 
-      assert.ok(Array.isArray(proxy), 'proxy is a native array');
+        assert.ok(Array.isArray(proxy), 'proxy is a native array');
 
-      proxy.pushObjects([4, 5]);
-      assert.deepEqual(original, [1, 2, 3, 4, 5], 'pushObjects works');
-    }
+        proxy.pushObjects([4, 5]);
+        assert.deepEqual(original, [1, 2, 3, 4, 5], 'pushObjects works');
+      }
 
-    ['@test Ember.A adds warnings about modification to original']() {
-      let original = [1, 2];
-      A(original);
+      ['@test Ember.A adds warnings about modification to original']() {
+        let original = [1, 2];
+        A(original);
 
-      expectAssertion(() => {
-        original.pushObject(1);
-      });
+        expectAssertion(() => {
+          original.pushObject(1);
+        });
+      }
     }
-  }
-);
+  );
+}